diff --git a/src/app/Domain.php b/src/app/Domain.php
index 2da10979..668378c4 100644
--- a/src/app/Domain.php
+++ b/src/app/Domain.php
@@ -1,464 +1,478 @@
 <?php
 
 namespace App;
 
 use App\Wallet;
+use App\Traits\DomainConfigTrait;
+use App\Traits\SettingsTrait;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
 /**
  * The eloquent definition of a Domain.
  *
  * @property string $namespace
  * @property int    $status
  * @property int    $tenant_id
  * @property int    $type
  */
 class Domain extends Model
 {
+    use DomainConfigTrait;
+    use SettingsTrait;
     use SoftDeletes;
 
     // we've simply never heard of this domain
     public const STATUS_NEW        = 1 << 0;
     // it's been activated
     public const STATUS_ACTIVE     = 1 << 1;
     // domain has been suspended.
     public const STATUS_SUSPENDED  = 1 << 2;
     // domain has been deleted
     public const STATUS_DELETED    = 1 << 3;
     // ownership of the domain has been confirmed
     public const STATUS_CONFIRMED  = 1 << 4;
     // domain has been verified that it exists in DNS
     public const STATUS_VERIFIED   = 1 << 5;
     // domain has been created in LDAP
     public const STATUS_LDAP_READY = 1 << 6;
 
     // open for public registration
     public const TYPE_PUBLIC       = 1 << 0;
     // zone hosted with us
     public const TYPE_HOSTED       = 1 << 1;
     // zone registered externally
     public const TYPE_EXTERNAL     = 1 << 2;
 
     public const HASH_CODE = 1;
     public const HASH_TEXT = 2;
     public const HASH_CNAME = 3;
 
     public $incrementing = false;
 
     protected $keyType = 'bigint';
 
     protected $fillable = [
         'namespace',
         'status',
         'type'
     ];
 
     /**
      * Assign a package to a domain. The domain should not belong to any existing entitlements.
      *
      * @param \App\Package $package The package to assign.
      * @param \App\User    $user    The wallet owner.
      *
      * @return \App\Domain Self
      */
     public function assignPackage($package, $user)
     {
         // If this domain is public it can not be assigned to a user.
         if ($this->isPublic()) {
             return $this;
         }
 
         // See if this domain is already owned by another user.
         $wallet = $this->wallet();
 
         if ($wallet) {
             \Log::error(
                 "Domain {$this->namespace} is already assigned to {$wallet->owner->email}"
             );
 
             return $this;
         }
 
         $wallet_id = $user->wallets()->first()->id;
 
         foreach ($package->skus as $sku) {
             for ($i = $sku->pivot->qty; $i > 0; $i--) {
                 \App\Entitlement::create(
                     [
                         'wallet_id' => $wallet_id,
                         'sku_id' => $sku->id,
                         'cost' => $sku->pivot->cost(),
                         'fee' => $sku->pivot->fee(),
                         'entitleable_id' => $this->id,
                         'entitleable_type' => Domain::class
                     ]
                 );
             }
         }
 
         return $this;
     }
 
     /**
      * The domain entitlement.
      *
      * @return \Illuminate\Database\Eloquent\Relations\MorphOne
      */
     public function entitlement()
     {
         return $this->morphOne('App\Entitlement', 'entitleable');
     }
 
     /**
      * Return list of public+active domain names (for current tenant)
      */
     public static function getPublicDomains(): array
     {
         return self::withEnvTenant()
             ->whereRaw(sprintf('(type & %s)', Domain::TYPE_PUBLIC))
             ->get(['namespace'])->pluck('namespace')->toArray();
     }
 
     /**
      * Returns whether this domain is active.
      *
      * @return bool
      */
     public function isActive(): bool
     {
         return ($this->status & self::STATUS_ACTIVE) > 0;
     }
 
     /**
      * Returns whether this domain is confirmed the ownership of.
      *
      * @return bool
      */
     public function isConfirmed(): bool
     {
         return ($this->status & self::STATUS_CONFIRMED) > 0;
     }
 
     /**
      * Returns whether this domain is deleted.
      *
      * @return bool
      */
     public function isDeleted(): bool
     {
         return ($this->status & self::STATUS_DELETED) > 0;
     }
 
     /**
      * Returns whether this domain is registered with us.
      *
      * @return bool
      */
     public function isExternal(): bool
     {
         return ($this->type & self::TYPE_EXTERNAL) > 0;
     }
 
     /**
      * Returns whether this domain is hosted with us.
      *
      * @return bool
      */
     public function isHosted(): bool
     {
         return ($this->type & self::TYPE_HOSTED) > 0;
     }
 
     /**
      * Returns whether this domain is new.
      *
      * @return bool
      */
     public function isNew(): bool
     {
         return ($this->status & self::STATUS_NEW) > 0;
     }
 
     /**
      * Returns whether this domain is public.
      *
      * @return bool
      */
     public function isPublic(): bool
     {
         return ($this->type & self::TYPE_PUBLIC) > 0;
     }
 
     /**
      * Returns whether this domain is registered in LDAP.
      *
      * @return bool
      */
     public function isLdapReady(): bool
     {
         return ($this->status & self::STATUS_LDAP_READY) > 0;
     }
 
     /**
      * Returns whether this domain is suspended.
      *
      * @return bool
      */
     public function isSuspended(): bool
     {
         return ($this->status & self::STATUS_SUSPENDED) > 0;
     }
 
     /**
      * Returns whether this (external) domain has been verified
      * to exist in DNS.
      *
      * @return bool
      */
     public function isVerified(): bool
     {
         return ($this->status & self::STATUS_VERIFIED) > 0;
     }
 
     /**
      * Ensure the namespace is appropriately cased.
      */
     public function setNamespaceAttribute($namespace)
     {
         $this->attributes['namespace'] = strtolower($namespace);
     }
 
     /**
      * Domain status mutator
      *
      * @throws \Exception
      */
     public function setStatusAttribute($status)
     {
         $new_status = 0;
 
         $allowed_values = [
             self::STATUS_NEW,
             self::STATUS_ACTIVE,
             self::STATUS_SUSPENDED,
             self::STATUS_DELETED,
             self::STATUS_CONFIRMED,
             self::STATUS_VERIFIED,
             self::STATUS_LDAP_READY,
         ];
 
         foreach ($allowed_values as $value) {
             if ($status & $value) {
                 $new_status |= $value;
                 $status ^= $value;
             }
         }
 
         if ($status > 0) {
             throw new \Exception("Invalid domain status: {$status}");
         }
 
         if ($this->isPublic()) {
             $this->attributes['status'] = $new_status;
             return;
         }
 
         if ($new_status & self::STATUS_CONFIRMED) {
             // if we have confirmed ownership of or management access to the domain, then we have
             // also confirmed the domain exists in DNS.
             $new_status |= self::STATUS_VERIFIED;
             $new_status |= self::STATUS_ACTIVE;
         }
 
         if ($new_status & self::STATUS_DELETED && $new_status & self::STATUS_ACTIVE) {
             $new_status ^= self::STATUS_ACTIVE;
         }
 
         if ($new_status & self::STATUS_SUSPENDED && $new_status & self::STATUS_ACTIVE) {
             $new_status ^= self::STATUS_ACTIVE;
         }
 
         // if the domain is now active, it is not new anymore.
         if ($new_status & self::STATUS_ACTIVE && $new_status & self::STATUS_NEW) {
             $new_status ^= self::STATUS_NEW;
         }
 
         $this->attributes['status'] = $new_status;
     }
 
     /**
      * Ownership verification by checking for a TXT (or CNAME) record
      * in the domain's DNS (that matches the verification hash).
      *
      * @return bool True if verification was successful, false otherwise
      * @throws \Exception Throws exception on DNS or DB errors
      */
     public function confirm(): bool
     {
         if ($this->isConfirmed()) {
             return true;
         }
 
         $hash = $this->hash(self::HASH_TEXT);
         $confirmed = false;
 
         // Get DNS records and find a matching TXT entry
         $records = \dns_get_record($this->namespace, DNS_TXT);
 
         if ($records === false) {
             throw new \Exception("Failed to get DNS record for {$this->namespace}");
         }
 
         foreach ($records as $record) {
             if ($record['txt'] === $hash) {
                 $confirmed = true;
                 break;
             }
         }
 
         // Get DNS records and find a matching CNAME entry
         // Note: some servers resolve every non-existing name
         // so we need to define left and right side of the CNAME record
         // i.e.: kolab-verify IN CNAME <hash>.domain.tld.
         if (!$confirmed) {
             $cname = $this->hash(self::HASH_CODE) . '.' . $this->namespace;
             $records = \dns_get_record('kolab-verify.' . $this->namespace, DNS_CNAME);
 
             if ($records === false) {
                 throw new \Exception("Failed to get DNS record for {$this->namespace}");
             }
 
             foreach ($records as $records) {
                 if ($records['target'] === $cname) {
                     $confirmed = true;
                     break;
                 }
             }
         }
 
         if ($confirmed) {
             $this->status |= Domain::STATUS_CONFIRMED;
             $this->save();
         }
 
         return $confirmed;
     }
 
     /**
      * Generate a verification hash for this domain
      *
      * @param int $mod One of: HASH_CNAME, HASH_CODE (Default), HASH_TEXT
      *
      * @return string Verification hash
      */
     public function hash($mod = null): string
     {
         $cname = 'kolab-verify';
 
         if ($mod === self::HASH_CNAME) {
             return $cname;
         }
 
         $hash = \md5('hkccp-verify-' . $this->namespace);
 
         return $mod === self::HASH_TEXT ? "$cname=$hash" : $hash;
     }
 
+    /**
+     * Any (additional) properties of this domain.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function settings()
+    {
+        return $this->hasMany('App\DomainSetting', 'domain_id');
+    }
+
     /**
      * Suspend this domain.
      *
      * @return void
      */
     public function suspend(): void
     {
         if ($this->isSuspended()) {
             return;
         }
 
         $this->status |= Domain::STATUS_SUSPENDED;
         $this->save();
     }
 
     /**
      * The tenant for this domain.
      *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function tenant()
     {
         return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
     }
 
     /**
      * Unsuspend this domain.
      *
      * The domain is unsuspended through either of the following courses of actions;
      *
      *   * The account balance has been topped up, or
      *   * a suspected spammer has resolved their issues, or
      *   * the command-line is triggered.
      *
      * Therefore, we can also confidently set the domain status to 'active' should the ownership of or management
      * access to have been confirmed before.
      *
      * @return void
      */
     public function unsuspend(): void
     {
         if (!$this->isSuspended()) {
             return;
         }
 
         $this->status ^= Domain::STATUS_SUSPENDED;
 
         if ($this->isConfirmed() && $this->isVerified()) {
             $this->status |= Domain::STATUS_ACTIVE;
         }
 
         $this->save();
     }
 
     /**
      * Verify if a domain exists in DNS
      *
      * @return bool True if registered, False otherwise
      * @throws \Exception Throws exception on DNS or DB errors
      */
     public function verify(): bool
     {
         if ($this->isVerified()) {
             return true;
         }
 
         $records = \dns_get_record($this->namespace, DNS_ANY);
 
         if ($records === false) {
             throw new \Exception("Failed to get DNS record for {$this->namespace}");
         }
 
         // It may happen that result contains other domains depending on the host DNS setup
         // that's why in_array() and not just !empty()
         if (in_array($this->namespace, array_column($records, 'host'))) {
             $this->status |= Domain::STATUS_VERIFIED;
             $this->save();
 
             return true;
         }
 
         return false;
     }
 
     /**
      * Returns the wallet by which the domain is controlled
      *
      * @return \App\Wallet A wallet object
      */
     public function wallet(): ?Wallet
     {
         // Note: Not all domains have a entitlement/wallet
         $entitlement = $this->entitlement()->withTrashed()->orderBy('created_at', 'desc')->first();
 
         return $entitlement ? $entitlement->wallet : null;
     }
 }
diff --git a/src/app/DomainSetting.php b/src/app/DomainSetting.php
new file mode 100644
index 00000000..0cc55b2b
--- /dev/null
+++ b/src/app/DomainSetting.php
@@ -0,0 +1,34 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * A collection of settings for a Domain.
+ *
+ * @property int    $id
+ * @property int    $domain_id
+ * @property string $key
+ * @property string $value
+ */
+class DomainSetting extends Model
+{
+    protected $fillable = [
+        'domain_id', 'key', 'value'
+    ];
+
+    /**
+     * The domain to which this setting belongs.
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
+     */
+    public function domain()
+    {
+        return $this->belongsTo(
+            '\App\Domain',
+            'domain_id', /* local */
+            'id' /* remote */
+        );
+    }
+}
diff --git a/src/app/Http/Controllers/API/V4/DomainsController.php b/src/app/Http/Controllers/API/V4/DomainsController.php
index c33308ce..633608e5 100644
--- a/src/app/Http/Controllers/API/V4/DomainsController.php
+++ b/src/app/Http/Controllers/API/V4/DomainsController.php
@@ -1,381 +1,417 @@
 <?php
 
 namespace App\Http\Controllers\API\V4;
 
 use App\Domain;
 use App\Http\Controllers\Controller;
 use App\Backends\LDAP;
 use Carbon\Carbon;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
 
 class DomainsController extends Controller
 {
     /**
      * Return a list of domains owned by the current user
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function index()
     {
         $user = Auth::guard()->user();
         $list = [];
 
         foreach ($user->domains() as $domain) {
             if (!$domain->isPublic()) {
                 $data = $domain->toArray();
                 $data = array_merge($data, self::domainStatuses($domain));
                 $list[] = $data;
             }
         }
 
         return response()->json($list);
     }
 
     /**
      * Show the form for creating a new resource.
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function create()
     {
         return $this->errorResponse(404);
     }
 
     /**
      * Confirm ownership of the specified domain (via DNS check).
      *
      * @param int $id Domain identifier
      *
      * @return \Illuminate\Http\JsonResponse|void
      */
     public function confirm($id)
     {
         $domain = Domain::findOrFail($id);
 
         // Only owner (or admin) has access to the domain
         if (!Auth::guard()->user()->canRead($domain)) {
             return $this->errorResponse(403);
         }
 
         if (!$domain->confirm()) {
             return response()->json([
                     'status' => 'error',
                     'message' => \trans('app.domain-verify-error'),
             ]);
         }
 
         return response()->json([
                 'status' => 'success',
                 'statusInfo' => self::statusInfo($domain),
                 'message' => \trans('app.domain-verify-success'),
         ]);
     }
 
     /**
      * Remove the specified resource from storage.
      *
      * @param int $id
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function destroy($id)
     {
         return $this->errorResponse(404);
     }
 
     /**
      * Show the form for editing the specified resource.
      *
      * @param int $id
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function edit($id)
     {
         return $this->errorResponse(404);
     }
 
+    /**
+     * Set the domain configuration.
+     *
+     * @param int $id Domain identifier
+     *
+     * @return \Illuminate\Http\JsonResponse|void
+     */
+    public function setConfig($id)
+    {
+        $domain = Domain::find($id);
+
+        if (empty($domain)) {
+            return $this->errorResponse(404);
+        }
+
+        // Only owner (or admin) has access to the domain
+        if (!Auth::guard()->user()->canRead($domain)) {
+            return $this->errorResponse(403);
+        }
+
+        $errors = $domain->setConfig(request()->input());
+
+        if (!empty($errors)) {
+            return response()->json(['status' => 'error', 'errors' => $errors], 422);
+        }
+
+        return response()->json([
+                'status' => 'success',
+                'message' => \trans('app.domain-setconfig-success'),
+        ]);
+    }
+
+
     /**
      * Store a newly created resource in storage.
      *
      * @param \Illuminate\Http\Request $request
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function store(Request $request)
     {
         return $this->errorResponse(404);
     }
 
     /**
      * Get the information about the specified domain.
      *
      * @param int $id Domain identifier
      *
      * @return \Illuminate\Http\JsonResponse|void
      */
     public function show($id)
     {
         $domain = Domain::withEnvTenant()->findOrFail($id);
 
         // Only owner (or admin) has access to the domain
         if (!Auth::guard()->user()->canRead($domain)) {
             return $this->errorResponse(403);
         }
 
         $response = $domain->toArray();
 
         // Add hash information to the response
         $response['hash_text'] = $domain->hash(Domain::HASH_TEXT);
         $response['hash_cname'] = $domain->hash(Domain::HASH_CNAME);
         $response['hash_code'] = $domain->hash(Domain::HASH_CODE);
 
         // Add DNS/MX configuration for the domain
         $response['dns'] = self::getDNSConfig($domain);
-        $response['config'] = self::getMXConfig($domain->namespace);
+        $response['mx'] = self::getMXConfig($domain->namespace);
+
+        // Domain configuration, e.g. spf whitelist
+        $response['config'] = $domain->getConfig();
 
         // Status info
         $response['statusInfo'] = self::statusInfo($domain);
 
         $response = array_merge($response, self::domainStatuses($domain));
 
         return response()->json($response);
     }
 
     /**
      * Fetch domain status (and reload setup process)
      *
      * @param int $id Domain identifier
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function status($id)
     {
         $domain = Domain::withEnvTenant()->findOrFail($id);
 
         // Only owner (or admin) has access to the domain
         if (!Auth::guard()->user()->canRead($domain)) {
             return $this->errorResponse(403);
         }
 
         $response = self::statusInfo($domain);
 
         if (!empty(request()->input('refresh'))) {
             $updated = false;
             $last_step = 'none';
 
             foreach ($response['process'] as $idx => $step) {
                 $last_step = $step['label'];
 
                 if (!$step['state']) {
                     if (!$this->execProcessStep($domain, $step['label'])) {
                         break;
                     }
 
                     $updated = true;
                 }
             }
 
             if ($updated) {
                 $response = self::statusInfo($domain);
             }
 
             $success = $response['isReady'];
             $suffix = $success ? 'success' : 'error-' . $last_step;
 
             $response['status'] = $success ? 'success' : 'error';
             $response['message'] = \trans('app.process-' . $suffix);
         }
 
         $response = array_merge($response, self::domainStatuses($domain));
 
         return response()->json($response);
     }
 
     /**
      * Update the specified resource in storage.
      *
      * @param \Illuminate\Http\Request $request
      * @param int                      $id
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function update(Request $request, $id)
     {
         return $this->errorResponse(404);
     }
 
     /**
      * Provide DNS MX information to configure specified domain for
      */
     protected static function getMXConfig(string $namespace): array
     {
         $entries = [];
 
         // copy MX entries from an existing domain
         if ($master = \config('dns.copyfrom')) {
             // TODO: cache this lookup
             foreach ((array) dns_get_record($master, DNS_MX) as $entry) {
                 $entries[] = sprintf(
                     "@\t%s\t%s\tMX\t%d %s.",
                     \config('dns.ttl', $entry['ttl']),
                     $entry['class'],
                     $entry['pri'],
                     $entry['target']
                 );
             }
         } elseif ($static = \config('dns.static')) {
             $entries[] = strtr($static, array('\n' => "\n", '%s' => $namespace));
         }
 
         // display SPF settings
         if ($spf = \config('dns.spf')) {
             $entries[] = ';';
             foreach (['TXT', 'SPF'] as $type) {
                 $entries[] = sprintf(
                     "@\t%s\tIN\t%s\t\"%s\"",
                     \config('dns.ttl'),
                     $type,
                     $spf
                 );
             }
         }
 
         return $entries;
     }
 
     /**
      * Provide sample DNS config for domain confirmation
      */
     protected static function getDNSConfig(Domain $domain): array
     {
         $serial = date('Ymd01');
         $hash_txt = $domain->hash(Domain::HASH_TEXT);
         $hash_cname = $domain->hash(Domain::HASH_CNAME);
         $hash = $domain->hash(Domain::HASH_CODE);
 
         return [
             "@   IN  SOA ns1.dnsservice.com. hostmaster.{$domain->namespace}. (",
             "        {$serial}  10800  3600  604800  86400 )",
             ";",
             "@       IN  A   <some-ip>",
             "www     IN  A   <some-ip>",
             ";",
             "{$hash_cname}.{$domain->namespace}. IN CNAME {$hash}.{$domain->namespace}.",
             "@   3600    TXT \"{$hash_txt}\"",
         ];
     }
 
     /**
      * Prepare domain statuses for the UI
      *
      * @param \App\Domain $domain Domain object
      *
      * @return array Statuses array
      */
     protected static function domainStatuses(Domain $domain): array
     {
         return [
             'isLdapReady' => $domain->isLdapReady(),
             'isConfirmed' => $domain->isConfirmed(),
             'isVerified' => $domain->isVerified(),
             'isSuspended' => $domain->isSuspended(),
             'isActive' => $domain->isActive(),
             'isDeleted' => $domain->isDeleted() || $domain->trashed(),
         ];
     }
 
     /**
      * Domain status (extended) information.
      *
      * @param \App\Domain $domain Domain object
      *
      * @return array Status information
      */
     public static function statusInfo(Domain $domain): array
     {
         $process = [];
 
         // If that is not a public domain, add domain specific steps
         $steps = [
             'domain-new' => true,
             'domain-ldap-ready' => $domain->isLdapReady(),
             'domain-verified' => $domain->isVerified(),
             'domain-confirmed' => $domain->isConfirmed(),
         ];
 
         $count = count($steps);
 
         // Create a process check list
         foreach ($steps as $step_name => $state) {
             $step = [
                 'label' => $step_name,
                 'title' => \trans("app.process-{$step_name}"),
                 'state' => $state,
             ];
 
             if ($step_name == 'domain-confirmed' && !$state) {
                 $step['link'] = "/domain/{$domain->id}";
             }
 
             $process[] = $step;
 
             if ($state) {
                 $count--;
             }
         }
 
         $state = $count === 0 ? 'done' : 'running';
 
         // After 180 seconds assume the process is in failed state,
         // this should unlock the Refresh button in the UI
         if ($count > 0 && $domain->created_at->diffInSeconds(Carbon::now()) > 180) {
             $state = 'failed';
         }
 
         return [
             'process' => $process,
             'processState' => $state,
             'isReady' => $count === 0,
         ];
     }
 
     /**
      * Execute (synchronously) specified step in a domain setup process.
      *
      * @param \App\Domain $domain Domain object
      * @param string      $step   Step identifier (as in self::statusInfo())
      *
      * @return bool True if the execution succeeded, False otherwise
      */
     public static function execProcessStep(Domain $domain, string $step): bool
     {
         try {
             switch ($step) {
                 case 'domain-ldap-ready':
                     // Domain not in LDAP, create it
                     if (!$domain->isLdapReady()) {
                         LDAP::createDomain($domain);
                         $domain->status |= Domain::STATUS_LDAP_READY;
                         $domain->save();
                     }
                     return $domain->isLdapReady();
 
                 case 'domain-verified':
                     // Domain existence not verified
                     $domain->verify();
                     return $domain->isVerified();
 
                 case 'domain-confirmed':
                     // Domain ownership confirmation
                     $domain->confirm();
                     return $domain->isConfirmed();
             }
         } catch (\Exception $e) {
             \Log::error($e);
         }
 
         return false;
     }
 }
diff --git a/src/app/Http/Controllers/API/V4/UsersController.php b/src/app/Http/Controllers/API/V4/UsersController.php
index f60698a3..719db75c 100644
--- a/src/app/Http/Controllers/API/V4/UsersController.php
+++ b/src/app/Http/Controllers/API/V4/UsersController.php
@@ -1,813 +1,846 @@
 <?php
 
 namespace App\Http\Controllers\API\V4;
 
 use App\Http\Controllers\Controller;
 use App\Domain;
 use App\Group;
 use App\Rules\UserEmailDomain;
 use App\Rules\UserEmailLocal;
 use App\Sku;
 use App\User;
 use Carbon\Carbon;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Validator;
 use Illuminate\Support\Str;
 
 class UsersController extends Controller
 {
     /** @const array List of user setting keys available for modification in UI */
     public const USER_SETTINGS = [
         'billing_address',
         'country',
         'currency',
         'external_email',
         'first_name',
         'last_name',
         'organization',
         'phone',
     ];
 
     /**
      * On user create it is filled with a user or group object to force-delete
      * before the creation of a new user record is possible.
      *
      * @var \App\User|\App\Group|null
      */
     protected $deleteBeforeCreate;
 
 
     /**
      * Delete a user.
      *
      * @param int $id User identifier
      *
      * @return \Illuminate\Http\JsonResponse The response
      */
     public function destroy($id)
     {
         $user = User::find($id);
 
         if (empty($user)) {
             return $this->errorResponse(404);
         }
 
         // User can't remove himself until he's the controller
         if (!$this->guard()->user()->canDelete($user)) {
             return $this->errorResponse(403);
         }
 
         $user->delete();
 
         return response()->json([
                 'status' => 'success',
                 'message' => __('app.user-delete-success'),
         ]);
     }
 
     /**
      * Listing of users.
      *
      * The user-entitlements billed to the current user wallet(s)
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function index()
     {
         $user = $this->guard()->user();
 
         $result = $user->users()->orderBy('email')->get()->map(function ($user) {
             $data = $user->toArray();
             $data = array_merge($data, self::userStatuses($user));
             return $data;
         });
 
         return response()->json($result);
     }
 
+    /**
+     * Set user config.
+     *
+     * @param int $id The user
+     *
+     * @return \Illuminate\Http\JsonResponse
+     */
+    public function setConfig($id)
+    {
+        $user = User::find($id);
+
+        if (empty($user)) {
+            return $this->errorResponse(404);
+        }
+
+        if (!$this->guard()->user()->canRead($user)) {
+            return $this->errorResponse(403);
+        }
+
+        $errors = $user->setConfig(request()->input());
+
+        if (!empty($errors)) {
+            return response()->json(['status' => 'error', 'errors' => $errors], 422);
+        }
+
+        return response()->json([
+                'status' => 'success',
+                'message' => __('app.user-setconfig-success'),
+        ]);
+    }
+
     /**
      * Display information on the user account specified by $id.
      *
      * @param int $id The account to show information for.
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function show($id)
     {
         $user = User::find($id);
 
         if (empty($user)) {
             return $this->errorResponse(404);
         }
 
         if (!$this->guard()->user()->canRead($user)) {
             return $this->errorResponse(403);
         }
 
         $response = $this->userResponse($user);
 
         // Simplified Entitlement/SKU information,
         // TODO: I agree this format may need to be extended in future
         $response['skus'] = [];
         foreach ($user->entitlements as $ent) {
             $sku = $ent->sku;
             if (!isset($response['skus'][$sku->id])) {
                 $response['skus'][$sku->id] = ['costs' => [], 'count' => 0];
             }
             $response['skus'][$sku->id]['count']++;
             $response['skus'][$sku->id]['costs'][] = $ent->cost;
         }
 
+        $response['config'] = $user->getConfig();
+
         return response()->json($response);
     }
 
     /**
      * Fetch user status (and reload setup process)
      *
      * @param int $id User identifier
      *
      * @return \Illuminate\Http\JsonResponse
      */
     public function status($id)
     {
         $user = User::find($id);
 
         if (empty($user)) {
             return $this->errorResponse(404);
         }
 
         if (!$this->guard()->user()->canRead($user)) {
             return $this->errorResponse(403);
         }
 
         $response = self::statusInfo($user);
 
         if (!empty(request()->input('refresh'))) {
             $updated = false;
             $async = false;
             $last_step = 'none';
 
             foreach ($response['process'] as $idx => $step) {
                 $last_step = $step['label'];
 
                 if (!$step['state']) {
                     $exec = $this->execProcessStep($user, $step['label']);
 
                     if (!$exec) {
                         if ($exec === null) {
                             $async = true;
                         }
 
                         break;
                     }
 
                     $updated = true;
                 }
             }
 
             if ($updated) {
                 $response = self::statusInfo($user);
             }
 
             $success = $response['isReady'];
             $suffix = $success ? 'success' : 'error-' . $last_step;
 
             $response['status'] = $success ? 'success' : 'error';
             $response['message'] = \trans('app.process-' . $suffix);
 
             if ($async && !$success) {
                 $response['processState'] = 'waiting';
                 $response['status'] = 'success';
                 $response['message'] = \trans('app.process-async');
             }
         }
 
         $response = array_merge($response, self::userStatuses($user));
 
         return response()->json($response);
     }
 
     /**
      * User status (extended) information
      *
      * @param \App\User $user User object
      *
      * @return array Status information
      */
     public static function statusInfo(User $user): array
     {
         $process = [];
         $steps = [
             'user-new' => true,
             'user-ldap-ready' => $user->isLdapReady(),
             'user-imap-ready' => $user->isImapReady(),
         ];
 
         // Create a process check list
         foreach ($steps as $step_name => $state) {
             $step = [
                 'label' => $step_name,
                 'title' => \trans("app.process-{$step_name}"),
                 'state' => $state,
             ];
 
             $process[] = $step;
         }
 
         list ($local, $domain) = explode('@', $user->email);
         $domain = Domain::where('namespace', $domain)->first();
 
         // If that is not a public domain, add domain specific steps
         if ($domain && !$domain->isPublic()) {
             $domain_status = DomainsController::statusInfo($domain);
             $process = array_merge($process, $domain_status['process']);
         }
 
         $all = count($process);
         $checked = count(array_filter($process, function ($v) {
                 return $v['state'];
         }));
 
         $state = $all === $checked ? 'done' : 'running';
 
         // After 180 seconds assume the process is in failed state,
         // this should unlock the Refresh button in the UI
         if ($all !== $checked && $user->created_at->diffInSeconds(Carbon::now()) > 180) {
             $state = 'failed';
         }
 
         // Check if the user is a controller of his wallet
         $isController = $user->canDelete($user);
         $hasCustomDomain = $user->wallet()->entitlements()
             ->where('entitleable_type', Domain::class)
             ->count() > 0;
 
         // Get user's entitlements titles
         $skus = $user->entitlements()->select('skus.title')
             ->join('skus', 'skus.id', '=', 'entitlements.sku_id')
             ->get()
             ->pluck('title')
             ->sort()
             ->unique()
             ->values()
             ->all();
 
         return [
             'skus' => $skus,
             // TODO: This will change when we enable all users to create domains
             'enableDomains' => $isController && $hasCustomDomain,
             // TODO: Make 'enableDistlists' working for wallet controllers that aren't account owners
             'enableDistlists' => $isController && $hasCustomDomain && in_array('distlist', $skus),
             'enableUsers' => $isController,
             'enableWallets' => $isController,
             'process' => $process,
             'processState' => $state,
             'isReady' => $all === $checked,
         ];
     }
 
     /**
      * Create a new user record.
      *
      * @param \Illuminate\Http\Request $request The API request.
      *
      * @return \Illuminate\Http\JsonResponse The response
      */
     public function store(Request $request)
     {
         $current_user = $this->guard()->user();
         $owner = $current_user->wallet()->owner;
 
         if ($owner->id != $current_user->id) {
             return $this->errorResponse(403);
         }
 
         $this->deleteBeforeCreate = null;
 
         if ($error_response = $this->validateUserRequest($request, null, $settings)) {
             return $error_response;
         }
 
         if (empty($request->package) || !($package = \App\Package::find($request->package))) {
             $errors = ['package' => \trans('validation.packagerequired')];
             return response()->json(['status' => 'error', 'errors' => $errors], 422);
         }
 
         if ($package->isDomain()) {
             $errors = ['package' => \trans('validation.packageinvalid')];
             return response()->json(['status' => 'error', 'errors' => $errors], 422);
         }
 
         DB::beginTransaction();
 
         // @phpstan-ignore-next-line
         if ($this->deleteBeforeCreate) {
             $this->deleteBeforeCreate->forceDelete();
         }
 
         // Create user record
         $user = User::create([
                 'email' => $request->email,
                 'password' => $request->password,
         ]);
 
         $owner->assignPackage($package, $user);
 
         if (!empty($settings)) {
             $user->setSettings($settings);
         }
 
         if (!empty($request->aliases)) {
             $user->setAliases($request->aliases);
         }
 
         DB::commit();
 
         return response()->json([
                 'status' => 'success',
                 'message' => __('app.user-create-success'),
         ]);
     }
 
     /**
      * Update user data.
      *
      * @param \Illuminate\Http\Request $request The API request.
      * @param string                   $id      User identifier
      *
      * @return \Illuminate\Http\JsonResponse The response
      */
     public function update(Request $request, $id)
     {
         $user = User::find($id);
 
         if (empty($user)) {
             return $this->errorResponse(404);
         }
 
         $current_user = $this->guard()->user();
 
         // TODO: Decide what attributes a user can change on his own profile
         if (!$current_user->canUpdate($user)) {
             return $this->errorResponse(403);
         }
 
         if ($error_response = $this->validateUserRequest($request, $user, $settings)) {
             return $error_response;
         }
 
         // Entitlements, only controller can do that
         if ($request->skus !== null && !$current_user->canDelete($user)) {
             return $this->errorResponse(422, "You have no permission to change entitlements");
         }
 
         DB::beginTransaction();
 
         $this->updateEntitlements($user, $request->skus);
 
         if (!empty($settings)) {
             $user->setSettings($settings);
         }
 
         if (!empty($request->password)) {
             $user->password = $request->password;
             $user->save();
         }
 
         if (isset($request->aliases)) {
             $user->setAliases($request->aliases);
         }
 
         // TODO: Make sure that UserUpdate job is created in case of entitlements update
         //       and no password change. So, for example quota change is applied to LDAP
         // TODO: Review use of $user->save() in the above context
 
         DB::commit();
 
         $response = [
             'status' => 'success',
             'message' => __('app.user-update-success'),
         ];
 
         // For self-update refresh the statusInfo in the UI
         if ($user->id == $current_user->id) {
             $response['statusInfo'] = self::statusInfo($user);
         }
 
         return response()->json($response);
     }
 
     /**
      * Update user entitlements.
      *
      * @param \App\User $user  The user
      * @param array     $rSkus List of SKU IDs requested for the user in the form [id=>qty]
      */
     protected function updateEntitlements(User $user, $rSkus)
     {
         if (!is_array($rSkus)) {
             return;
         }
 
         // list of skus, [id=>obj]
         $skus = Sku::all()->mapWithKeys(
             function ($sku) {
                 return [$sku->id => $sku];
             }
         );
 
         // existing entitlement's SKUs
         $eSkus = [];
 
         $user->entitlements()->groupBy('sku_id')
             ->selectRaw('count(*) as total, sku_id')->each(
                 function ($e) use (&$eSkus) {
                     $eSkus[$e->sku_id] = $e->total;
                 }
             );
 
         foreach ($skus as $skuID => $sku) {
             $e = array_key_exists($skuID, $eSkus) ? $eSkus[$skuID] : 0;
             $r = array_key_exists($skuID, $rSkus) ? $rSkus[$skuID] : 0;
 
             if ($sku->handler_class == \App\Handlers\Mailbox::class) {
                 if ($r != 1) {
                     throw new \Exception("Invalid quantity of mailboxes");
                 }
             }
 
             if ($e > $r) {
                 // remove those entitled more than existing
                 $user->removeSku($sku, ($e - $r));
             } elseif ($e < $r) {
                 // add those requested more than entitled
                 $user->assignSku($sku, ($r - $e));
             }
         }
     }
 
     /**
      * Create a response data array for specified user.
      *
      * @param \App\User $user User object
      *
      * @return array Response data
      */
     public static function userResponse(User $user): array
     {
         $response = $user->toArray();
 
         // Settings
         $response['settings'] = [];
         foreach ($user->settings()->whereIn('key', self::USER_SETTINGS)->get() as $item) {
             $response['settings'][$item->key] = $item->value;
         }
 
         // Aliases
         $response['aliases'] = [];
         foreach ($user->aliases as $item) {
             $response['aliases'][] = $item->alias;
         }
 
         // Status info
         $response['statusInfo'] = self::statusInfo($user);
 
         $response = array_merge($response, self::userStatuses($user));
 
         // Add more info to the wallet object output
         $map_func = function ($wallet) use ($user) {
             $result = $wallet->toArray();
 
             if ($wallet->discount) {
                 $result['discount'] = $wallet->discount->discount;
                 $result['discount_description'] = $wallet->discount->description;
             }
 
             if ($wallet->user_id != $user->id) {
                 $result['user_email'] = $wallet->owner->email;
             }
 
             $provider = \App\Providers\PaymentProvider::factory($wallet);
             $result['provider'] = $provider->name();
 
             return $result;
         };
 
         // Information about wallets and accounts for access checks
         $response['wallets'] = $user->wallets->map($map_func)->toArray();
         $response['accounts'] = $user->accounts->map($map_func)->toArray();
         $response['wallet'] = $map_func($user->wallet());
 
         return $response;
     }
 
     /**
      * Prepare user statuses for the UI
      *
      * @param \App\User $user User object
      *
      * @return array Statuses array
      */
     protected static function userStatuses(User $user): array
     {
         return [
             'isImapReady' => $user->isImapReady(),
             'isLdapReady' => $user->isLdapReady(),
             'isSuspended' => $user->isSuspended(),
             'isActive' => $user->isActive(),
             'isDeleted' => $user->isDeleted() || $user->trashed(),
         ];
     }
 
     /**
      * Validate user input
      *
      * @param \Illuminate\Http\Request $request  The API request.
      * @param \App\User|null           $user     User identifier
      * @param array                    $settings User settings (from the request)
      *
      * @return \Illuminate\Http\JsonResponse|null The error response on error
      */
     protected function validateUserRequest(Request $request, $user, &$settings = [])
     {
         $rules = [
             'external_email' => 'nullable|email',
             'phone' => 'string|nullable|max:64|regex:/^[0-9+() -]+$/',
             'first_name' => 'string|nullable|max:128',
             'last_name' => 'string|nullable|max:128',
             'organization' => 'string|nullable|max:512',
             'billing_address' => 'string|nullable|max:1024',
             'country' => 'string|nullable|alpha|size:2',
             'currency' => 'string|nullable|alpha|size:3',
             'aliases' => 'array|nullable',
         ];
 
         if (empty($user) || !empty($request->password) || !empty($request->password_confirmation)) {
             $rules['password'] = 'required|min:4|max:2048|confirmed';
         }
 
         $errors = [];
 
         // Validate input
         $v = Validator::make($request->all(), $rules);
 
         if ($v->fails()) {
             $errors = $v->errors()->toArray();
         }
 
         $controller = $user ? $user->wallet()->owner : $this->guard()->user();
 
         // For new user validate email address
         if (empty($user)) {
             $email = $request->email;
 
             if (empty($email)) {
                 $errors['email'] = \trans('validation.required', ['attribute' => 'email']);
             } elseif ($error = self::validateEmail($email, $controller, $this->deleteBeforeCreate)) {
                 $errors['email'] = $error;
             }
         }
 
         // Validate aliases input
         if (isset($request->aliases)) {
             $aliases = [];
             $existing_aliases = $user ? $user->aliases()->get()->pluck('alias')->toArray() : [];
 
             foreach ($request->aliases as $idx => $alias) {
                 if (is_string($alias) && !empty($alias)) {
                     // Alias cannot be the same as the email address (new user)
                     if (!empty($email) && Str::lower($alias) == Str::lower($email)) {
                         continue;
                     }
 
                     // validate new aliases
                     if (
                         !in_array($alias, $existing_aliases)
                         && ($error = self::validateAlias($alias, $controller))
                     ) {
                         if (!isset($errors['aliases'])) {
                             $errors['aliases'] = [];
                         }
                         $errors['aliases'][$idx] = $error;
                         continue;
                     }
 
                     $aliases[] = $alias;
                 }
             }
 
             $request->aliases = $aliases;
         }
 
         if (!empty($errors)) {
             return response()->json(['status' => 'error', 'errors' => $errors], 422);
         }
 
         // Update user settings
         $settings = $request->only(array_keys($rules));
         unset($settings['password'], $settings['aliases'], $settings['email']);
 
         return null;
     }
 
     /**
      * Execute (synchronously) specified step in a user setup process.
      *
      * @param \App\User $user User object
      * @param string    $step Step identifier (as in self::statusInfo())
      *
      * @return bool|null True if the execution succeeded, False if not, Null when
      *                   the job has been sent to the worker (result unknown)
      */
     public static function execProcessStep(User $user, string $step): ?bool
     {
         try {
             if (strpos($step, 'domain-') === 0) {
                 list ($local, $domain) = explode('@', $user->email);
                 $domain = Domain::where('namespace', $domain)->first();
 
                 return DomainsController::execProcessStep($domain, $step);
             }
 
             switch ($step) {
                 case 'user-ldap-ready':
                     // User not in LDAP, create it
                     $job = new \App\Jobs\User\CreateJob($user->id);
                     $job->handle();
 
                     $user->refresh();
 
                     return $user->isLdapReady();
 
                 case 'user-imap-ready':
                     // User not in IMAP? Verify again
                     // Do it synchronously if the imap admin credentials are available
                     // otherwise let the worker do the job
                     if (!\config('imap.admin_password')) {
                         \App\Jobs\User\VerifyJob::dispatch($user->id);
 
                         return null;
                     }
 
                     $job = new \App\Jobs\User\VerifyJob($user->id);
                     $job->handle();
 
                     $user->refresh();
 
                     return $user->isImapReady();
             }
         } catch (\Exception $e) {
             \Log::error($e);
         }
 
         return false;
     }
 
     /**
      * Email address validation for use as a user mailbox (login).
      *
      * @param string                    $email   Email address
      * @param \App\User                 $user    The account owner
      * @param null|\App\User|\App\Group $deleted Filled with an instance of a deleted user or group
      *                                           with the specified email address, if exists
      *
      * @return ?string Error message on validation error
      */
     public static function validateEmail(string $email, \App\User $user, &$deleted = null): ?string
     {
         $deleted = null;
 
         if (strpos($email, '@') === false) {
             return \trans('validation.entryinvalid', ['attribute' => 'email']);
         }
 
         list($login, $domain) = explode('@', Str::lower($email));
 
         if (strlen($login) === 0 || strlen($domain) === 0) {
             return \trans('validation.entryinvalid', ['attribute' => 'email']);
         }
 
         // Check if domain exists
         $domain = Domain::where('namespace', $domain)->first();
 
         if (empty($domain)) {
             return \trans('validation.domaininvalid');
         }
 
         // Validate login part alone
         $v = Validator::make(
             ['email' => $login],
             ['email' => ['required', new UserEmailLocal(!$domain->isPublic())]]
         );
 
         if ($v->fails()) {
             return $v->errors()->toArray()['email'][0];
         }
 
         // Check if it is one of domains available to the user
         $domains = \collect($user->domains())->pluck('namespace')->all();
 
         if (!in_array($domain->namespace, $domains)) {
             return \trans('validation.entryexists', ['attribute' => 'domain']);
         }
 
         // Check if a user with specified address already exists
         if ($existing_user = User::emailExists($email, true)) {
             // If this is a deleted user in the same custom domain
             // we'll force delete him before
             if (!$domain->isPublic() && $existing_user->trashed()) {
                 $deleted = $existing_user;
             } else {
                 return \trans('validation.entryexists', ['attribute' => 'email']);
             }
         }
 
         // Check if an alias with specified address already exists.
         if (User::aliasExists($email)) {
             return \trans('validation.entryexists', ['attribute' => 'email']);
         }
 
         // Check if a group with specified address already exists
         if ($existing_group = Group::emailExists($email, true)) {
             // If this is a deleted group in the same custom domain
             // we'll force delete it before
             if (!$domain->isPublic() && $existing_group->trashed()) {
                 $deleted = $existing_group;
             } else {
                 return \trans('validation.entryexists', ['attribute' => 'email']);
             }
         }
 
         return null;
     }
 
     /**
      * Email address validation for use as an alias.
      *
      * @param string    $email Email address
      * @param \App\User $user  The account owner
      *
      * @return ?string Error message on validation error
      */
     public static function validateAlias(string $email, \App\User $user): ?string
     {
         if (strpos($email, '@') === false) {
             return \trans('validation.entryinvalid', ['attribute' => 'alias']);
         }
 
         list($login, $domain) = explode('@', Str::lower($email));
 
         if (strlen($login) === 0 || strlen($domain) === 0) {
             return \trans('validation.entryinvalid', ['attribute' => 'alias']);
         }
 
         // Check if domain exists
         $domain = Domain::where('namespace', $domain)->first();
 
         if (empty($domain)) {
             return \trans('validation.domaininvalid');
         }
 
         // Validate login part alone
         $v = Validator::make(
             ['alias' => $login],
             ['alias' => ['required', new UserEmailLocal(!$domain->isPublic())]]
         );
 
         if ($v->fails()) {
             return $v->errors()->toArray()['alias'][0];
         }
 
         // Check if it is one of domains available to the user
         $domains = \collect($user->domains())->pluck('namespace')->all();
 
         if (!in_array($domain->namespace, $domains)) {
             return \trans('validation.entryexists', ['attribute' => 'domain']);
         }
 
         // Check if a user with specified address already exists
         if ($existing_user = User::emailExists($email, true)) {
             // Allow an alias in a custom domain to an address that was a user before
             if ($domain->isPublic() || !$existing_user->trashed()) {
                 return \trans('validation.entryexists', ['attribute' => 'alias']);
             }
         }
 
         // Check if an alias with specified address already exists
         if (User::aliasExists($email)) {
             // Allow assigning the same alias to a user in the same group account,
             // but only for non-public domains
             if ($domain->isPublic()) {
                 return \trans('validation.entryexists', ['attribute' => 'alias']);
             }
         }
 
         // Check if a group with specified address already exists
         if (Group::emailExists($email)) {
             return \trans('validation.entryexists', ['attribute' => 'alias']);
         }
 
         return null;
     }
 }
diff --git a/src/app/Traits/DomainConfigTrait.php b/src/app/Traits/DomainConfigTrait.php
new file mode 100644
index 00000000..b67db0af
--- /dev/null
+++ b/src/app/Traits/DomainConfigTrait.php
@@ -0,0 +1,60 @@
+<?php
+
+namespace App\Traits;
+
+trait DomainConfigTrait
+{
+    /**
+     * A helper to get the domain configuration.
+     */
+    public function getConfig(): array
+    {
+        $config = [];
+
+        $spf = $this->getSetting('spf_whitelist');
+
+        $config['spf_whitelist'] = $spf ? json_decode($spf, true) : [];
+
+        return $config;
+    }
+
+    /**
+     * A helper to update domain configuration.
+     *
+     * @param array $config An array of configuration options
+     *
+     * @return array A list of input validation errors
+     */
+    public function setConfig(array $config): array
+    {
+        $errors = [];
+
+        foreach ($config as $key => $value) {
+            // validate and save SPF whitelist entries
+            if ($key === 'spf_whitelist') {
+                if (!is_array($value)) {
+                    $value = (array) $value;
+                }
+
+                foreach ($value as $i => $v) {
+                    if (empty($v)) {
+                        unset($value[$i]);
+                        continue;
+                    }
+
+                    if ($v[0] !== '.' || !filter_var(substr($v, 1), FILTER_VALIDATE_DOMAIN)) {
+                        $errors[$key][$i] = \trans('validation.spf-entry-invalid');
+                    }
+                }
+
+                if (empty($errors[$key])) {
+                    $this->setSetting($key, json_encode($value));
+                }
+            } else {
+                $errors[$key] = \trans('validation.invalid-config-parameter');
+            }
+        }
+
+        return $errors;
+    }
+}
diff --git a/src/app/Traits/UserConfigTrait.php b/src/app/Traits/UserConfigTrait.php
new file mode 100644
index 00000000..951488c0
--- /dev/null
+++ b/src/app/Traits/UserConfigTrait.php
@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Traits;
+
+trait UserConfigTrait
+{
+    /**
+     * A helper to get the user configuration.
+     */
+    public function getConfig(): array
+    {
+        $config = [];
+
+        // TODO: Should we store the default value somewhere in config?
+
+        $config['greylisting'] = $this->getSetting('greylisting') !== 'false';
+
+        return $config;
+    }
+
+    /**
+     * A helper to update user configuration.
+     *
+     * @param array $config An array of configuration options
+     *
+     * @return array A list of input validation error messages
+     */
+    public function setConfig(array $config): array
+    {
+        $errors = [];
+
+        foreach ($config as $key => $value) {
+            if ($key == 'greylisting') {
+                $this->setSetting('greylisting', $value ? 'true' : 'false');
+            } else {
+                $errors[$key] = \trans('validation.invalid-config-parameter');
+            }
+        }
+
+        return $errors;
+    }
+}
diff --git a/src/app/User.php b/src/app/User.php
index 88945c66..af5be1f0 100644
--- a/src/app/User.php
+++ b/src/app/User.php
@@ -1,798 +1,800 @@
 <?php
 
 namespace App;
 
 use App\Entitlement;
 use App\UserAlias;
 use App\Sku;
+use App\Traits\UserConfigTrait;
 use App\Traits\UserAliasesTrait;
 use App\Traits\SettingsTrait;
 use App\Wallet;
 use Illuminate\Database\Eloquent\SoftDeletes;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Iatstuti\Database\Support\NullableFields;
 use Tymon\JWTAuth\Contracts\JWTSubject;
 
 /**
  * The eloquent definition of a User.
  *
  * @property string $email
  * @property int    $id
  * @property string $password
  * @property int    $status
  * @property int    $tenant_id
  */
 class User extends Authenticatable implements JWTSubject
 {
     use NullableFields;
+    use UserConfigTrait;
     use UserAliasesTrait;
     use SettingsTrait;
     use SoftDeletes;
 
     // a new user, default on creation
     public const STATUS_NEW        = 1 << 0;
     // it's been activated
     public const STATUS_ACTIVE     = 1 << 1;
     // user has been suspended
     public const STATUS_SUSPENDED  = 1 << 2;
     // user has been deleted
     public const STATUS_DELETED    = 1 << 3;
     // user has been created in LDAP
     public const STATUS_LDAP_READY = 1 << 4;
     // user mailbox has been created in IMAP
     public const STATUS_IMAP_READY = 1 << 5;
 
 
     // change the default primary key type
     public $incrementing = false;
     protected $keyType = 'bigint';
 
     /**
      * The attributes that are mass assignable.
      *
      * @var array
      */
     protected $fillable = [
         'id',
         'email',
         'password',
         'password_ldap',
         'status',
     ];
 
     /**
      * The attributes that should be hidden for arrays.
      *
      * @var array
      */
     protected $hidden = [
         'password',
         'password_ldap',
         'role'
     ];
 
     protected $nullable = [
         'password',
         'password_ldap'
     ];
 
     /**
      * Any wallets on which this user is a controller.
      *
      * This does not include wallets owned by the user.
      *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
      */
     public function accounts()
     {
         return $this->belongsToMany(
             'App\Wallet',       // The foreign object definition
             'user_accounts',    // The table name
             'user_id',          // The local foreign key
             'wallet_id'         // The remote foreign key
         );
     }
 
     /**
      * Email aliases of this user.
      *
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */
     public function aliases()
     {
         return $this->hasMany('App\UserAlias', 'user_id');
     }
 
     /**
      * Assign a package to a user. The user should not have any existing entitlements.
      *
      * @param \App\Package   $package The package to assign.
      * @param \App\User|null $user    Assign the package to another user.
      *
      * @return \App\User
      */
     public function assignPackage($package, $user = null)
     {
         if (!$user) {
             $user = $this;
         }
 
         $wallet_id = $this->wallets()->first()->id;
 
         foreach ($package->skus as $sku) {
             for ($i = $sku->pivot->qty; $i > 0; $i--) {
                 \App\Entitlement::create(
                     [
                         'wallet_id' => $wallet_id,
                         'sku_id' => $sku->id,
                         'cost' => $sku->pivot->cost(),
                         'fee' => $sku->pivot->fee(),
                         'entitleable_id' => $user->id,
                         'entitleable_type' => User::class
                     ]
                 );
             }
         }
 
         return $user;
     }
 
     /**
      * Assign a package plan to a user.
      *
      * @param \App\Plan   $plan   The plan to assign
      * @param \App\Domain $domain Optional domain object
      *
      * @return \App\User Self
      */
     public function assignPlan($plan, $domain = null): User
     {
         $this->setSetting('plan_id', $plan->id);
 
         foreach ($plan->packages as $package) {
             if ($package->isDomain()) {
                 $domain->assignPackage($package, $this);
             } else {
                 $this->assignPackage($package);
             }
         }
 
         return $this;
     }
 
     /**
      * Assign a Sku to a user.
      *
      * @param \App\Sku $sku   The sku to assign.
      * @param int      $count Count of entitlements to add
      *
      * @return \App\User Self
      * @throws \Exception
      */
     public function assignSku(Sku $sku, int $count = 1): User
     {
         // TODO: I guess wallet could be parametrized in future
         $wallet = $this->wallet();
         $exists = $this->entitlements()->where('sku_id', $sku->id)->count();
 
         while ($count > 0) {
             \App\Entitlement::create([
                 'wallet_id' => $wallet->id,
                 'sku_id' => $sku->id,
                 'cost' => $exists >= $sku->units_free ? $sku->cost : 0,
                 'fee' => $exists >= $sku->units_free ? $sku->fee : 0,
                 'entitleable_id' => $this->id,
                 'entitleable_type' => User::class
             ]);
 
             $exists++;
             $count--;
         }
 
         return $this;
     }
 
     /**
      * Check if current user can delete another object.
      *
      * @param mixed $object A user|domain|wallet|group object
      *
      * @return bool True if he can, False otherwise
      */
     public function canDelete($object): bool
     {
         if (!method_exists($object, 'wallet')) {
             return false;
         }
 
         $wallet = $object->wallet();
 
         // TODO: For now controller can delete/update the account owner,
         //       this may change in future, controllers are not 0-regression feature
 
         return $this->wallets->contains($wallet) || $this->accounts->contains($wallet);
     }
 
     /**
      * Check if current user can read data of another object.
      *
      * @param mixed $object A user|domain|wallet|group object
      *
      * @return bool True if he can, False otherwise
      */
     public function canRead($object): bool
     {
         if ($this->role == 'admin') {
             return true;
         }
 
         if ($object instanceof User && $this->id == $object->id) {
             return true;
         }
 
         if ($this->role == 'reseller') {
             if ($object instanceof User && $object->role == 'admin') {
                 return false;
             }
 
             if ($object instanceof Wallet && !empty($object->owner)) {
                 $object = $object->owner;
             }
 
             return isset($object->tenant_id) && $object->tenant_id == $this->tenant_id;
         }
 
         if ($object instanceof Wallet) {
             return $object->user_id == $this->id || $object->controllers->contains($this);
         }
 
         if (!method_exists($object, 'wallet')) {
             return false;
         }
 
         $wallet = $object->wallet();
 
         return $wallet && ($this->wallets->contains($wallet) || $this->accounts->contains($wallet));
     }
 
     /**
      * Check if current user can update data of another object.
      *
      * @param mixed $object A user|domain|wallet|group object
      *
      * @return bool True if he can, False otherwise
      */
     public function canUpdate($object): bool
     {
         if ($object instanceof User && $this->id == $object->id) {
             return true;
         }
 
         if ($this->role == 'admin') {
             return true;
         }
 
         if ($this->role == 'reseller') {
             if ($object instanceof User && $object->role == 'admin') {
                 return false;
             }
 
             if ($object instanceof Wallet && !empty($object->owner)) {
                 $object = $object->owner;
             }
 
             return isset($object->tenant_id) && $object->tenant_id == $this->tenant_id;
         }
 
         return $this->canDelete($object);
     }
 
     /**
      * Return the \App\Domain for this user.
      *
      * @return \App\Domain|null
      */
     public function domain()
     {
         list($local, $domainName) = explode('@', $this->email);
 
         $domain = \App\Domain::withTrashed()->where('namespace', $domainName)->first();
 
         return $domain;
     }
 
     /**
      * List the domains to which this user is entitled.
      * Note: Active public domains are also returned (for the user tenant).
      *
      * @return Domain[] List of Domain objects
      */
     public function domains(): array
     {
         if ($this->tenant_id) {
             $domains = Domain::where('tenant_id', $this->tenant_id);
         } else {
             $domains = Domain::withEnvTenant();
         }
 
         $domains = $domains->whereRaw(sprintf('(type & %s)', Domain::TYPE_PUBLIC))
             ->whereRaw(sprintf('(status & %s)', Domain::STATUS_ACTIVE))
             ->get()
             ->all();
 
         foreach ($this->wallets as $wallet) {
             $entitlements = $wallet->entitlements()->where('entitleable_type', Domain::class)->get();
             foreach ($entitlements as $entitlement) {
                 $domains[] = $entitlement->entitleable;
             }
         }
 
         foreach ($this->accounts as $wallet) {
             $entitlements = $wallet->entitlements()->where('entitleable_type', Domain::class)->get();
             foreach ($entitlements as $entitlement) {
                 $domains[] = $entitlement->entitleable;
             }
         }
 
         return $domains;
     }
 
     /**
      * The user entitlement.
      *
      * @return \Illuminate\Database\Eloquent\Relations\MorphOne
      */
     public function entitlement()
     {
         return $this->morphOne('App\Entitlement', 'entitleable');
     }
 
     /**
      * Entitlements for this user.
      *
      * Note that these are entitlements that apply to the user account, and not entitlements that
      * this user owns.
      *
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */
     public function entitlements()
     {
         return $this->hasMany('App\Entitlement', 'entitleable_id', 'id')
             ->where('entitleable_type', User::class);
     }
 
     /**
      * Find whether an email address exists as a user (including deleted users).
      *
      * @param string $email       Email address
      * @param bool   $return_user Return User instance instead of boolean
      *
      * @return \App\User|bool True or User model object if found, False otherwise
      */
     public static function emailExists(string $email, bool $return_user = false)
     {
         if (strpos($email, '@') === false) {
             return false;
         }
 
         $email = \strtolower($email);
 
         $user = self::withTrashed()->where('email', $email)->first();
 
         if ($user) {
             return $return_user ? $user : true;
         }
 
         return false;
     }
 
     /**
      * Helper to find user by email address, whether it is
      * main email address, alias or an external email.
      *
      * If there's more than one alias NULL will be returned.
      *
      * @param string $email    Email address
      * @param bool   $external Search also for an external email
      *
      * @return \App\User User model object if found
      */
     public static function findByEmail(string $email, bool $external = false): ?User
     {
         if (strpos($email, '@') === false) {
             return null;
         }
 
         $email = \strtolower($email);
 
         $user = self::where('email', $email)->first();
 
         if ($user) {
             return $user;
         }
 
         $aliases = UserAlias::where('alias', $email)->get();
 
         if (count($aliases) == 1) {
             return $aliases->first()->user;
         }
 
         // TODO: External email
 
         return null;
     }
 
     public function getJWTIdentifier()
     {
         return $this->getKey();
     }
 
     public function getJWTCustomClaims()
     {
         return [];
     }
 
     /**
      * Return groups controlled by the current user.
      *
      * @param bool $with_accounts Include groups assigned to wallets
      *                            the current user controls but not owns.
      *
      * @return \Illuminate\Database\Eloquent\Builder Query builder
      */
     public function groups($with_accounts = true)
     {
         $wallets = $this->wallets()->pluck('id')->all();
 
         if ($with_accounts) {
             $wallets = array_merge($wallets, $this->accounts()->pluck('wallet_id')->all());
         }
 
         return Group::select(['groups.*', 'entitlements.wallet_id'])
             ->distinct()
             ->join('entitlements', 'entitlements.entitleable_id', '=', 'groups.id')
             ->whereIn('entitlements.wallet_id', $wallets)
             ->where('entitlements.entitleable_type', Group::class);
     }
 
     /**
      * Check if user has an entitlement for the specified SKU.
      *
      * @param string $title The SKU title
      *
      * @return bool True if specified SKU entitlement exists
      */
     public function hasSku($title): bool
     {
         $sku = Sku::where('title', $title)->first();
 
         if (!$sku) {
             return false;
         }
 
         return $this->entitlements()->where('sku_id', $sku->id)->count() > 0;
     }
 
     /**
      * Returns whether this domain is active.
      *
      * @return bool
      */
     public function isActive(): bool
     {
         return ($this->status & self::STATUS_ACTIVE) > 0;
     }
 
     /**
      * Returns whether this domain is deleted.
      *
      * @return bool
      */
     public function isDeleted(): bool
     {
         return ($this->status & self::STATUS_DELETED) > 0;
     }
 
     /**
      * Returns whether this (external) domain has been verified
      * to exist in DNS.
      *
      * @return bool
      */
     public function isImapReady(): bool
     {
         return ($this->status & self::STATUS_IMAP_READY) > 0;
     }
 
     /**
      * Returns whether this user is registered in LDAP.
      *
      * @return bool
      */
     public function isLdapReady(): bool
     {
         return ($this->status & self::STATUS_LDAP_READY) > 0;
     }
 
     /**
      * Returns whether this user is new.
      *
      * @return bool
      */
     public function isNew(): bool
     {
         return ($this->status & self::STATUS_NEW) > 0;
     }
 
     /**
      * Returns whether this domain is suspended.
      *
      * @return bool
      */
     public function isSuspended(): bool
     {
         return ($this->status & self::STATUS_SUSPENDED) > 0;
     }
 
     /**
      * A shortcut to get the user name.
      *
      * @param bool $fallback Return "<aa.name> User" if there's no name
      *
      * @return string Full user name
      */
     public function name(bool $fallback = false): string
     {
         $firstname = $this->getSetting('first_name');
         $lastname = $this->getSetting('last_name');
 
         $name = trim($firstname . ' ' . $lastname);
 
         if (empty($name) && $fallback) {
             return \config('app.name') . ' User';
         }
 
         return $name;
     }
 
     /**
      * Remove a number of entitlements for the SKU.
      *
      * @param \App\Sku $sku   The SKU
      * @param int      $count The number of entitlements to remove
      *
      * @return User Self
      */
     public function removeSku(Sku $sku, int $count = 1): User
     {
         $entitlements = $this->entitlements()
             ->where('sku_id', $sku->id)
             ->orderBy('cost', 'desc')
             ->orderBy('created_at')
             ->get();
 
         $entitlements_count = count($entitlements);
 
         foreach ($entitlements as $entitlement) {
             if ($entitlements_count <= $sku->units_free) {
                 continue;
             }
 
             if ($count > 0) {
                 $entitlement->delete();
                 $entitlements_count--;
                 $count--;
             }
         }
 
         return $this;
     }
 
     public function senderPolicyFrameworkWhitelist($clientName)
     {
         $setting = $this->getSetting('spf_whitelist');
 
         if (!$setting) {
             return false;
         }
 
         $whitelist = json_decode($setting);
 
         $matchFound = false;
 
         foreach ($whitelist as $entry) {
             if (substr($entry, 0, 1) == '/') {
                 $match = preg_match($entry, $clientName);
 
                 if ($match) {
                     $matchFound = true;
                 }
 
                 continue;
             }
 
             if (substr($entry, 0, 1) == '.') {
                 if (substr($clientName, (-1 * strlen($entry))) == $entry) {
                     $matchFound = true;
                 }
 
                 continue;
             }
 
             if ($entry == $clientName) {
                 $matchFound = true;
                 continue;
             }
         }
 
         return $matchFound;
     }
 
     /**
      * Any (additional) properties of this user.
      *
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */
     public function settings()
     {
         return $this->hasMany('App\UserSetting', 'user_id');
     }
 
     /**
      * Suspend this domain.
      *
      * @return void
      */
     public function suspend(): void
     {
         if ($this->isSuspended()) {
             return;
         }
 
         $this->status |= User::STATUS_SUSPENDED;
         $this->save();
     }
 
     /**
      * The tenant for this user account.
      *
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function tenant()
     {
         return $this->belongsTo('App\Tenant', 'tenant_id', 'id');
     }
 
     /**
      * Unsuspend this domain.
      *
      * @return void
      */
     public function unsuspend(): void
     {
         if (!$this->isSuspended()) {
             return;
         }
 
         $this->status ^= User::STATUS_SUSPENDED;
         $this->save();
     }
 
     /**
      * Return users controlled by the current user.
      *
      * @param bool $with_accounts Include users assigned to wallets
      *                            the current user controls but not owns.
      *
      * @return \Illuminate\Database\Eloquent\Builder Query builder
      */
     public function users($with_accounts = true)
     {
         $wallets = $this->wallets()->pluck('id')->all();
 
         if ($with_accounts) {
             $wallets = array_merge($wallets, $this->accounts()->pluck('wallet_id')->all());
         }
 
         return $this->select(['users.*', 'entitlements.wallet_id'])
             ->distinct()
             ->leftJoin('entitlements', 'entitlements.entitleable_id', '=', 'users.id')
             ->whereIn('entitlements.wallet_id', $wallets)
             ->where('entitlements.entitleable_type', User::class);
     }
 
     /**
      * Verification codes for this user.
      *
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */
     public function verificationcodes()
     {
         return $this->hasMany('App\VerificationCode', 'user_id', 'id');
     }
 
     /**
      * Returns the wallet by which the user is controlled
      *
      * @return ?\App\Wallet A wallet object
      */
     public function wallet(): ?Wallet
     {
         $entitlement = $this->entitlement()->withTrashed()->orderBy('created_at', 'desc')->first();
 
         // TODO: No entitlement should not happen, but in tests we have
         //       such cases, so we fallback to the user's wallet in this case
         return $entitlement ? $entitlement->wallet : $this->wallets()->first();
     }
 
     /**
      * Wallets this user owns.
      *
      * @return \Illuminate\Database\Eloquent\Relations\HasMany
      */
     public function wallets()
     {
         return $this->hasMany('App\Wallet');
     }
 
     /**
      * User password mutator
      *
      * @param string $password The password in plain text.
      *
      * @return void
      */
     public function setPasswordAttribute($password)
     {
         if (!empty($password)) {
             $this->attributes['password'] = bcrypt($password, [ "rounds" => 12 ]);
             $this->attributes['password_ldap'] = '{SSHA512}' . base64_encode(
                 pack('H*', hash('sha512', $password))
             );
         }
     }
 
     /**
      * User LDAP password mutator
      *
      * @param string $password The password in plain text.
      *
      * @return void
      */
     public function setPasswordLdapAttribute($password)
     {
         $this->setPasswordAttribute($password);
     }
 
     /**
      * User status mutator
      *
      * @throws \Exception
      */
     public function setStatusAttribute($status)
     {
         $new_status = 0;
 
         $allowed_values = [
             self::STATUS_NEW,
             self::STATUS_ACTIVE,
             self::STATUS_SUSPENDED,
             self::STATUS_DELETED,
             self::STATUS_LDAP_READY,
             self::STATUS_IMAP_READY,
         ];
 
         foreach ($allowed_values as $value) {
             if ($status & $value) {
                 $new_status |= $value;
                 $status ^= $value;
             }
         }
 
         if ($status > 0) {
             throw new \Exception("Invalid user status: {$status}");
         }
 
         $this->attributes['status'] = $new_status;
     }
 }
diff --git a/src/database/migrations/2020_11_20_120000_add_domains_primary_key.php b/src/database/migrations/2020_11_20_120000_add_domains_primary_key.php
new file mode 100644
index 00000000..8fb925be
--- /dev/null
+++ b/src/database/migrations/2020_11_20_120000_add_domains_primary_key.php
@@ -0,0 +1,39 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+// phpcs:ignore
+class AddDomainsPrimaryKey extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table(
+            'domains',
+            function (Blueprint $table) {
+                $table->primary('id');
+            }
+        );
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table(
+            'domains',
+            function (Blueprint $table) {
+                $table->dropPrimary('id');
+            }
+        );
+    }
+}
diff --git a/src/database/migrations/2020_11_20_130000_create_domain_settings_table.php b/src/database/migrations/2020_11_20_130000_create_domain_settings_table.php
new file mode 100644
index 00000000..5bd2fa3a
--- /dev/null
+++ b/src/database/migrations/2020_11_20_130000_create_domain_settings_table.php
@@ -0,0 +1,44 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+// phpcs:ignore
+class CreateDomainSettingsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create(
+            'domain_settings',
+            function (Blueprint $table) {
+                $table->bigIncrements('id');
+                $table->bigInteger('domain_id');
+                $table->string('key');
+                $table->text('value');
+                $table->timestamp('created_at')->useCurrent();
+                $table->timestamp('updated_at')->useCurrent();
+
+                $table->foreign('domain_id')->references('id')->on('domains')
+                    ->onDelete('cascade')->onUpdate('cascade');
+
+                $table->unique(['domain_id', 'key']);
+            }
+        );
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('domain_settings');
+    }
+}
diff --git a/src/database/migrations/2020_11_20_140000_extend_settings_value_column.php b/src/database/migrations/2020_11_20_140000_extend_settings_value_column.php
new file mode 100644
index 00000000..075741be
--- /dev/null
+++ b/src/database/migrations/2020_11_20_140000_extend_settings_value_column.php
@@ -0,0 +1,41 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+// phpcs:ignore
+class ExtendSettingsValueColumn extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table(
+            'user_settings',
+            function (Blueprint $table) {
+                $table->text('value')->change();
+            }
+        );
+
+        Schema::table(
+            'wallet_settings',
+            function (Blueprint $table) {
+                $table->text('value')->change();
+            }
+        );
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        // do nothing
+    }
+}
diff --git a/src/resources/js/app.js b/src/resources/js/app.js
index 31a6c847..20bca0bb 100644
--- a/src/resources/js/app.js
+++ b/src/resources/js/app.js
@@ -1,516 +1,520 @@
 /**
  * First we will load all of this project's JavaScript dependencies which
  * includes Vue and other libraries. It is a great starting point when
  * building robust, powerful web applications using Vue and Laravel.
  */
 
 require('./bootstrap')
 
 import AppComponent from '../vue/App'
 import MenuComponent from '../vue/Widgets/Menu'
 import SupportForm from '../vue/Widgets/SupportForm'
 import store from './store'
 import { loadLangAsync, i18n } from './locale'
 
 const loader = '<div class="app-loader"><div class="spinner-border" role="status"><span class="sr-only">Loading</span></div></div>'
 
 let isLoading = 0
 
 // Lock the UI with the 'loading...' element
 const startLoading = () => {
     isLoading++
     let loading = $('#app > .app-loader').removeClass('fadeOut')
     if (!loading.length) {
         $('#app').append($(loader))
     }
 }
 
 // Hide "loading" overlay
 const stopLoading = () => {
     if (isLoading > 0) {
         $('#app > .app-loader').addClass('fadeOut')
         isLoading--;
     }
 }
 
 let loadingRoute
 
 // Note: This has to be before the app is created
 // Note: You cannot use app inside of the function
 window.router.beforeEach((to, from, next) => {
     // check if the route requires authentication and user is not logged in
     if (to.meta.requiresAuth && !store.state.isLoggedIn) {
         // remember the original request, to use after login
         store.state.afterLogin = to;
 
         // redirect to login page
         next({ name: 'login' })
 
         return
     }
 
     if (to.meta.loading) {
         startLoading()
         loadingRoute = to.name
     }
 
     next()
 })
 
 window.router.afterEach((to, from) => {
     if (to.name && loadingRoute === to.name) {
         stopLoading()
         loadingRoute = null
     }
 
     // When changing a page remove old:
     // - error page
     // - modal backdrop
     $('#error-page,.modal-backdrop.show').remove()
 })
 
 const app = new Vue({
     components: {
         AppComponent,
         MenuComponent,
     },
     i18n,
     store,
     router: window.router,
     data() {
         return {
             isUser: !window.isAdmin && !window.isReseller,
             appName: window.config['app.name'],
             appUrl: window.config['app.url'],
             themeDir: '/themes/' + window.config['app.theme']
         }
     },
     methods: {
         // Clear (bootstrap) form validation state
         clearFormValidation(form) {
             $(form).find('.is-invalid').removeClass('is-invalid')
             $(form).find('.invalid-feedback').remove()
         },
         hasPermission(type) {
             const authInfo = store.state.authInfo
             const key = 'enable' + type.charAt(0).toUpperCase() + type.slice(1)
             return !!(authInfo && authInfo.statusInfo[key])
         },
         hasRoute(name) {
             return this.$router.resolve({ name: name }).resolved.matched.length > 0
         },
         hasSKU(name) {
             const authInfo = store.state.authInfo
             return authInfo.statusInfo.skus && authInfo.statusInfo.skus.indexOf(name) != -1
         },
         isController(wallet_id) {
             if (wallet_id && store.state.authInfo) {
                 let i
                 for (i = 0; i < store.state.authInfo.wallets.length; i++) {
                     if (wallet_id == store.state.authInfo.wallets[i].id) {
                         return true
                     }
                 }
                 for (i = 0; i < store.state.authInfo.accounts.length; i++) {
                     if (wallet_id == store.state.authInfo.accounts[i].id) {
                         return true
                     }
                 }
             }
 
             return false
         },
         // Set user state to "logged in"
         loginUser(response, dashboard, update) {
             if (!update) {
                 store.commit('logoutUser') // destroy old state data
                 store.commit('loginUser')
             }
 
             localStorage.setItem('token', response.access_token)
             axios.defaults.headers.common.Authorization = 'Bearer ' + response.access_token
 
             if (response.email) {
                 store.state.authInfo = response
             }
 
             if (dashboard !== false) {
                 this.$router.push(store.state.afterLogin || { name: 'dashboard' })
             }
 
             store.state.afterLogin = null
 
             // Refresh the token before it expires
             let timeout = response.expires_in || 0
 
             // We'll refresh 60 seconds before the token expires
             if (timeout > 60) {
                 timeout -= 60
             }
 
             // TODO: We probably should try a few times in case of an error
             // TODO: We probably should prevent axios from doing any requests
             //       while the token is being refreshed
 
             this.refreshTimeout = setTimeout(() => {
                 axios.post('/api/auth/refresh').then(response => {
                     this.loginUser(response.data, false, true)
                 })
             }, timeout * 1000)
         },
         // Set user state to "not logged in"
         logoutUser(redirect) {
             store.commit('logoutUser')
             localStorage.setItem('token', '')
             delete axios.defaults.headers.common.Authorization
 
             if (redirect !== false) {
                 this.$router.push({ name: 'login' })
             }
 
             clearTimeout(this.refreshTimeout)
         },
         logo(mode) {
             let src = this.appUrl + this.themeDir + '/images/logo_' + (mode || 'header') + '.png'
 
             return `<img src="${src}" alt="${this.appName}">`
         },
         // Display "loading" overlay inside of the specified element
         addLoader(elem, small = true) {
             $(elem).css({position: 'relative'}).append(small ? $(loader).addClass('small') : $(loader))
         },
         // Remove loader element added in addLoader()
         removeLoader(elem) {
             $(elem).find('.app-loader').remove()
         },
         startLoading,
         stopLoading,
         isLoading() {
             return isLoading > 0
         },
+        tab(e) {
+            e.preventDefault()
+            $(e.target).tab('show')
+        },
         errorPage(code, msg, hint) {
             // Until https://github.com/vuejs/vue-router/issues/977 is implemented
             // we can't really use router to display error page as it has two side
             // effects: it changes the URL and adds the error page to browser history.
             // For now we'll be replacing current view with error page "manually".
 
             if (!msg) msg = this.$te('error.' + code) ? this.$t('error.' + code) : this.$t('error.unknown')
             if (!hint) hint = ''
 
             const error_page = '<div id="error-page" class="error-page">'
                 + `<div class="code">${code}</div><div class="message">${msg}</div><div class="hint">${hint}</div>`
                 + '</div>'
 
             $('#error-page').remove()
             $('#app').append(error_page)
 
             app.updateBodyClass('error')
         },
         errorHandler(error) {
             this.stopLoading()
 
             if (!error.response) {
                 // TODO: probably network connection error
             } else if (error.response.status === 401) {
                 // Remember requested route to come back to it after log in
                 if (this.$route.meta.requiresAuth) {
                     store.state.afterLogin = this.$route
                     this.logoutUser()
                 } else {
                     this.logoutUser(false)
                 }
             } else {
                 this.errorPage(error.response.status, error.response.statusText)
             }
         },
         downloadFile(url) {
             // TODO: This might not be a best way for big files as the content
             //       will be stored (temporarily) in browser memory
             // TODO: This method does not show the download progress in the browser
             //       but it could be implemented in the UI, axios has 'progress' property
             axios.get(url, { responseType: 'blob' })
                 .then(response => {
                     const link = document.createElement('a')
                     const contentDisposition = response.headers['content-disposition']
                     let filename = 'unknown'
 
                     if (contentDisposition) {
                         const match = contentDisposition.match(/filename="(.+)"/);
                         if (match.length === 2) {
                             filename = match[1];
                         }
                     }
 
                     link.href = window.URL.createObjectURL(response.data)
                     link.download = filename
                     link.click()
                 })
         },
         price(price, currency) {
             // TODO: Set locale argument according to the currently used locale
             return ((price || 0) / 100).toLocaleString('de-DE', { style: 'currency', currency: currency || 'CHF' })
         },
         priceLabel(cost, discount) {
             let index = ''
 
             if (discount) {
                 cost = Math.floor(cost * ((100 - discount) / 100))
                 index = '\u00B9'
             }
 
             return this.price(cost) + '/month' + index
         },
         clickRecord(event) {
             if (!/^(a|button|svg|path)$/i.test(event.target.nodeName)) {
                 let link = $(event.target).closest('tr').find('a')[0]
                 if (link) {
                     link.click()
                 }
             }
         },
         domainStatusClass(domain) {
             if (domain.isDeleted) {
                 return 'text-muted'
             }
 
             if (domain.isSuspended) {
                 return 'text-warning'
             }
 
             if (!domain.isVerified || !domain.isLdapReady || !domain.isConfirmed) {
                 return 'text-danger'
             }
 
             return 'text-success'
         },
         domainStatusText(domain) {
             if (domain.isDeleted) {
                 return this.$t('status.deleted')
             }
 
             if (domain.isSuspended) {
                 return this.$t('status.suspended')
             }
 
             if (!domain.isVerified || !domain.isLdapReady || !domain.isConfirmed) {
                 return this.$t('status.notready')
             }
 
             return this.$t('status.active')
         },
         distlistStatusClass(list) {
             if (list.isDeleted) {
                 return 'text-muted'
             }
 
             if (list.isSuspended) {
                 return 'text-warning'
             }
 
             if (!list.isLdapReady) {
                 return 'text-danger'
             }
 
             return 'text-success'
         },
         distlistStatusText(list) {
             if (list.isDeleted) {
                 return this.$t('status.deleted')
             }
 
             if (list.isSuspended) {
                 return this.$t('status.suspended')
             }
 
             if (!list.isLdapReady) {
                 return this.$t('status.notready')
             }
 
             return this.$t('status.active')
         },
         pageName(path) {
             let page = this.$route.path
 
             // check if it is a "menu page", find the page name
             // otherwise we'll use the real path as page name
             window.config.menu.every(item => {
                 if (item.location == page && item.page) {
                     page = item.page
                     return false
                 }
             })
 
             page = page.replace(/^\//, '')
 
             return page ? page : '404'
         },
         supportDialog(container) {
             let dialog = $('#support-dialog')
 
             // FIXME: Find a nicer way of doing this
             if (!dialog.length) {
                 SupportForm.i18n = i18n
                 let form = new Vue(SupportForm)
                 form.$mount($('<div>').appendTo(container)[0])
                 form.$root = this
                 form.$toast = this.$toast
                 dialog = $(form.$el)
             }
 
             dialog.on('shown.bs.modal', () => {
                     dialog.find('input').first().focus()
                 }).modal()
         },
         userStatusClass(user) {
             if (user.isDeleted) {
                 return 'text-muted'
             }
 
             if (user.isSuspended) {
                 return 'text-warning'
             }
 
             if (!user.isImapReady || !user.isLdapReady) {
                 return 'text-danger'
             }
 
             return 'text-success'
         },
         userStatusText(user) {
             if (user.isDeleted) {
                 return this.$t('status.deleted')
             }
 
             if (user.isSuspended) {
                 return this.$t('status.suspended')
             }
 
             if (!user.isImapReady || !user.isLdapReady) {
                 return this.$t('status.notready')
             }
 
             return this.$t('status.active')
         },
         updateBodyClass(name) {
             // Add 'class' attribute to the body, different for each page
             // so, we can apply page-specific styles
             document.body.className = 'page-' + (name || this.pageName()).replace(/\/.*$/, '')
         }
     }
 })
 
 // Fetch the locale file and the start the app
 loadLangAsync().then(() => app.$mount('#app'))
 
 // Add a axios request interceptor
 window.axios.interceptors.request.use(
     config => {
         // This is the only way I found to change configuration options
         // on a running application. We need this for browser testing.
         config.headers['X-Test-Payment-Provider'] = window.config.paymentProvider
 
         return config
     },
     error => {
         // Do something with request error
         return Promise.reject(error)
     }
 )
 
 // Add a axios response interceptor for general/validation error handler
 window.axios.interceptors.response.use(
     response => {
         if (response.config.onFinish) {
             response.config.onFinish()
         }
 
         return response
     },
     error => {
         let error_msg
         let status = error.response ? error.response.status : 200
 
         // Do not display the error in a toast message, pass the error as-is
         if (error.config.ignoreErrors) {
             return Promise.reject(error)
         }
 
         if (error.config.onFinish) {
             error.config.onFinish()
         }
 
         if (error.response && status == 422) {
             error_msg = "Form validation error"
 
             const modal = $('div.modal.show')
 
             $(modal.length ? modal : 'form').each((i, form) => {
                 form = $(form)
 
                 $.each(error.response.data.errors || {}, (idx, msg) => {
                     const input_name = (form.data('validation-prefix') || form.find('form').first().data('validation-prefix') || '') + idx
                     let input = form.find('#' + input_name)
 
                     if (!input.length) {
                         input = form.find('[name="' + input_name + '"]');
                     }
 
                     if (input.length) {
                         // Create an error message
                         // API responses can use a string, array or object
                         let msg_text = ''
                         if ($.type(msg) !== 'string') {
                             $.each(msg, (index, str) => {
                                 msg_text += str + ' '
                             })
                         }
                         else {
                             msg_text = msg
                         }
 
                         let feedback = $('<div class="invalid-feedback">').text(msg_text)
 
                         if (input.is('.list-input')) {
                             // List input widget
                             let controls = input.children(':not(:first-child)')
 
                             if (!controls.length && typeof msg == 'string') {
                                 // this is an empty list (the main input only)
                                 // and the error message is not an array
                                 input.find('.main-input').addClass('is-invalid')
                             } else {
                                 controls.each((index, element) => {
                                     if (msg[index]) {
                                         $(element).find('input').addClass('is-invalid')
                                     }
                                 })
                             }
 
                             input.addClass('is-invalid').next('.invalid-feedback').remove()
                             input.after(feedback)
                         }
                         else {
                             // Standard form element
                             input.addClass('is-invalid')
                             input.parent().find('.invalid-feedback').remove()
                             input.parent().append(feedback)
                         }
                     }
                 })
 
                 form.find('.is-invalid:not(.listinput-widget)').first().focus()
             })
         }
         else if (error.response && error.response.data) {
             error_msg = error.response.data.message
         }
         else {
             error_msg = error.request ? error.request.statusText : error.message
         }
 
         app.$toast.error(error_msg || app.$t('error.server'))
 
         // Pass the error as-is
         return Promise.reject(error)
     }
 )
diff --git a/src/resources/lang/en/app.php b/src/resources/lang/en/app.php
index 57aac0ba..51509bac 100644
--- a/src/resources/lang/en/app.php
+++ b/src/resources/lang/en/app.php
@@ -1,78 +1,80 @@
 <?php
 
 return [
 
     /*
     |--------------------------------------------------------------------------
     | Application Language Lines
     |--------------------------------------------------------------------------
     |
     | The following language lines are used in the application.
     */
 
     'mandate-delete-success' => 'The auto-payment has been removed.',
     'mandate-update-success' => 'The auto-payment has been updated.',
 
     'planbutton' => 'Choose :plan',
 
     'process-async' => 'Setup process has been pushed. Please wait.',
     'process-user-new' => 'Registering a user...',
     'process-user-ldap-ready' => 'Creating a user...',
     'process-user-imap-ready' => 'Creating a mailbox...',
     'process-distlist-new' => 'Registering a distribution list...',
     'process-distlist-ldap-ready' => 'Creating a distribution list...',
     'process-domain-new' => 'Registering a custom domain...',
     'process-domain-ldap-ready' => 'Creating a custom domain...',
     'process-domain-verified' => 'Verifying a custom domain...',
     'process-domain-confirmed' => 'Verifying an ownership of a custom domain...',
     'process-success' => 'Setup process finished successfully.',
     'process-error-user-ldap-ready' => 'Failed to create a user.',
     'process-error-user-imap-ready' => 'Failed to verify that a mailbox exists.',
     'process-error-domain-ldap-ready' => 'Failed to create a domain.',
     'process-error-domain-verified' => 'Failed to verify a domain.',
     'process-error-domain-confirmed' => 'Failed to verify an ownership of a domain.',
     'process-distlist-new' => 'Registering a distribution list...',
     'process-distlist-ldap-ready' => 'Creating a distribution list...',
     'process-error-distlist-ldap-ready' => 'Failed to create a distribution list.',
 
     'distlist-update-success' => 'Distribution list updated successfully.',
     'distlist-create-success' => 'Distribution list created successfully.',
     'distlist-delete-success' => 'Distribution list deleted successfully.',
     'distlist-suspend-success' => 'Distribution list suspended successfully.',
     'distlist-unsuspend-success' => 'Distribution list unsuspended successfully.',
 
     'domain-verify-success' => 'Domain verified successfully.',
     'domain-verify-error' => 'Domain ownership verification failed.',
     'domain-suspend-success' => 'Domain suspended successfully.',
     'domain-unsuspend-success' => 'Domain unsuspended successfully.',
+    'domain-setconfig-success' => 'Domain settings updated successfully.',
 
     'user-update-success' => 'User data updated successfully.',
     'user-create-success' => 'User created successfully.',
     'user-delete-success' => 'User deleted successfully.',
     'user-suspend-success' => 'User suspended successfully.',
     'user-unsuspend-success' => 'User unsuspended successfully.',
     'user-reset-2fa-success' => '2-Factor authentication reset successfully.',
+    'user-setconfig-success' => 'User settings updated successfully.',
 
     'search-foundxdomains' => ':x domains have been found.',
     'search-foundxgroups' => ':x distribution lists have been found.',
     'search-foundxusers' => ':x user accounts have been found.',
 
     'signup-invitations-created' => 'The invitation has been created.|:count invitations has been created.',
     'signup-invitations-csv-empty' => 'Failed to find any valid email addresses in the uploaded file.',
     'signup-invitations-csv-invalid-email' => 'Found an invalid email address (:email) on line :line.',
     'signup-invitation-delete-success' => 'Invitation deleted successfully.',
     'signup-invitation-resend-success' => 'Invitation added to the sending queue successfully.',
 
     'support-request-success' => 'Support request submitted successfully.',
     'support-request-error' => 'Failed to submit the support request.',
 
     'wallet-award-success' => 'The bonus has been added to the wallet successfully.',
     'wallet-penalty-success' => 'The penalty has been added to the wallet successfully.',
     'wallet-update-success' => 'User wallet updated successfully.',
 
     'wallet-notice-date' => 'With your current subscriptions your account balance will last until about :date (:days).',
     'wallet-notice-nocredit' => 'You are out of credit, top up your balance now.',
     'wallet-notice-today' => 'You will run out of credit today, top up your balance now.',
     'wallet-notice-trial' => 'You are in your free trial period.',
     'wallet-notice-trial-end' => 'Your free trial is about to end, top up to continue.',
 ];
diff --git a/src/resources/lang/en/ui.php b/src/resources/lang/en/ui.php
index 4b9fecec..73ab2599 100644
--- a/src/resources/lang/en/ui.php
+++ b/src/resources/lang/en/ui.php
@@ -1,407 +1,419 @@
 <?php
 
 /**
  * This file will be converted to a Vue-i18n compatible JSON format on build time
  *
  * Note: The Laravel localization features do not work here. Vue-i18n rules are different
  */
 
 return [
 
     'app' => [
         'faq' => "FAQ",
     ],
 
     'btn' => [
         'add' => "Add",
         'accept' => "Accept",
         'back' => "Back",
         'cancel' => "Cancel",
         'close' => "Close",
         'continue' => "Continue",
         'delete' => "Delete",
         'deny' => "Deny",
         'download' => "Download",
         'edit' => "Edit",
         'file' => "Choose file...",
         'moreinfo' => "More information",
         'refresh' => "Refresh",
         'reset' => "Reset",
         'resend' => "Resend",
         'save' => "Save",
         'search' => "Search",
         'signup' => "Sign Up",
         'submit' => "Submit",
         'suspend' => "Suspend",
         'unsuspend' => "Unsuspend",
         'verify' => "Verify",
     ],
 
     'dashboard' => [
         'beta' => "beta",
         'distlists' => "Distribution lists",
         'chat' => "Video chat",
         'domains' => "Domains",
         'invitations' => "Invitations",
         'profile' => "Your profile",
         'users' => "User accounts",
         'wallet' => "Wallet",
         'webmail' => "Webmail",
         'stats' => "Stats",
     ],
 
     'distlist' => [
         'list-title' => "Distribution list | Distribution lists",
         'create' => "Create list",
         'delete' => "Delete list",
         'email' => "Email",
         'list-empty' => "There are no distribution lists in this account.",
         'new' => "New distribution list",
         'recipients' => "Recipients",
     ],
 
     'domain' => [
         'dns-verify' => "Domain DNS verification sample:",
         'dns-config' => "Domain DNS configuration sample:",
         'namespace' => "Namespace",
+        'spf-whitelist' => "SPF Whitelist",
+        'spf-whitelist-text' => "The Sender Policy Framework allows a sender domain to disclose, through DNS, "
+            . "which systems are allowed to send emails with an envelope sender address within said domain.",
+        'spf-whitelist-ex' => "Here you can specify a list of allowed servers, for example: <var>.ess.barracuda.com</var>.",
         'verify' => "Domain verification",
         'verify-intro' => "In order to confirm that you're the actual holder of the domain, we need to run a verification process before finally activating it for email delivery.",
         'verify-dns' => "The domain <b>must have one of the following entries</b> in DNS:",
         'verify-dns-txt' => "TXT entry with value:",
         'verify-dns-cname' => "or CNAME entry:",
         'verify-outro' => "When this is done press the button below to start the verification.",
         'verify-sample' => "Here's a sample zone file for your domain:",
         'config' => "Domain configuration",
         'config-intro' => "In order to let {app} receive email traffic for your domain you need to adjust the DNS settings, more precisely the MX entries, accordingly.",
         'config-sample' => "Edit your domain's zone file and replace existing MX entries with the following values:",
         'config-hint' => "If you don't know how to set DNS entries for your domain, please contact the registration service where you registered the domain or your web hosting provider.",
     ],
 
     'error' => [
         '400' => "Bad request",
         '401' => "Unauthorized",
         '403' => "Access denied",
         '404' => "Not found",
         '405' => "Method not allowed",
         '500' => "Internal server error",
         'unknown' => "Unknown Error",
         'server' => "Server Error",
     ],
 
     'form' => [
         'amount' => "Amount",
         'code' => "Confirmation Code",
         'config' => "Configuration",
         'date' => "Date",
         'description' => "Description",
         'details' => "Details",
+        'disabled' => "disabled",
         'domain' => "Domain",
         'email' => "Email Address",
+        'enabled' => "enabled",
         'firstname' => "First Name",
+        'general' => "General",
         'lastname' => "Last Name",
         'none' => "none",
         'or' => "or",
         'password' => "Password",
         'password-confirm' => "Confirm Password",
         'phone' => "Phone",
+        'settings' => "Settings",
         'status' => "Status",
         'surname' => "Surname",
         'user' => "User",
         'primary-email' => "Primary Email",
         'id' => "ID",
         'created' => "Created",
         'deleted' => "Deleted",
     ],
 
     'invitation' => [
         'create' => "Create invite(s)",
         'create-title' => "Invite for a signup",
         'create-email' => "Enter an email address of the person you want to invite.",
         'create-csv' => "To send multiple invitations at once, provide a CSV (comma separated) file, or alternatively a plain-text file, containing one email address per line.",
         'empty-list' => "There are no invitations in the database.",
         'title' => "Signup invitations",
         'search' => "Email address or domain",
         'send' => "Send invite(s)",
         'status-completed' => "User signed up",
         'status-failed' => "Sending failed",
         'status-sent' => "Sent",
         'status-new' => "Not sent yet",
     ],
 
     'lang' => [
         'en' => "English",
         'de' => "German",
         'fr' => "French",
         'it' => "Italian",
     ],
 
     'login' => [
         '2fa' => "Second factor code",
         '2fa_desc' => "Second factor code is optional for users with no 2-Factor Authentication setup.",
         'forgot_password' => "Forgot password?",
         'header' => "Please sign in",
         'sign_in' => "Sign in",
         'webmail' => "Webmail"
     ],
 
     'meet' => [
         'title' => "Voice & Video Conferencing",
         'welcome' => "Welcome to our beta program for Voice & Video Conferencing.",
         'url' => "You have a room of your own at the URL below. This room is only open when you yourself are in attendance. Use this URL to invite people to join you.",
         'notice' => "This is a work in progress and more features will be added over time. Current features include:",
         'sharing' => "Screen Sharing",
         'sharing-text' => "Share your screen for presentations or show-and-tell.",
         'security' => "Room Security",
         'security-text' => "Increase the room security by setting a password that attendees will need to know"
             . " before they can enter, or lock the door so attendees will have to knock, and a moderator can accept or deny those requests.",
         'qa' => "Raise Hand (Q&A)",
         'qa-text' => "Silent audience members can raise their hand to facilitate a Question & Answer session with the panel members.",
         'moderation' => "Moderator Delegation",
         'moderation-text' => "Delegate moderator authority for the session, so that a speaker is not needlessly"
             . " interrupted with attendees knocking and other moderator duties.",
         'eject' => "Eject Attendees",
         'eject-text' => "Eject attendees from the session in order to force them to reconnect, or address policy"
             . " violations. Click the user icon for effective dismissal.",
         'silent' => "Silent Audience Members",
         'silent-text' => "For a webinar-style session, configure the room to force all new attendees to be silent audience members.",
         'interpreters' => "Language Specific Audio Channels",
         'interpreters-text' => "Designate a participant to interpret the original audio to a target language, for sessions"
             . " with multi-lingual attendees. The interpreter is expected to be able to relay the original audio, and override it.",
         'beta-notice' => "Keep in mind that this is still in beta and might come with some issues."
             . " Should you encounter any on your way, let us know by contacting support.",
 
         // Room options dialog
         'options' => "Room options",
         'password' => "Password",
         'password-none' => "none",
         'password-clear' => "Clear password",
         'password-set' => "Set password",
         'password-text' => "You can add a password to your meeting. Participants will have to provide the password before they are allowed to join the meeting.",
         'lock' => "Locked room",
         'lock-text' => "When the room is locked participants have to be approved by a moderator before they could join the meeting.",
         'nomedia' => "Subscribers only",
         'nomedia-text' => "Forces all participants to join as subscribers (with camera and microphone turned off)."
             . " Moderators will be able to promote them to publishers throughout the session.",
 
         // Room menu
         'partcnt' => "Number of participants",
         'menu-audio-mute' => "Mute audio",
         'menu-audio-unmute' => "Unmute audio",
         'menu-video-mute' => "Mute video",
         'menu-video-unmute' => "Unmute video",
         'menu-screen' => "Share screen",
         'menu-hand-lower' => "Lower hand",
         'menu-hand-raise' => "Raise hand",
         'menu-channel' => "Interpreted language channel",
         'menu-chat' => "Chat",
         'menu-fullscreen' => "Full screen",
         'menu-fullscreen-exit' => "Exit full screen",
         'menu-leave' => "Leave session",
 
         // Room setup screen
         'setup-title' => "Set up your session",
         'mic' => "Microphone",
         'cam' => "Camera",
         'nick' => "Nickname",
         'nick-placeholder' => "Your name",
         'join' => "JOIN",
         'joinnow' => "JOIN NOW",
         'imaowner' => "I'm the owner",
 
         // Room
         'qa' => "Q & A",
         'leave-title' => "Room closed",
         'leave-body' => "The session has been closed by the room owner.",
         'media-title' => "Media setup",
         'join-request' => "Join request",
         'join-requested' => "{user} requested to join.",
 
         // Status messages
         'status-init' => "Checking the room...",
         'status-323' => "The room is closed. Please, wait for the owner to start the session.",
         'status-324' => "The room is closed. It will be open for others after you join.",
         'status-325' => "The room is ready. Please, provide a valid password.",
         'status-326' => "The room is locked. Please, enter your name and try again.",
         'status-327' => "Waiting for permission to join the room.",
         'status-404' => "The room does not exist.",
         'status-429' => "Too many requests. Please, wait.",
         'status-500' => "Failed to connect to the room. Server error.",
 
         // Other menus
         'media-setup' => "Media setup",
         'perm' => "Permissions",
         'perm-av' => "Audio &amp; Video publishing",
         'perm-mod' => "Moderation",
         'lang-int' => "Language interpreter",
         'menu-options' => "Options",
     ],
 
     'menu' => [
         'cockpit' => "Cockpit",
         'login' => "Login",
         'logout' => "Logout",
         'signup' => "Signup",
         'toggle' => "Toggle navigation",
     ],
 
     'msg' => [
         'initializing' => "Initializing...",
         'loading' => "Loading...",
         'loading-failed' => "Failed to load data.",
         'notfound' => "Resource not found.",
         'info' => "Information",
         'error' => "Error",
         'warning' => "Warning",
         'success' => "Success",
     ],
 
     'nav' => [
         'more' => "Load more",
         'step' => "Step {i}/{n}",
     ],
 
     'password' => [
         'reset' => "Password Reset",
         'reset-step1' => "Enter your email address to reset your password.",
         'reset-step1-hint' => "You may need to check your spam folder or unblock {email}.",
         'reset-step2' => "We sent out a confirmation code to your external email address."
             . " Enter the code we sent you, or click the link in the message.",
     ],
 
     'signup' => [
         'email' => "Existing Email Address",
         'login' => "Login",
         'title' => "Sign Up",
         'step1' => "Sign up to start your free month.",
         'step2' => "We sent out a confirmation code to your email address. Enter the code we sent you, or click the link in the message.",
         'step3' => "Create your Kolab identity (you can choose additional addresses later).",
         'voucher' => "Voucher Code",
     ],
 
     'status' => [
         'prepare-account' => "We are preparing your account.",
         'prepare-domain' => "We are preparing the domain.",
         'prepare-distlist' => "We are preparing the distribution list.",
         'prepare-user' => "We are preparing the user account.",
         'prepare-hint' => "Some features may be missing or readonly at the moment.",
         'prepare-refresh' => "The process never ends? Press the \"Refresh\" button, please.",
         'ready-account' => "Your account is almost ready.",
         'ready-domain' => "The domain is almost ready.",
         'ready-distlist' => "The distribution list is almost ready.",
         'ready-user' => "The user account is almost ready.",
         'verify' => "Verify your domain to finish the setup process.",
         'verify-domain' => "Verify domain",
         'deleted' => "Deleted",
         'suspended' => "Suspended",
         'notready' => "Not Ready",
         'active' => "Active",
     ],
 
     'support' => [
         'title' => "Contact Support",
         'id' => "Customer number or email address you have with us",
         'id-pl' => "e.g. 12345678 or john@kolab.org",
         'id-hint' => "Leave blank if you are not a customer yet",
         'name' => "Name",
         'name-pl' => "how we should call you in our reply",
         'email' => "Working email address",
         'email-pl' => "make sure we can reach you at this address",
         'summary' => "Issue Summary",
         'summary-pl' => "one sentence that summarizes your issue",
         'expl' => "Issue Explanation",
     ],
 
     'user' => [
         '2fa-hint1' => "This will remove 2-Factor Authentication entitlement as well as the user-configured factors.",
         '2fa-hint2' => "Please, make sure to confirm the user identity properly.",
         'address' => "Address",
         'aliases' => "Aliases",
         'aliases-email' => "Email Aliases",
         'aliases-none' => "This user has no email aliases.",
         'add-bonus' => "Add bonus",
         'add-bonus-title' => "Add a bonus to the wallet",
         'add-penalty' => "Add penalty",
         'add-penalty-title' => "Add a penalty to the wallet",
         'auto-payment' => "Auto-payment",
         'auto-payment-text' => "Fill up by <b>{amount} CHF</b> when under <b>{balance} CHF</b> using {method}",
         'country' => "Country",
         'create' => "Create user",
         'custno' => "Customer No.",
         'delete' => "Delete user",
         'delete-email' => "Delete {email}",
         'delete-text' => "Do you really want to delete this user permanently?"
             . " This will delete all account data and withdraw the permission to access the email account."
             . " Please note that this action cannot be undone.",
         'discount' => "Discount",
         'discount-hint' => "applied discount",
         'discount-title' => "Account discount",
         'distlists' => "Distribution lists",
         'distlists-none' => "There are no distribution lists in this account.",
         'domains' => "Domains",
         'domains-none' => "There are no domains in this account.",
         'ext-email' => "External Email",
         'finances' => "Finances",
+        'greylisting' => "Greylisting",
+        'greylisting-text' => "Greylisting is a method of defending users against spam. Any incoming mail from an unrecognized sender "
+            . "is temporarily rejected. The originating server should try again after a delay. "
+            . "This time the email will be accepted. Spammers usually do not reattempt mail delivery.",
         'list-title' => "User accounts",
         'managed-by' => "Managed by",
         'new' => "New user account",
         'org' => "Organization",
         'package' => "Package",
         'price' => "Price",
         'profile-title' => "Your profile",
         'profile-delete' => "Delete account",
         'profile-delete-title' => "Delete this account?",
         'profile-delete-text1' => "This will delete the account as well as all domains, users and aliases associated with this account.",
         'profile-delete-warning' => "This operation is irreversible",
         'profile-delete-text2' => "As you will not be able to recover anything after this point, please make sure that you have migrated all data before proceeding.",
         'profile-delete-support' => "As we always strive to improve, we would like to ask for 2 minutes of your time. "
             . "The best tool for improvement is feedback from users, and we would like to ask "
             . "for a few words about your reasons for leaving our service. Please send your feedback to <a href=\"{href}\">{email}</a>.",
         'profile-delete-contact' => "Also feel free to contact {app} Support with any questions or concerns that you may have in this context.",
         'reset-2fa' => "Reset 2-Factor Auth",
         'reset-2fa-title' => "2-Factor Authentication Reset",
         'title' => "User account",
         'search-pl' => "User ID, email or domain",
         'skureq' => "{sku} requires {list}.",
         'subscription' => "Subscription",
         'subscriptions' => "Subscriptions",
         'subscriptions-none' => "This user has no subscriptions.",
         'users' => "Users",
         'users-none' => "There are no users in this account.",
     ],
 
     'wallet' => [
         'add-credit' => "Add credit",
         'auto-payment-cancel' => "Cancel auto-payment",
         'auto-payment-change' => "Change auto-payment",
         'auto-payment-failed' => "The setup of automatic payments failed. Restart the process to enable automatic top-ups.",
         'auto-payment-hint' => "Here is how it works: Every time your account runs low, we will charge your preferred payment method for an amount you choose."
             . " You can cancel or change the auto-payment option at any time.",
         'auto-payment-setup' => "Set up auto-payment",
         'auto-payment-disabled' => "The configured auto-payment has been disabled. Top up your wallet or raise the auto-payment amount.",
         'auto-payment-info' => "Auto-payment is <b>set</b> to fill up your account by <b>{amount} CHF</b> every time your account balance gets under <b>{balance} CHF</b>.",
         'auto-payment-inprogress' => "The setup of the automatic payment is still in progress.",
         'auto-payment-next' => "Next, you will be redirected to the checkout page, where you can provide your credit card details.",
         'auto-payment-disabled-next' => "The auto-payment is disabled. Immediately after you submit new settings we'll enable it and attempt to top up your wallet.",
         'auto-payment-update' => "Update auto-payment",
         'banktransfer-hint' => "Please note that a bank transfer can take several days to complete.",
         'currency-conv' => "Here is how it works: You specify the amount by which you want to top up your wallet in {wc}."
             . " We will then convert this to {pc}, and on the next page you will be provided with the bank-details to transfer the amount in {pc}.",
         'fill-up' => "Fill up by",
         'history' => "History",
         'noperm' => "Only account owners can access a wallet.",
         'payment-amount-hint' => "Choose the amount by which you want to top up your wallet.",
         'payment-method' => "Method of payment: {method}",
         'payment-warning' => "You will be charged for {price}.",
         'pending-payments' => "Pending Payments",
         'pending-payments-warning' => "You have payments that are still in progress. See the \"Pending Payments\" tab below.",
         'pending-payments-none' => "There are no pending payments for this account.",
         'receipts' => "Receipts",
         'receipts-hint' => "Here you can download receipts (in PDF format) for payments in specified period. Select the period and press the Download button.",
         'receipts-none' => "There are no receipts for payments in this account. Please, note that you can download receipts after the month ends.",
         'title' => "Account balance",
         'top-up' => "Top up your wallet",
         'transactions' => "Transactions",
         'transactions-none' => "There are no transactions for this account.",
         'when-below' => "when account balance is below",
     ],
 ];
diff --git a/src/resources/lang/en/validation.php b/src/resources/lang/en/validation.php
index 0e11d2d0..b61d95db 100644
--- a/src/resources/lang/en/validation.php
+++ b/src/resources/lang/en/validation.php
@@ -1,171 +1,173 @@
 <?php
 
 return [
 
     /*
     |--------------------------------------------------------------------------
     | Validation Language Lines
     |--------------------------------------------------------------------------
     |
     | The following language lines contain the default error messages used by
     | the validator class. Some of these rules have multiple versions such
     | as the size rules. Feel free to tweak each of these messages here.
     |
     */
 
     'accepted' => 'The :attribute must be accepted.',
     'active_url' => 'The :attribute is not a valid URL.',
     'after' => 'The :attribute must be a date after :date.',
     'after_or_equal' => 'The :attribute must be a date after or equal to :date.',
     'alpha' => 'The :attribute may only contain letters.',
     'alpha_dash' => 'The :attribute may only contain letters, numbers, dashes and underscores.',
     'alpha_num' => 'The :attribute may only contain letters and numbers.',
     'array' => 'The :attribute must be an array.',
     'before' => 'The :attribute must be a date before :date.',
     'before_or_equal' => 'The :attribute must be a date before or equal to :date.',
     'between' => [
         'numeric' => 'The :attribute must be between :min and :max.',
         'file' => 'The :attribute must be between :min and :max kilobytes.',
         'string' => 'The :attribute must be between :min and :max characters.',
         'array' => 'The :attribute must have between :min and :max items.',
     ],
     'boolean' => 'The :attribute field must be true or false.',
     'confirmed' => 'The :attribute confirmation does not match.',
     'date' => 'The :attribute is not a valid date.',
     'date_equals' => 'The :attribute must be a date equal to :date.',
     'date_format' => 'The :attribute does not match the format :format.',
     'different' => 'The :attribute and :other must be different.',
     'digits' => 'The :attribute must be :digits digits.',
     'digits_between' => 'The :attribute must be between :min and :max digits.',
     'dimensions' => 'The :attribute has invalid image dimensions.',
     'distinct' => 'The :attribute field has a duplicate value.',
     'email' => 'The :attribute must be a valid email address.',
     'ends_with' => 'The :attribute must end with one of the following: :values',
     'exists' => 'The selected :attribute is invalid.',
     'file' => 'The :attribute must be a file.',
     'filled' => 'The :attribute field must have a value.',
     'gt' => [
         'numeric' => 'The :attribute must be greater than :value.',
         'file' => 'The :attribute must be greater than :value kilobytes.',
         'string' => 'The :attribute must be greater than :value characters.',
         'array' => 'The :attribute must have more than :value items.',
     ],
     'gte' => [
         'numeric' => 'The :attribute must be greater than or equal :value.',
         'file' => 'The :attribute must be greater than or equal :value kilobytes.',
         'string' => 'The :attribute must be greater than or equal :value characters.',
         'array' => 'The :attribute must have :value items or more.',
     ],
     'image' => 'The :attribute must be an image.',
     'in' => 'The selected :attribute is invalid.',
     'in_array' => 'The :attribute field does not exist in :other.',
     'integer' => 'The :attribute must be an integer.',
     'ip' => 'The :attribute must be a valid IP address.',
     'ipv4' => 'The :attribute must be a valid IPv4 address.',
     'ipv6' => 'The :attribute must be a valid IPv6 address.',
     'json' => 'The :attribute must be a valid JSON string.',
     'lt' => [
         'numeric' => 'The :attribute must be less than :value.',
         'file' => 'The :attribute must be less than :value kilobytes.',
         'string' => 'The :attribute must be less than :value characters.',
         'array' => 'The :attribute must have less than :value items.',
     ],
     'lte' => [
         'numeric' => 'The :attribute must be less than or equal :value.',
         'file' => 'The :attribute must be less than or equal :value kilobytes.',
         'string' => 'The :attribute must be less than or equal :value characters.',
         'array' => 'The :attribute must not have more than :value items.',
     ],
     'max' => [
         'numeric' => 'The :attribute may not be greater than :max.',
         'file' => 'The :attribute may not be greater than :max kilobytes.',
         'string' => 'The :attribute may not be greater than :max characters.',
         'array' => 'The :attribute may not have more than :max items.',
     ],
     'mimes' => 'The :attribute must be a file of type: :values.',
     'mimetypes' => 'The :attribute must be a file of type: :values.',
     'min' => [
         'numeric' => 'The :attribute must be at least :min.',
         'file' => 'The :attribute must be at least :min kilobytes.',
         'string' => 'The :attribute must be at least :min characters.',
         'array' => 'The :attribute must have at least :min items.',
     ],
     'not_in' => 'The selected :attribute is invalid.',
     'not_regex' => 'The :attribute format is invalid.',
     'numeric' => 'The :attribute must be a number.',
     'present' => 'The :attribute field must be present.',
     'regex' => 'The :attribute format is invalid.',
     'required' => 'The :attribute field is required.',
     'required_if' => 'The :attribute field is required when :other is :value.',
     'required_unless' => 'The :attribute field is required unless :other is in :values.',
     'required_with' => 'The :attribute field is required when :values is present.',
     'required_with_all' => 'The :attribute field is required when :values are present.',
     'required_without' => 'The :attribute field is required when :values is not present.',
     'required_without_all' => 'The :attribute field is required when none of :values are present.',
     'same' => 'The :attribute and :other must match.',
     'size' => [
         'numeric' => 'The :attribute must be :size.',
         'file' => 'The :attribute must be :size kilobytes.',
         'string' => 'The :attribute must be :size characters.',
         'array' => 'The :attribute must contain :size items.',
     ],
     'starts_with' => 'The :attribute must start with one of the following: :values',
     'string' => 'The :attribute must be a string.',
     'timezone' => 'The :attribute must be a valid zone.',
     'unique' => 'The :attribute has already been taken.',
     'uploaded' => 'The :attribute failed to upload.',
     'url' => 'The :attribute format is invalid.',
     'uuid' => 'The :attribute must be a valid UUID.',
 
     '2fareq' => 'Second factor code is required.',
     '2fainvalid' => 'Second factor code is invalid.',
     'emailinvalid' => 'The specified email address is invalid.',
     'domaininvalid' => 'The specified domain is invalid.',
     'domainnotavailable' => 'The specified domain is not available.',
     'logininvalid' => 'The specified login is invalid.',
     'loginexists' => 'The specified login is not available.',
     'domainexists' => 'The specified domain is not available.',
     'noemailorphone' => 'The specified text is neither a valid email address nor a phone number.',
     'packageinvalid' => 'Invalid package selected.',
     'packagerequired' => 'Package is required.',
     'usernotexists' => 'Unable to find user.',
     'voucherinvalid' => 'The voucher code is invalid or expired.',
     'noextemail' => 'This user has no external email address.',
     'entryinvalid' => 'The specified :attribute is invalid.',
     'entryexists' => 'The specified :attribute is not available.',
     'minamount' => 'Minimum amount for a single payment is :amount.',
     'minamountdebt' => 'The specified amount does not cover the balance on the account.',
     'notalocaluser' => 'The specified email address does not exist.',
     'memberislist' => 'A recipient cannot be the same as the list address.',
     'listmembersrequired' => 'At least one recipient is required.',
+    'spf-entry-invalid' => 'The entry format is invalid. Expected a domain name starting with a dot.',
+    'invalid-config-parameter' => 'The requested configuration parameter is not supported.',
 
     /*
     |--------------------------------------------------------------------------
     | Custom Validation Language Lines
     |--------------------------------------------------------------------------
     |
     | Here you may specify custom validation messages for attributes using the
     | convention "attribute.rule" to name the lines. This makes it quick to
     | specify a specific custom language line for a given attribute rule.
     |
     */
 
     'custom' => [
         'attribute-name' => [
             'rule-name' => 'custom-message',
         ],
     ],
 
     /*
     |--------------------------------------------------------------------------
     | Custom Validation Attributes
     |--------------------------------------------------------------------------
     |
     | The following language lines are used to swap our attribute placeholder
     | with something more reader friendly such as "E-Mail Address" instead
     | of "email". This simply helps us make our message more expressive.
     |
     */
 
     'attributes' => [],
 ];
diff --git a/src/resources/themes/app.scss b/src/resources/themes/app.scss
index 61bfaaf6..29968ff6 100644
--- a/src/resources/themes/app.scss
+++ b/src/resources/themes/app.scss
@@ -1,471 +1,451 @@
 html,
 body,
 body > .outer-container {
     height: 100%;
 }
 
 #app {
     display: flex;
     flex-direction: column;
     min-height: 100%;
     overflow: hidden;
 
     & > nav {
         flex-shrink: 0;
         z-index: 12;
     }
 
     & > div.container {
         flex-grow: 1;
         margin-top: 2rem;
         margin-bottom: 2rem;
     }
 
     & > .filler {
         flex-grow: 1;
     }
 
     & > div.container + .filler {
         display: none;
     }
 }
 
 .error-page {
     position: absolute;
     top: 0;
     height: 100%;
     width: 100%;
     align-content: center;
     align-items: center;
     display: flex;
     flex-wrap: wrap;
     justify-content: center;
     color: #636b6f;
     z-index: 10;
     background: white;
 
     .code {
         text-align: right;
         border-right: 2px solid;
         font-size: 26px;
         padding: 0 15px;
     }
 
     .message {
         font-size: 18px;
         padding: 0 15px;
     }
 
     .hint {
         margin-top: 3em;
         text-align: center;
         width: 100%;
     }
 }
 
 .app-loader {
     background-color: $body-bg;
     height: 100%;
     width: 100%;
     position: absolute;
     top: 0;
     left: 0;
     display: flex;
     align-items: center;
     justify-content: center;
     z-index: 8;
 
     .spinner-border {
         width: 120px;
         height: 120px;
         border-width: 15px;
         color: #b2aa99;
     }
 
     &.small .spinner-border {
         width: 25px;
         height: 25px;
         border-width: 3px;
     }
 
     &.fadeOut {
         visibility: hidden;
         opacity: 0;
         transition: visibility 300ms linear, opacity 300ms linear;
     }
 }
 
 pre {
     margin: 1rem 0;
     padding: 1rem;
     background-color: $menu-bg-color;
 }
 
 .card-title {
     font-size: 1.2rem;
     font-weight: bold;
 }
 
 tfoot.table-fake-body {
     background-color: #f8f8f8;
     color: grey;
     text-align: center;
 
     td {
         vertical-align: middle;
         height: 8em;
         border: 0;
     }
 
     tbody:not(:empty) + & {
         display: none;
     }
 }
 
 table {
     th {
         white-space: nowrap;
     }
 
     td.email,
     td.price,
     td.datetime,
     td.selection {
         width: 1%;
         white-space: nowrap;
     }
 
     td.buttons,
     th.price,
     td.price {
         width: 1%;
         text-align: right;
         white-space: nowrap;
     }
 
     &.form-list {
         margin: 0;
 
         td {
             border: 0;
 
             &:first-child {
                 padding-left: 0;
             }
 
             &:last-child {
                 padding-right: 0;
             }
         }
 
         button {
             line-height: 1;
         }
     }
 
     .btn-action {
         line-height: 1;
         padding: 0;
     }
 }
 
 .list-details {
     min-height: 1em;
 
     & > ul {
         margin: 0;
         padding-left: 1.2em;
     }
 }
 
 .plan-selector {
     .plan-header {
         display: flex;
     }
 
     .plan-ico {
         margin:auto;
         font-size: 3.8rem;
         color: #f1a539;
         border: 3px solid #f1a539;
         width: 6rem;
         height: 6rem;
         border-radius: 50%;
     }
 }
 
 .status-message {
     display: flex;
     align-items: center;
     justify-content: center;
 
     .app-loader {
         width: auto;
         position: initial;
 
         .spinner-border {
             color: $body-color;
         }
     }
 
     svg {
         font-size: 1.5em;
     }
 
     :first-child {
         margin-right: 0.4em;
     }
 }
 
 .form-separator {
     position: relative;
     margin: 1em 0;
     display: flex;
     justify-content: center;
 
     hr {
         border-color: #999;
         margin: 0;
         position: absolute;
         top: 0.75em;
         width: 100%;
     }
 
     span {
         background: #fff;
         padding: 0 1em;
         z-index: 1;
     }
 }
 
 #status-box {
     background-color: lighten($green, 35);
 
     .progress {
         background-color: #fff;
         height: 10px;
     }
 
     .progress-label {
         font-size: 0.9em;
     }
 
     .progress-bar {
         background-color: $green;
     }
 
     &.process-failed {
         background-color: lighten($orange, 30);
 
         .progress-bar {
             background-color: $red;
         }
     }
 }
 
 @keyframes blinker {
     50% {
         opacity: 0;
     }
 }
 
 .blinker {
     animation: blinker 750ms step-start infinite;
 }
 
 #dashboard-nav {
     display: flex;
     flex-wrap: wrap;
     justify-content: center;
 
     & > a {
         padding: 1rem;
         text-align: center;
         white-space: nowrap;
         margin: 0.25rem;
         text-decoration: none;
         width: 150px;
 
         &.disabled {
             pointer-events: none;
             opacity: 0.6;
         }
 
         // Some icons are too big, scale them down
         &.link-invitations {
             svg {
                 transform: scale(0.9);
             }
         }
 
         .badge {
             position: absolute;
             top: 0.5rem;
             right: 0.5rem;
         }
     }
 
     svg {
         width: 6rem;
         height: 6rem;
         margin: auto;
     }
 }
 
 #payment-method-selection {
     display: flex;
     flex-wrap: wrap;
     justify-content: center;
 
     & > a {
         padding: 1rem;
         text-align: center;
         white-space: nowrap;
         margin: 0.25rem;
         text-decoration: none;
         width: 150px;
     }
 
     svg {
         width: 6rem;
         height: 6rem;
         margin: auto;
     }
 }
 
 #logon-form {
     flex-basis: auto; // Bootstrap issue? See logon page with width < 992
 }
 
 #logon-form-footer {
     a:not(:first-child) {
         margin-left: 2em;
     }
 }
 
 // Various improvements for mobile
 @include media-breakpoint-down(sm) {
     .card,
     .card-footer {
         border: 0;
     }
 
     .card-body {
         padding: 0.5rem 0;
     }
 
-    .form-group {
-        margin-bottom: 0.5rem;
-    }
-
     .nav-tabs {
         flex-wrap: nowrap;
-        overflow-x: auto;
 
         .nav-link {
             white-space: nowrap;
             padding: 0.5rem 0.75rem;
         }
     }
 
-    .tab-content {
-        margin-top: 0.5rem;
-    }
-
-    .col-form-label {
-        color: #666;
-        font-size: 95%;
-    }
-
-    .form-group.plaintext .col-form-label {
-        padding-bottom: 0;
-    }
-
-    form.read-only.short label {
-        width: 35%;
-
-        & + * {
-            width: 65%;
-        }
-    }
-
     #app > div.container {
         margin-bottom: 1rem;
         margin-top: 1rem;
         max-width: 100%;
     }
 
     #header-menu-navbar {
         padding: 0;
     }
 
     #dashboard-nav > a {
         width: 135px;
     }
 
     .table-sm:not(.form-list) {
         tbody td {
             padding: 0.75rem 0.5rem;
 
             svg {
                 vertical-align: -0.175em;
             }
 
             & > svg {
                 font-size: 125%;
                 margin-right: 0.25rem;
             }
         }
     }
 
     .table.transactions {
         thead {
             display: none;
         }
 
         tbody {
             tr {
                 position: relative;
                 display: flex;
                 flex-wrap: wrap;
             }
 
             td {
                 width: auto;
                 border: 0;
                 padding: 0.5rem;
 
                 &.datetime {
                     width: 50%;
                     padding-left: 0;
                 }
 
                 &.description {
                     order: 3;
                     width: 100%;
                     border-bottom: 1px solid $border-color;
                     color: $secondary;
                     padding: 0 1.5em 0.5rem 0;
                     margin-top: -0.25em;
                 }
 
                 &.selection {
                     position: absolute;
                     right: 0;
                     border: 0;
                     top: 1.7em;
                     padding-right: 0;
                 }
 
                 &.price {
                     width: 50%;
                     padding-right: 0;
                 }
 
                 &.email {
                     display: none;
                 }
             }
         }
     }
 }
+
+@include media-breakpoint-down(sm) {
+    .tab-pane > .card-body {
+        padding: 0.5rem;
+    }
+}
diff --git a/src/resources/themes/forms.scss b/src/resources/themes/forms.scss
index f8bd1d75..0f755350 100644
--- a/src/resources/themes/forms.scss
+++ b/src/resources/themes/forms.scss
@@ -1,77 +1,122 @@
 .list-input {
     & > div {
         &:not(:last-child) {
             margin-bottom: -1px;
 
             input,
             a.btn {
                 border-bottom-right-radius: 0;
                 border-bottom-left-radius: 0;
             }
         }
 
         &:not(:first-child) {
             input,
             a.btn {
                 border-top-right-radius: 0;
                 border-top-left-radius: 0;
             }
         }
     }
 
     input.is-invalid {
         z-index: 2;
     }
 
     .btn svg {
         vertical-align: middle;
     }
 }
 
 .range-input {
     display: flex;
 
     label {
         margin-right: 0.5em;
     }
 }
 
 .input-group-activable {
     &.active {
         :not(.input-group-append):not(.activable) {
             display: none;
         }
     }
 
     &:not(.active) {
         .activable {
             display: none;
         }
     }
 
     // Label is always visible
     .label {
         color: $body-color;
         display: initial !important;
     }
 
     .input-group-text {
         border-color: transparent;
         background: transparent;
         padding-left: 0;
 
         &:not(.label) {
             flex: 1;
         }
     }
 }
 
 .form-control-plaintext .btn-sm {
     margin-top: -0.25rem;
 }
 
 form.read-only {
     .row {
         margin-bottom: 0;
     }
 }
+
+// Various improvements for mobile
+@include media-breakpoint-down(sm) {
+    .form-group {
+        margin-bottom: 0.5rem;
+    }
+
+    .form-group.plaintext .col-form-label {
+        padding-bottom: 0;
+    }
+
+    form.read-only.short label {
+        width: 35%;
+
+        & + * {
+            width: 65%;
+        }
+    }
+}
+
+@include media-breakpoint-down(xs) {
+    .col-form-label {
+        color: #666;
+        font-size: 95%;
+    }
+
+    .form-group.checkbox {
+        position: relative;
+
+        & > div {
+            position: initial;
+            padding-top: 0 !important;
+
+            input {
+                position: absolute;
+                top: 0.5rem;
+                right: 1rem;
+            }
+        }
+
+        label {
+            padding-right: 2.5rem;
+        }
+    }
+}
diff --git a/src/resources/vue/Admin/Domain.vue b/src/resources/vue/Admin/Domain.vue
index c50d65a6..755b4a95 100644
--- a/src/resources/vue/Admin/Domain.vue
+++ b/src/resources/vue/Admin/Domain.vue
@@ -1,97 +1,118 @@
 <template>
     <div v-if="domain" class="container">
         <div class="card" id="domain-info">
             <div class="card-body">
                 <div class="card-title">{{ domain.namespace }}</div>
                 <div class="card-text">
                     <form class="read-only short">
                         <div class="form-group row">
                             <label for="domainid" class="col-sm-4 col-form-label">
                                 {{ $t('form.id') }} <span class="text-muted">({{ $t('form.created') }})</span>
                             </label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="domainid">
                                     {{ domain.id }} <span class="text-muted">({{ domain.created_at }})</span>
                                 </span>
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="first_name" class="col-sm-4 col-form-label">{{ $t('form.status') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="status">
                                     <span :class="$root.domainStatusClass(domain)">{{ $root.domainStatusText(domain) }}</span>
                                 </span>
                             </div>
                         </div>
                     </form>
                     <div class="mt-2">
                         <button v-if="!domain.isSuspended" id="button-suspend" class="btn btn-warning" type="button" @click="suspendDomain">
                             {{ $t('btn.suspend') }}
                         </button>
                         <button v-if="domain.isSuspended" id="button-unsuspend" class="btn btn-warning" type="button" @click="unsuspendDomain">
                             {{ $t('btn.unsuspend') }}
                         </button>
                     </div>
                 </div>
             </div>
         </div>
         <ul class="nav nav-tabs mt-3" role="tablist">
             <li class="nav-item">
-                <a class="nav-link active" id="tab-config" href="#domain-config" role="tab" aria-controls="domain-config" aria-selected="true">
+                <a class="nav-link active" id="tab-config" href="#domain-config" role="tab" aria-controls="domain-config" aria-selected="true" @click="$root.tab">
                     {{ $t('form.config') }}
                 </a>
             </li>
+            <li class="nav-item">
+                <a class="nav-link" id="tab-settings" href="#domain-settings" role="tab" aria-controls="domain-settings" aria-selected="false" @click="$root.tab">
+                    {{ $t('form.settings') }}
+                </a>
+            </li>
         </ul>
         <div class="tab-content">
             <div class="tab-pane show active" id="domain-config" role="tabpanel" aria-labelledby="tab-config">
                 <div class="card-body">
                     <div class="card-text">
                         <p>{{ $t('domain.dns-verify') }}</p>
                         <p><pre id="dns-verify">{{ domain.dns.join("\n") }}</pre></p>
                         <p>{{ $t('domain.dns-config') }}</p>
-                        <p><pre id="dns-config">{{ domain.config.join("\n") }}</pre></p>
+                        <p><pre id="dns-config">{{ domain.mx.join("\n") }}</pre></p>
+                    </div>
+                </div>
+            </div>
+            <div class="tab-pane" id="domain-settings" role="tabpanel" aria-labelledby="tab-settings">
+                <div class="card-body">
+                    <div class="card-text">
+                        <form class="read-only short">
+                            <div class="form-group row plaintext">
+                                <label for="spf_whitelist" class="col-sm-4 col-form-label">{{ $t('domain.spf-whitelist') }}</label>
+                                <div class="col-sm-8">
+                                    <span class="form-control-plaintext" id="spf_whitelist">
+                                        {{ domain.config && domain.config.spf_whitelist.length ? domain.config.spf_whitelist.join(', ') : 'none' }}
+                                    </span>
+                                </div>
+                            </div>
+                        </form>
                     </div>
                 </div>
             </div>
         </div>
     </div>
 </template>
 
 <script>
     export default {
         data() {
             return {
                 domain: null
             }
         },
         created() {
             const domain_id = this.$route.params.domain;
 
             axios.get('/api/v4/domains/' + domain_id)
                 .then(response => {
                     this.domain = response.data
                 })
                 .catch(this.$root.errorHandler)
         },
         methods: {
             suspendDomain() {
                 axios.post('/api/v4/domains/' + this.domain.id + '/suspend', {})
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.$toast.success(response.data.message)
                             this.domain = Object.assign({}, this.domain, { isSuspended: true })
                         }
                     })
             },
             unsuspendDomain() {
                 axios.post('/api/v4/domains/' + this.domain.id + '/unsuspend', {})
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.$toast.success(response.data.message)
                             this.domain = Object.assign({}, this.domain, { isSuspended: false })
                         }
                     })
             }
         }
     }
 </script>
diff --git a/src/resources/vue/Admin/User.vue b/src/resources/vue/Admin/User.vue
index cff26837..44f77e72 100644
--- a/src/resources/vue/Admin/User.vue
+++ b/src/resources/vue/Admin/User.vue
@@ -1,705 +1,725 @@
 <template>
     <div class="container">
         <div class="card" id="user-info">
             <div class="card-body">
                 <h1 class="card-title">{{ user.email }}</h1>
                 <div class="card-text">
                     <form class="read-only short">
                         <div v-if="user.wallet.user_id != user.id" class="form-group row plaintext">
                             <label for="manager" class="col-sm-4 col-form-label">{{ $t('user.managed-by') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="manager">
                                     <router-link :to="{ path: '/user/' + user.wallet.user_id }">{{ user.wallet.user_email }}</router-link>
                                 </span>
                             </div>
                         </div>
                         <div class="form-group row plaintext">
                             <label for="userid" class="col-sm-4 col-form-label">ID <span class="text-muted">({{ $t('form.created') }})</span></label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="userid">
                                     {{ user.id }} <span class="text-muted">({{ user.created_at }})</span>
                                 </span>
                             </div>
                         </div>
                         <div class="form-group row plaintext">
                             <label for="status" class="col-sm-4 col-form-label">{{ $t('form.status') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="status">
                                     <span :class="$root.userStatusClass(user)">{{ $root.userStatusText(user) }}</span>
                                 </span>
                             </div>
                         </div>
                         <div class="form-group row plaintext" v-if="user.first_name">
                             <label for="first_name" class="col-sm-4 col-form-label">{{ $t('form.firstname') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="first_name">{{ user.first_name }}</span>
                             </div>
                         </div>
                         <div class="form-group row plaintext" v-if="user.last_name">
                             <label for="last_name" class="col-sm-4 col-form-label">{{ $t('form.lastname') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="last_name">{{ user.last_name }}</span>
                             </div>
                         </div>
                         <div class="form-group row plaintext" v-if="user.organization">
                             <label for="organization" class="col-sm-4 col-form-label">{{ $t('user.org') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="organization">{{ user.organization }}</span>
                             </div>
                         </div>
                         <div class="form-group row plaintext" v-if="user.phone">
                             <label for="phone" class="col-sm-4 col-form-label">{{ $t('form.phone') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="phone">{{ user.phone }}</span>
                             </div>
                         </div>
                         <div class="form-group row plaintext">
                             <label for="external_email" class="col-sm-4 col-form-label">{{ $t('user.ext-email') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="external_email">
                                     <a v-if="user.external_email" :href="'mailto:' + user.external_email">{{ user.external_email }}</a>
                                     <button type="button" class="btn btn-secondary btn-sm" @click="emailEdit">{{ $t('btn.edit') }}</button>
                                 </span>
                             </div>
                         </div>
                         <div class="form-group row plaintext" v-if="user.billing_address">
                             <label for="billing_address" class="col-sm-4 col-form-label">{{ $t('user.address') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" style="white-space:pre" id="billing_address">{{ user.billing_address }}</span>
                             </div>
                         </div>
                         <div class="form-group row plaintext">
                             <label for="country" class="col-sm-4 col-form-label">{{ $t('user.country') }}</label>
                             <div class="col-sm-8">
                                 <span class="form-control-plaintext" id="country">{{ user.country }}</span>
                             </div>
                         </div>
                     </form>
                     <div class="mt-2">
                         <button v-if="!user.isSuspended" id="button-suspend" class="btn btn-warning" type="button" @click="suspendUser">
                             {{ $t('btn.suspend') }}
                         </button>
                         <button v-if="user.isSuspended" id="button-unsuspend" class="btn btn-warning" type="button" @click="unsuspendUser">
                             {{ $t('btn.unsuspend') }}
                         </button>
                     </div>
                 </div>
             </div>
         </div>
         <ul class="nav nav-tabs mt-3" role="tablist">
             <li class="nav-item">
                 <a class="nav-link active" id="tab-finances" href="#user-finances" role="tab" aria-controls="user-finances" aria-selected="true">
                     {{ $t('user.finances') }}
                 </a>
             </li>
             <li class="nav-item">
                 <a class="nav-link" id="tab-aliases" href="#user-aliases" role="tab" aria-controls="user-aliases" aria-selected="false">
                     {{ $t('user.aliases') }} ({{ user.aliases.length }})
                 </a>
             </li>
             <li class="nav-item">
                 <a class="nav-link" id="tab-subscriptions" href="#user-subscriptions" role="tab" aria-controls="user-subscriptions" aria-selected="false">
                     {{ $t('user.subscriptions') }} ({{ skus.length }})
                 </a>
             </li>
             <li class="nav-item">
                 <a class="nav-link" id="tab-domains" href="#user-domains" role="tab" aria-controls="user-domains" aria-selected="false">
                     {{ $t('user.domains') }} ({{ domains.length }})
                 </a>
             </li>
             <li class="nav-item">
                 <a class="nav-link" id="tab-users" href="#user-users" role="tab" aria-controls="user-users" aria-selected="false">
                     {{ $t('user.users') }} ({{ users.length }})
                 </a>
             </li>
             <li class="nav-item">
                 <a class="nav-link" id="tab-distlists" href="#user-distlists" role="tab" aria-controls="user-distlists" aria-selected="false">
                     {{ $t('user.distlists') }} ({{ distlists.length }})
                 </a>
             </li>
+            <li class="nav-item">
+                <a class="nav-link" id="tab-settings" href="#user-settings" role="tab" aria-controls="user-settings" aria-selected="false">
+                    {{ $t('form.settings') }}
+                </a>
+            </li>
         </ul>
         <div class="tab-content">
             <div class="tab-pane show active" id="user-finances" role="tabpanel" aria-labelledby="tab-finances">
                 <div class="card-body">
                     <h2 class="card-title">
                         {{ $t('wallet.title') }}
                         <span :class="wallet.balance < 0 ? 'text-danger' : 'text-success'"><strong>{{ $root.price(wallet.balance) }}</strong></span>
                     </h2>
                     <div class="card-text">
                         <form class="read-only short">
                             <div class="form-group row">
                                 <label class="col-sm-4 col-form-label">{{ $t('user.discount') }}</label>
                                 <div class="col-sm-8">
                                     <span class="form-control-plaintext" id="discount">
                                         <span>{{ wallet.discount ? (wallet.discount + '% - ' + wallet.discount_description) : 'none' }}</span>
                                         <button type="button" class="btn btn-secondary btn-sm" @click="discountEdit">{{ $t('btn.edit') }}</button>
                                     </span>
                                 </div>
                             </div>
                             <div class="form-group row" v-if="wallet.mandate && wallet.mandate.id">
                                 <label class="col-sm-4 col-form-label">{{ $t('user.auto-payment') }}</label>
                                 <div class="col-sm-8">
                                     <span id="autopayment" :class="'form-control-plaintext' + (wallet.mandateState ? ' text-danger' : '')"
                                           v-html="$t('user.auto-payment-text', {
                                               amount: wallet.mandate.amount,
                                               balance: wallet.mandate.balance,
                                               method: wallet.mandate.method
                                           })"
                                     >
                                         <span v-if="wallet.mandateState">({{ wallet.mandateState }})</span>.
                                     </span>
                                 </div>
                             </div>
                             <div class="form-group row" v-if="wallet.providerLink">
                                 <label class="col-sm-4 col-form-label">{{ capitalize(wallet.provider) }} {{ $t('form.id') }}</label>
                                 <div class="col-sm-8">
                                     <span class="form-control-plaintext" v-html="wallet.providerLink"></span>
                                 </div>
                             </div>
                         </form>
                         <div class="mt-2">
                             <button id="button-award" class="btn btn-success" type="button" @click="awardDialog">{{ $t('user.add-bonus') }}</button>
                             <button id="button-penalty" class="btn btn-danger" type="button" @click="penalizeDialog">{{ $t('user.add-penalty') }}</button>
                         </div>
                     </div>
                     <h2 class="card-title mt-4">{{ $t('wallet.transactions') }}</h2>
                     <transaction-log v-if="wallet.id && !walletReload" class="card-text" :wallet-id="wallet.id" :is-admin="true"></transaction-log>
                 </div>
             </div>
             <div class="tab-pane" id="user-aliases" role="tabpanel" aria-labelledby="tab-aliases">
                 <div class="card-body">
                     <div class="card-text">
                         <table class="table table-sm table-hover">
                             <thead class="thead-light">
                                 <tr>
                                     <th scope="col">{{ $t('form.email') }}</th>
                                 </tr>
                             </thead>
                             <tbody>
                                 <tr v-for="(alias, index) in user.aliases" :id="'alias' + index" :key="index">
                                     <td>{{ alias }}</td>
                                 </tr>
                             </tbody>
                             <tfoot class="table-fake-body">
                                 <tr>
                                     <td>{{ $t('user.aliases-none') }}</td>
                                 </tr>
                             </tfoot>
                         </table>
                     </div>
                 </div>
             </div>
             <div class="tab-pane" id="user-subscriptions" role="tabpanel" aria-labelledby="tab-subscriptions">
                 <div class="card-body">
                     <div class="card-text">
                         <table class="table table-sm table-hover mb-0">
                             <thead class="thead-light">
                                 <tr>
                                     <th scope="col">{{ $t('user.subscription') }}</th>
                                     <th scope="col">{{ $t('user.price') }}</th>
                                 </tr>
                             </thead>
                             <tbody>
                                 <tr v-for="(sku, sku_id) in skus" :id="'sku' + sku.id" :key="sku_id">
                                     <td>{{ sku.name }}</td>
                                     <td>{{ sku.price }}</td>
                                 </tr>
                             </tbody>
                             <tfoot class="table-fake-body">
                                 <tr>
                                     <td colspan="2">{{ $t('user.subscriptions-none') }}</td>
                                 </tr>
                             </tfoot>
                         </table>
                         <small v-if="discount > 0" class="hint">
                             <hr class="m-0">
                             &sup1; {{ $t('user.discount-hint') }}: {{ discount }}% - {{ discount_description }}
                         </small>
                         <div class="mt-2">
                             <button type="button" class="btn btn-danger" id="reset2fa" v-if="has2FA" @click="reset2FADialog">
                                 {{ $t('user.reset-2fa') }}
                             </button>
                         </div>
                     </div>
                 </div>
             </div>
             <div class="tab-pane" id="user-domains" role="tabpanel" aria-labelledby="tab-domains">
                 <div class="card-body">
                     <div class="card-text">
                         <table class="table table-sm table-hover">
                             <thead class="thead-light">
                                 <tr>
                                     <th scope="col">{{ $t('domain.namespace') }}</th>
                                 </tr>
                             </thead>
                             <tbody>
                                 <tr v-for="domain in domains" :id="'domain' + domain.id" :key="domain.id" @click="$root.clickRecord">
                                     <td>
                                         <svg-icon icon="globe" :class="$root.domainStatusClass(domain)" :title="$root.domainStatusText(domain)"></svg-icon>
                                         <router-link :to="{ path: '/domain/' + domain.id }">{{ domain.namespace }}</router-link>
                                     </td>
                                 </tr>
                             </tbody>
                             <tfoot class="table-fake-body">
                                 <tr>
                                     <td>{{ $t('user.domains-none') }}</td>
                                 </tr>
                             </tfoot>
                         </table>
                     </div>
                 </div>
             </div>
             <div class="tab-pane" id="user-users" role="tabpanel" aria-labelledby="tab-users">
                 <div class="card-body">
                     <div class="card-text">
                         <table class="table table-sm table-hover">
                             <thead class="thead-light">
                                 <tr>
                                     <th scope="col">{{ $t('form.primary-email') }}</th>
                                 </tr>
                             </thead>
                             <tbody>
                                 <tr v-for="item in users" :id="'user' + item.id" :key="item.id" @click="$root.clickRecord">
                                     <td>
                                         <svg-icon icon="user" :class="$root.userStatusClass(item)" :title="$root.userStatusText(item)"></svg-icon>
                                         <router-link v-if="item.id != user.id" :to="{ path: '/user/' + item.id }">{{ item.email }}</router-link>
                                         <span v-else>{{ item.email }}</span>
                                     </td>
                                 </tr>
                             </tbody>
                             <tfoot class="table-fake-body">
                                 <tr>
                                     <td>{{ $t('user.users-none') }}</td>
                                 </tr>
                             </tfoot>
                         </table>
                     </div>
                 </div>
             </div>
             <div class="tab-pane" id="user-distlists" role="tabpanel" aria-labelledby="tab-distlists">
                 <div class="card-body">
                     <div class="card-text">
                         <table class="table table-sm table-hover">
                             <thead class="thead-light">
                                 <tr>
                                     <th scope="col">{{ $t('form.email') }}</th>
                                 </tr>
                             </thead>
                             <tbody>
                                 <tr v-for="list in distlists" :key="list.id" @click="$root.clickRecord">
                                     <td>
                                         <svg-icon icon="users" :class="$root.distlistStatusClass(list)" :title="$root.distlistStatusText(list)"></svg-icon>
                                         <router-link :to="{ path: '/distlist/' + list.id }">{{ list.email }}</router-link>
                                     </td>
                                 </tr>
                             </tbody>
                             <tfoot class="table-fake-body">
                                 <tr>
                                     <td>{{ $t('user.distlists-none') }}</td>
                                 </tr>
                             </tfoot>
                         </table>
                     </div>
                 </div>
             </div>
+            <div class="tab-pane" id="user-settings" role="tabpanel" aria-labelledby="tab-settings">
+                <div class="card-body">
+                    <div class="card-text">
+                        <form class="read-only short">
+                            <div class="form-group row plaintext">
+                                <label for="greylisting" class="col-sm-4 col-form-label">{{ $t('user.greylisting') }}</label>
+                                <div class="col-sm-8">
+                                    <span class="form-control-plaintext" id="greylisting">
+                                        <span v-if="user.config.greylisting" class="text-success">{{ $t('form.enabled') }}</span>
+                                        <span v-else class="text-danger">{{ $t('form.disabled') }}</span>
+                                    </span>
+                                </div>
+                            </div>
+                        </form>
+                    </div>
+                </div>
+            </div>
         </div>
 
         <div id="discount-dialog" class="modal" tabindex="-1" role="dialog">
             <div class="modal-dialog" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
                         <h5 class="modal-title">{{ $t('user.discount-title') }}</h5>
                         <button type="button" class="close" data-dismiss="modal" :aria-label="$t('btn.close')">
                             <span aria-hidden="true">&times;</span>
                         </button>
                     </div>
                     <div class="modal-body">
                         <p class="form-group">
                             <select v-model="wallet.discount_id" class="custom-select">
                                 <option value="">- {{ $t('form.none') }} -</option>
                                 <option v-for="item in discounts" :value="item.id" :key="item.id">{{ item.label }}</option>
                             </select>
                         </p>
                     </div>
                     <div class="modal-footer">
                         <button type="button" class="btn btn-secondary modal-cancel" data-dismiss="modal">{{ $t('btn.cancel') }}</button>
                         <button type="button" class="btn btn-primary modal-action" @click="submitDiscount()">
                             <svg-icon icon="check"></svg-icon> {{ $t('btn.submit') }}
                         </button>
                     </div>
                 </div>
             </div>
         </div>
 
         <div id="email-dialog" class="modal" tabindex="-1" role="dialog">
             <div class="modal-dialog" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
                         <h5 class="modal-title">{{ $t('user.ext-email') }}</h5>
                         <button type="button" class="close" data-dismiss="modal" :aria-label="$t('btn.close')">
                             <span aria-hidden="true">&times;</span>
                         </button>
                     </div>
                     <div class="modal-body">
                         <p class="form-group">
                             <input v-model="external_email" name="external_email" class="form-control">
                         </p>
                     </div>
                     <div class="modal-footer">
                         <button type="button" class="btn btn-secondary modal-cancel" data-dismiss="modal">{{ $t('btn.cancel') }}</button>
                         <button type="button" class="btn btn-primary modal-action" @click="submitEmail()">
                             <svg-icon icon="check"></svg-icon> {{ $t('btn.submit') }}
                         </button>
                     </div>
                 </div>
             </div>
         </div>
 
         <div id="oneoff-dialog" class="modal" tabindex="-1" role="dialog">
             <div class="modal-dialog" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
                         <h5 class="modal-title">{{ $t(oneoff_negative ? 'user.add-penalty-title' : 'user.add-bonus-title') }}</h5>
                         <button type="button" class="close" data-dismiss="modal" :aria-label="$t('btn.close')">
                             <span aria-hidden="true">&times;</span>
                         </button>
                     </div>
                     <div class="modal-body">
                         <form data-validation-prefix="oneoff_">
                             <div class="form-group">
                                 <label for="oneoff_amount" class="col-form-label">{{ $t('form.amount') }}</label>
                                 <div class="input-group">
                                     <input type="text" class="form-control" id="oneoff_amount" v-model="oneoff_amount" required>
                                     <span class="input-group-append">
                                         <span class="input-group-text">{{ oneoff_currency }}</span>
                                     </span>
                                 </div>
                             </div>
                             <div class="form-group">
                                 <label for="oneoff_description" class="col-form-label">{{ $t('form.description') }}</label>
                                 <input class="form-control" id="oneoff_description" v-model="oneoff_description" required>
                             </div>
                         </form>
                     </div>
                     <div class="modal-footer">
                         <button type="button" class="btn btn-secondary modal-cancel" data-dismiss="modal">{{ $t('btn.cancel') }}</button>
                         <button type="button" class="btn btn-primary modal-action" @click="submitOneOff()">
                             <svg-icon icon="check"></svg-icon> {{ $t('btn.submit') }}
                         </button>
                     </div>
                 </div>
             </div>
         </div>
 
         <div id="reset-2fa-dialog" class="modal" tabindex="-1" role="dialog">
             <div class="modal-dialog" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
                         <h5 class="modal-title">{{ $t('user.reset-2fa-title') }}</h5>
                         <button type="button" class="close" data-dismiss="modal" :aria-label="$t('btn.close')">
                             <span aria-hidden="true">&times;</span>
                         </button>
                     </div>
                     <div class="modal-body">
                         <p>{{ $t('user.2fa-hint1') }}</p>
                         <p>{{ $t('user.2fa-hint2') }}</p>
                     </div>
                     <div class="modal-footer">
                         <button type="button" class="btn btn-secondary modal-cancel" data-dismiss="modal">{{ $t('btn.cancel') }}</button>
                         <button type="button" class="btn btn-danger modal-action" @click="reset2FA()">{{ $t('btn.reset') }}</button>
                     </div>
                 </div>
             </div>
         </div>
     </div>
 </template>
 
 <script>
     import TransactionLog from '../Widgets/TransactionLog'
 
     export default {
         components: {
             TransactionLog
         },
         beforeRouteUpdate (to, from, next) {
             // An event called when the route that renders this component has changed,
             // but this component is reused in the new route.
             // Required to handle links from /user/XXX to /user/YYY
             next()
             this.$parent.routerReload()
         },
         data() {
             return {
                 oneoff_amount: '',
                 oneoff_currency: 'CHF',
                 oneoff_description: '',
                 oneoff_negative: false,
                 discount: 0,
                 discount_description: '',
                 discounts: [],
                 external_email: '',
                 has2FA: false,
                 wallet: {},
                 walletReload: false,
                 distlists: [],
                 domains: [],
                 skus: [],
                 sku2FA: null,
                 users: [],
                 user: {
                     aliases: [],
+                    config: {},
                     wallet: {},
                     skus: {},
                 }
             }
         },
         created() {
             const user_id = this.$route.params.user
 
             this.$root.startLoading()
 
             axios.get('/api/v4/users/' + user_id)
                 .then(response => {
                     this.$root.stopLoading()
 
                     this.user = response.data
 
                     const financesTab = '#user-finances'
                     const keys = ['first_name', 'last_name', 'external_email', 'billing_address', 'phone', 'organization']
 
                     let country = this.user.settings.country
                     if (country && country in window.config.countries) {
                         country = window.config.countries[country][1]
                     }
 
                     this.user.country = country
 
                     keys.forEach(key => { this.user[key] = this.user.settings[key] })
 
                     this.discount = this.user.wallet.discount
                     this.discount_description = this.user.wallet.discount_description
 
                     // TODO: currencies, multi-wallets, accounts
                     // Get more info about the wallet (e.g. payment provider related)
                     this.$root.addLoader(financesTab)
                     axios.get('/api/v4/wallets/' + this.user.wallets[0].id)
                         .then(response => {
                             this.$root.removeLoader(financesTab)
                             this.wallet = response.data
                             this.setMandateState()
                         })
                         .catch(error => {
                             this.$root.removeLoader(financesTab)
                         })
 
                     // Create subscriptions list
                     axios.get('/api/v4/users/' + user_id + '/skus')
                         .then(response => {
                             // "merge" SKUs with user entitlement-SKUs
                             response.data.forEach(sku => {
                                 const userSku = this.user.skus[sku.id]
                                 if (userSku) {
                                     let cost = userSku.costs.reduce((sum, current) => sum + current)
                                     let item = {
                                         id: sku.id,
                                         name: sku.name,
                                         cost: cost,
                                         price: this.$root.priceLabel(cost, this.discount)
                                     }
 
                                     if (sku.range) {
                                         item.name += ' ' + userSku.count + ' ' + sku.range.unit
                                     }
 
                                     this.skus.push(item)
 
                                     if (sku.handler == 'auth2f') {
                                         this.has2FA = true
                                         this.sku2FA = sku.id
                                     }
                                 }
                             })
                         })
 
                     // Fetch users
                     // TODO: Multiple wallets
                     axios.get('/api/v4/users?owner=' + user_id)
                         .then(response => {
                             this.users = response.data.list;
                         })
 
                     // Fetch domains
                     axios.get('/api/v4/domains?owner=' + user_id)
                         .then(response => {
                             this.domains = response.data.list
                         })
 
                     // Fetch distribution lists
                     axios.get('/api/v4/groups?owner=' + user_id)
                         .then(response => {
                             this.distlists = response.data.list
                         })
                 })
                 .catch(this.$root.errorHandler)
         },
         mounted() {
-            $(this.$el).find('ul.nav-tabs a').on('click', e => {
-                e.preventDefault()
-                $(e.target).tab('show')
-            })
+            $(this.$el).find('ul.nav-tabs a').on('click', this.$root.tab)
         },
         methods: {
             capitalize(str) {
                 return str.charAt(0).toUpperCase() + str.slice(1)
             },
             awardDialog() {
                 this.oneOffDialog(false)
             },
             discountEdit() {
                 $('#discount-dialog')
                     .on('shown.bs.modal', e => {
                         $(e.target).find('select').focus()
                         // Note: Vue v-model is strict, convert null to a string
                         this.wallet.discount_id = this.wallet_discount_id || ''
                     })
                     .modal()
 
                 if (!this.discounts.length) {
                     // Fetch discounts
                     axios.get('/api/v4/discounts')
                         .then(response => {
                             this.discounts = response.data.list
                         })
                 }
             },
             emailEdit() {
                 this.external_email = this.user.external_email
                 this.$root.clearFormValidation($('#email-dialog'))
 
                 $('#email-dialog')
                     .on('shown.bs.modal', e => {
                         $(e.target).find('input').focus()
                     })
                     .modal()
             },
             setMandateState() {
                 let mandate = this.wallet.mandate
                 if (mandate && mandate.id) {
                     if (!mandate.isValid) {
                         this.wallet.mandateState = mandate.isPending ? 'pending' : 'invalid'
                     } else if (mandate.isDisabled) {
                         this.wallet.mandateState = 'disabled'
                     }
                 }
             },
             oneOffDialog(negative) {
                 this.oneoff_negative = negative
                 this.dialog = $('#oneoff-dialog').on('shown.bs.modal', event => {
                     this.$root.clearFormValidation(event.target)
                     $(event.target).find('#oneoff_amount').focus()
                 }).modal()
             },
             penalizeDialog() {
                 this.oneOffDialog(true)
             },
             reload() {
                 // this is to reload transaction log
                 this.walletReload = true
                 this.$nextTick(() => { this.walletReload = false })
             },
             reset2FA() {
                 $('#reset-2fa-dialog').modal('hide')
                 axios.post('/api/v4/users/' + this.user.id + '/reset2FA')
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.$toast.success(response.data.message)
                             this.skus = this.skus.filter(sku => sku.id != this.sku2FA)
                             this.has2FA = false
                         }
                     })
             },
             reset2FADialog() {
                 $('#reset-2fa-dialog').modal()
             },
             submitDiscount() {
                 $('#discount-dialog').modal('hide')
 
                 axios.put('/api/v4/wallets/' + this.user.wallets[0].id, { discount: this.wallet.discount_id })
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.$toast.success(response.data.message)
                             this.wallet = Object.assign({}, this.wallet, response.data)
 
                             // Update prices in Subscriptions tab
                             if (this.user.wallet.id == response.data.id) {
                                 this.discount = this.wallet.discount
                                 this.discount_description = this.wallet.discount_description
 
                                 this.skus.forEach(sku => {
                                     sku.price = this.$root.priceLabel(sku.cost, this.discount)
                                 })
                             }
                         }
                     })
             },
             submitEmail() {
                 axios.put('/api/v4/users/' + this.user.id, { external_email: this.external_email })
                     .then(response => {
                         if (response.data.status == 'success') {
                             $('#email-dialog').modal('hide')
                             this.$toast.success(response.data.message)
                             this.user.external_email = this.external_email
                             this.external_email = null // required because of Vue
                         }
                     })
             },
             submitOneOff() {
                 let wallet_id = this.user.wallets[0].id
                 let post = {
                     amount: this.oneoff_amount,
                     description: this.oneoff_description
                 }
 
                 if (this.oneoff_negative && /^\d+(\.?\d+)?$/.test(post.amount)) {
                     post.amount *= -1
                 }
 
                 // TODO: We maybe should use system currency not wallet currency,
                 //       or have a selector so the operator does not have to calculate
                 //       exchange rates
 
                 this.$root.clearFormValidation(this.dialog)
 
                 axios.post('/api/v4/wallets/' + wallet_id + '/one-off', post)
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.dialog.modal('hide')
                             this.$toast.success(response.data.message)
                             this.wallet = Object.assign({}, this.wallet, {balance: response.data.balance})
                             this.oneoff_amount = ''
                             this.oneoff_description = ''
                             this.reload()
                         }
                     })
             },
             suspendUser() {
                 axios.post('/api/v4/users/' + this.user.id + '/suspend', {})
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.$toast.success(response.data.message)
                             this.user = Object.assign({}, this.user, { isSuspended: true })
                         }
                     })
             },
             unsuspendUser() {
                 axios.post('/api/v4/users/' + this.user.id + '/unsuspend', {})
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.$toast.success(response.data.message)
                             this.user = Object.assign({}, this.user, { isSuspended: false })
                         }
                     })
             }
         }
     }
 </script>
diff --git a/src/resources/vue/Domain/Info.vue b/src/resources/vue/Domain/Info.vue
index 12afc0df..8b835a65 100644
--- a/src/resources/vue/Domain/Info.vue
+++ b/src/resources/vue/Domain/Info.vue
@@ -1,89 +1,142 @@
 <template>
     <div class="container">
         <status-component :status="status" @status-update="statusUpdate"></status-component>
 
-        <div v-if="domain && !domain.isConfirmed" class="card" id="domain-verify">
+        <div v-if="domain" class="card">
             <div class="card-body">
-                <div class="card-title">{{ $t('domain.verify') }}</div>
+                <div class="card-title">{{ domain.namespace }}</div>
                 <div class="card-text">
-                    <p>{{ $t('domain.verify-intro') }}</p>
-                    <p>
-                        <span v-html="$t('domain.verify-dns')"></span>
-                        <ul>
-                            <li>{{ $t('domain.verify-dns-txt') }} <code>{{ domain.hash_text }}</code></li>
-                            <li>{{ $t('domain.verify-dns-cname') }} <code>{{ domain.hash_cname }}.{{ domain.namespace }}. IN CNAME {{ domain.hash_code }}.{{ domain.namespace }}.</code></li>
-                        </ul>
-                        <span>{{ $t('domain.verify-outro') }}</span>
-                    </p>
-                    <p>{{ $t('domain.verify-sample') }} <pre>{{ domain.dns.join("\n") }}</pre></p>
-                    <button class="btn btn-primary" type="button" @click="confirm"><svg-icon icon="sync-alt"></svg-icon> {{ $t('btn.verify') }}</button>
-                </div>
-            </div>
-        </div>
-        <div v-if="domain && domain.isConfirmed" class="card" id="domain-config">
-            <div class="card-body">
-                <div class="card-title">{{ $t('domain.config') }}</div>
-                <div class="card-text">
-                    <p>{{ $t('domain.config-intro', { app: $root.appName }) }}</p>
-                    <p>{{ $t('domain.config-sample') }} <pre>{{ domain.config.join("\n") }}</pre></p>
-                    <p>{{ $t('domain.config-hint') }}</p>
+                    <ul class="nav nav-tabs mt-3" role="tablist">
+                        <li class="nav-item" v-if="!domain.isConfirmed">
+                            <a class="nav-link active" id="tab-general" href="#general" role="tab" aria-controls="general" aria-selected="true" @click="$root.tab">
+                                {{ $t('domain.verify') }}
+                            </a>
+                        </li>
+                        <li class="nav-item" v-if="domain.isConfirmed">
+                            <a class="nav-link active" id="tab-general" href="#general" role="tab" aria-controls="general" aria-selected="true" @click="$root.tab">
+                                {{ $t('domain.config') }}
+                            </a>
+                        </li>
+                        <li class="nav-item">
+                            <a class="nav-link" id="tab-settings" href="#settings" role="tab" aria-controls="settings" aria-selected="false" @click="$root.tab">
+                                {{ $t('form.settings') }}
+                            </a>
+                        </li>
+                    </ul>
+                    <div class="tab-content">
+                        <div class="tab-pane show active" id="general" role="tabpanel" aria-labelledby="tab-general">
+                            <div v-if="!domain.isConfirmed" class="card-body" id="domain-verify">
+                                <div class="card-text">
+                                    <p>{{ $t('domain.verify-intro') }}</p>
+                                    <p>
+                                        <span v-html="$t('domain.verify-dns')"></span>
+                                        <ul>
+                                            <li>{{ $t('domain.verify-dns-txt') }} <code>{{ domain.hash_text }}</code></li>
+                                            <li>{{ $t('domain.verify-dns-cname') }} <code>{{ domain.hash_cname }}.{{ domain.namespace }}. IN CNAME {{ domain.hash_code }}.{{ domain.namespace }}.</code></li>
+                                        </ul>
+                                        <span>{{ $t('domain.verify-outro') }}</span>
+                                    </p>
+                                    <p>{{ $t('domain.verify-sample') }} <pre>{{ domain.dns.join("\n") }}</pre></p>
+                                    <button class="btn btn-primary" type="button" @click="confirm"><svg-icon icon="sync-alt"></svg-icon> {{ $t('btn.verify') }}</button>
+                                </div>
+                            </div>
+                            <div v-if="domain.isConfirmed" class="card-body" id="domain-config">
+                                <div class="card-text">
+                                    <p>{{ $t('domain.config-intro', { app: $root.appName }) }}</p>
+                                    <p>{{ $t('domain.config-sample') }} <pre>{{ domain.config.join("\n") }}</pre></p>
+                                    <p>{{ $t('domain.config-hint') }}</p>
+                                </div>
+                            </div>
+                        </div>
+                        <div class="tab-pane" id="settings" role="tabpanel" aria-labelledby="tab-settings">
+                            <div class="card-body">
+                                <form @submit.prevent="submitSettings">
+                                    <div class="form-group row">
+                                        <label for="spf_whitelist" class="col-sm-4 col-form-label">{{ $t('domain.spf-whitelist') }}</label>
+                                        <div class="col-sm-8">
+                                            <list-input id="spf_whitelist" name="spf_whitelist" :list="spf_whitelist"></list-input>
+                                            <small id="spf-hint" class="form-text text-muted">
+                                                {{ $t('domain.spf-whitelist-text') }}
+                                                <span class="d-block" v-html="$t('domain.spf-whitelist-ex')"></span>
+                                            </small>
+                                        </div>
+                                    </div>
+                                    <button class="btn btn-primary" type="submit"><svg-icon icon="check"></svg-icon> Submit</button>
+                                </form>
+                            </div>
+                        </div>
+                    </div>
                 </div>
             </div>
         </div>
     </div>
 </template>
 
 <script>
+    import ListInput from '../Widgets/ListInput'
     import StatusComponent from '../Widgets/Status'
 
     export default {
         components: {
+            ListInput,
             StatusComponent
         },
         data() {
             return {
                 domain_id: null,
                 domain: null,
+                spf_whitelist: [],
                 status: {}
             }
         },
         created() {
             if (this.domain_id = this.$route.params.domain) {
                 this.$root.startLoading()
 
                 axios.get('/api/v4/domains/' + this.domain_id)
                     .then(response => {
                         this.$root.stopLoading()
                         this.domain = response.data
+                        this.spf_whitelist = this.domain.config.spf_whitelist || []
 
                         if (!this.domain.isConfirmed) {
                             $('#domain-verify button').focus()
                         }
 
                         this.status = response.data.statusInfo
                     })
                     .catch(this.$root.errorHandler)
             } else {
                 this.$root.errorPage(404)
             }
         },
         methods: {
             confirm() {
                 axios.get('/api/v4/domains/' + this.domain_id + '/confirm')
                     .then(response => {
                         if (response.data.status == 'success') {
                             this.domain.isConfirmed = true
                             this.status = response.data.statusInfo
                         }
 
                         if (response.data.message) {
                             this.$toast[response.data.status](response.data.message)
                         }
                     })
             },
             statusUpdate(domain) {
                 this.domain = Object.assign({}, this.domain, domain)
+            },
+            submitSettings() {
+                this.$root.clearFormValidation($('#settings form'))
+
+                let post = { spf_whitelist: this.spf_whitelist }
+
+                axios.post('/api/v4/domains/' + this.domain_id + '/config', post)
+                    .then(response => {
+                        this.$toast.success(response.data.message)
+                    })
             }
         }
     }
 </script>
diff --git a/src/resources/vue/User/Info.vue b/src/resources/vue/User/Info.vue
index c25fd63f..69e8b006 100644
--- a/src/resources/vue/User/Info.vue
+++ b/src/resources/vue/User/Info.vue
@@ -1,443 +1,486 @@
 <template>
     <div class="container">
         <status-component v-if="user_id !== 'new'" :status="status" @status-update="statusUpdate"></status-component>
 
         <div class="card" id="user-info">
             <div class="card-body">
                 <div class="card-title" v-if="user_id !== 'new'">{{ $t('user.title') }}
                     <button
                         class="btn btn-outline-danger button-delete float-right"
                         @click="showDeleteConfirmation()" type="button"
                     >
                         <svg-icon icon="trash-alt"></svg-icon> {{ $t('user.delete') }}
                     </button>
                 </div>
                 <div class="card-title" v-if="user_id === 'new'">{{ $t('user.new') }}</div>
                 <div class="card-text">
+                    <ul class="nav nav-tabs mt-3" role="tablist">
+                        <li class="nav-item">
+                           <a class="nav-link active" id="tab-general" href="#general" role="tab" aria-controls="general" aria-selected="true" @click="$root.tab">
+                               {{ $t('form.general') }}
+                           </a>
+                        </li>
+                        <li v-if="user_id !== 'new'" class="nav-item">
+                            <a class="nav-link" id="tab-settings" href="#settings" role="tab" aria-controls="settings" aria-selected="false" @click="$root.tab">
+                                {{ $t('form.settings') }}
+                            </a>
+                        </li>
+                    </ul>
+                    <div class="tab-content">
+                        <div class="tab-pane show active" id="general" role="tabpanel" aria-labelledby="tab-general">
+                            <div class="card-body">
                     <form @submit.prevent="submit">
                         <div v-if="user_id !== 'new'" class="form-group row plaintext">
                             <label for="status" class="col-sm-4 col-form-label">{{ $t('form.status') }}</label>
                             <div class="col-sm-8">
                                 <span :class="$root.userStatusClass(user) + ' form-control-plaintext'" id="status">{{ $root.userStatusText(user) }}</span>
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="first_name" class="col-sm-4 col-form-label">{{ $t('form.firstname') }}</label>
                             <div class="col-sm-8">
                                 <input type="text" class="form-control" id="first_name" v-model="user.first_name">
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="last_name" class="col-sm-4 col-form-label">{{ $t('form.lastname') }}</label>
                             <div class="col-sm-8">
                                 <input type="text" class="form-control" id="last_name" v-model="user.last_name">
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="organization" class="col-sm-4 col-form-label">{{ $t('user.org') }}</label>
                             <div class="col-sm-8">
                                 <input type="text" class="form-control" id="organization" v-model="user.organization">
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="email" class="col-sm-4 col-form-label">{{ $t('form.email') }}</label>
                             <div class="col-sm-8">
                                 <input type="text" class="form-control" id="email" :disabled="user_id !== 'new'" required v-model="user.email">
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="aliases-input" class="col-sm-4 col-form-label">{{ $t('user.aliases-email') }}</label>
                             <div class="col-sm-8">
                                 <list-input id="aliases" :list="user.aliases"></list-input>
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="password" class="col-sm-4 col-form-label">{{ $t('form.password') }}</label>
                             <div class="col-sm-8">
                                 <input type="password" class="form-control" id="password" v-model="user.password" :required="user_id === 'new'">
                             </div>
                         </div>
                         <div class="form-group row">
                             <label for="password_confirmaton" class="col-sm-4 col-form-label">{{ $t('form.password-confirm') }}</label>
                             <div class="col-sm-8">
                                 <input type="password" class="form-control" id="password_confirmation" v-model="user.password_confirmation" :required="user_id === 'new'">
                             </div>
                         </div>
                         <div v-if="user_id === 'new'" id="user-packages" class="form-group row">
                             <label class="col-sm-4 col-form-label">Package</label>
                             <div class="col-sm-8">
                                 <table class="table table-sm form-list">
                                     <thead class="thead-light sr-only">
                                         <tr>
                                             <th scope="col"></th>
                                             <th scope="col">{{ $t('user.package') }}</th>
                                             <th scope="col">{{ $t('user.price') }}</th>
                                             <th scope="col"></th>
                                         </tr>
                                     </thead>
                                     <tbody>
                                         <tr v-for="pkg in packages" :id="'p' + pkg.id" :key="pkg.id">
                                             <td class="selection">
                                                 <input type="checkbox" @click="selectPackage"
                                                        :value="pkg.id"
                                                        :checked="pkg.id == package_id"
                                                        :id="'pkg-input-' + pkg.id"
                                                 >
                                             </td>
                                             <td class="name">
                                                 <label :for="'pkg-input-' + pkg.id">{{ pkg.name }}</label>
                                             </td>
                                             <td class="price text-nowrap">
                                                 {{ $root.priceLabel(pkg.cost, discount) }}
                                             </td>
                                             <td class="buttons">
                                                 <button v-if="pkg.description" type="button" class="btn btn-link btn-lg p-0" v-tooltip.click="pkg.description">
                                                     <svg-icon icon="info-circle"></svg-icon>
                                                     <span class="sr-only">{{ $t('btn.moreinfo') }}</span>
                                                 </button>
                                             </td>
                                         </tr>
                                     </tbody>
                                 </table>
                                 <small v-if="discount > 0" class="hint">
                                     <hr class="m-0">
                                     &sup1; {{ $t('user.discount-hint') }}: {{ discount }}% - {{ discount_description }}
                                 </small>
                             </div>
                         </div>
                         <div v-if="user_id !== 'new'" id="user-skus" class="form-group row">
                             <label class="col-sm-4 col-form-label">{{ $t('user.subscriptions') }}</label>
                             <div class="col-sm-8">
                                 <table class="table table-sm form-list">
                                     <thead class="thead-light sr-only">
                                         <tr>
                                             <th scope="col"></th>
                                             <th scope="col">{{ $t('user.subscription') }}</th>
                                             <th scope="col">{{ $t('user.price') }}</th>
                                             <th scope="col"></th>
                                         </tr>
                                     </thead>
                                     <tbody>
                                         <tr v-for="sku in skus" :id="'s' + sku.id" :key="sku.id">
                                             <td class="selection">
                                                 <input type="checkbox" @input="onInputSku"
                                                        :value="sku.id"
                                                        :disabled="sku.readonly"
                                                        :checked="sku.enabled"
                                                        :id="'sku-input-' + sku.title"
                                                 >
                                             </td>
                                             <td class="name">
                                                 <label :for="'sku-input-' + sku.title">{{ sku.name }}</label>
                                                 <div v-if="sku.range" class="range-input">
                                                     <label class="text-nowrap">{{ sku.range.min }} {{ sku.range.unit }}</label>
                                                     <input
                                                         type="range" class="custom-range" @input="rangeUpdate"
                                                         :value="sku.value || sku.range.min"
                                                         :min="sku.range.min"
                                                         :max="sku.range.max"
                                                     >
                                                 </div>
                                             </td>
                                             <td class="price text-nowrap">
                                                 {{ $root.priceLabel(sku.cost, discount) }}
                                             </td>
                                             <td class="buttons">
                                                 <button v-if="sku.description" type="button" class="btn btn-link btn-lg p-0" v-tooltip.click="sku.description">
                                                     <svg-icon icon="info-circle"></svg-icon>
                                                     <span class="sr-only">{{ $t('btn.moreinfo') }}</span>
                                                 </button>
                                             </td>
                                         </tr>
                                     </tbody>
                                 </table>
                                 <small v-if="discount > 0" class="hint">
                                     <hr class="m-0">
                                     &sup1; {{ $t('user.discount-hint') }}: {{ discount }}% - {{ discount_description }}
                                 </small>
                             </div>
                         </div>
                         <button class="btn btn-primary" type="submit"><svg-icon icon="check"></svg-icon> {{ $t('btn.submit') }}</button>
                     </form>
+                            </div>
+                        </div>
+                        <div class="tab-pane" id="settings" role="tabpanel" aria-labelledby="tab-settings">
+                            <div class="card-body">
+                                <form @submit.prevent="submitSettings">
+                                    <div class="form-group row checkbox">
+                                        <label for="greylisting" class="col-sm-4 col-form-label">{{ $t('user.greylisting') }}</label>
+                                        <div class="col-sm-8 pt-2">
+                                            <input type="checkbox" id="greylisting" name="greylisting" value="1" :checked="user.config.greylisting">
+                                            <small id="greylisting-hint" class="form-text text-muted">
+                                                {{ $t('user.greylisting-text') }}
+                                            </small>
+                                        </div>
+                                    </div>
+                                    <button class="btn btn-primary" type="submit"><svg-icon icon="check"></svg-icon> {{ $t('btn.submit') }}</button>
+                                </form>
+                            </div>
+                        </div>
+                    </div>
                 </div>
             </div>
         </div>
         <div id="delete-warning" class="modal" tabindex="-1" role="dialog">
             <div class="modal-dialog" role="document">
                 <div class="modal-content">
                     <div class="modal-header">
                         <h5 class="modal-title"></h5>
                         <button type="button" class="close" data-dismiss="modal" :aria-label="$t('btn.close')">
                             <span aria-hidden="true">&times;</span>
                         </button>
                     </div>
                     <div class="modal-body">
                         <p>{{ $t('user.delete-text') }}</p>
                     </div>
                     <div class="modal-footer">
                         <button type="button" class="btn btn-secondary modal-cancel" data-dismiss="modal">{{ $t('btn.cancel') }}</button>
                         <button type="button" class="btn btn-danger modal-action" @click="deleteUser()">
                             <svg-icon icon="trash-alt"></svg-icon> {{ $t('btn.delete') }}
                         </button>
                     </div>
                 </div>
             </div>
         </div>
     </div>
 </template>
 
 <script>
     import ListInput from '../Widgets/ListInput'
     import StatusComponent from '../Widgets/Status'
 
     export default {
         components: {
             ListInput,
             StatusComponent
         },
         data() {
             return {
                 discount: 0,
                 discount_description: '',
                 user_id: null,
-                user: { aliases: [] },
+                user: { aliases: [], config: [] },
                 packages: [],
                 package_id: null,
                 skus: [],
                 status: {}
             }
         },
         created() {
             this.user_id = this.$route.params.user
 
             let wallet = this.$store.state.authInfo.accounts[0]
 
             if (!wallet) {
                 wallet = this.$store.state.authInfo.wallets[0]
             }
 
             if (wallet && wallet.discount) {
                 this.discount = wallet.discount
                 this.discount_description = wallet.discount_description
             }
 
             this.$root.startLoading()
 
             if (this.user_id === 'new') {
                 // do nothing (for now)
                 axios.get('/api/v4/packages')
                     .then(response => {
                         this.$root.stopLoading()
 
                         this.packages = response.data.filter(pkg => !pkg.isDomain)
                         this.package_id = this.packages[0].id
                     })
                     .catch(this.$root.errorHandler)
             }
             else {
                 axios.get('/api/v4/users/' + this.user_id)
                     .then(response => {
                         this.$root.stopLoading()
 
                         this.user = response.data
                         this.user.first_name = response.data.settings.first_name
                         this.user.last_name = response.data.settings.last_name
                         this.user.organization = response.data.settings.organization
                         this.discount = this.user.wallet.discount
                         this.discount_description = this.user.wallet.discount_description
                         this.status = response.data.statusInfo
 
                         axios.get('/api/v4/users/' + this.user_id + '/skus?type=user')
                             .then(response => {
                                 // "merge" SKUs with user entitlement-SKUs
                                 this.skus = response.data
                                     .map(sku => {
                                         const userSku = this.user.skus[sku.id]
                                         if (userSku) {
                                             sku.enabled = true
                                             sku.skuCost = sku.cost
                                             sku.cost = userSku.costs.reduce((sum, current) => sum + current)
                                             sku.value = userSku.count
                                             sku.costs = userSku.costs
                                         } else if (!sku.readonly) {
                                             sku.enabled = false
                                         }
 
                                         return sku
                                     })
 
                                 // Update all range inputs (and price)
                                 this.$nextTick(() => {
                                     $('#user-skus input[type=range]').each((idx, elem) => { this.rangeUpdate(elem) })
                                 })
                             })
                             .catch(this.$root.errorHandler)
                     })
                     .catch(this.$root.errorHandler)
             }
         },
         mounted() {
             $('#first_name').focus()
         },
         methods: {
             submit() {
                 this.$root.clearFormValidation($('#user-info form'))
 
                 let method = 'post'
                 let location = '/api/v4/users'
 
                 if (this.user_id !== 'new') {
                     method = 'put'
                     location += '/' + this.user_id
 
                     let skus = {}
                     $('#user-skus input[type=checkbox]:checked').each((idx, input) => {
                         let id = $(input).val()
                         let range = $(input).parents('tr').first().find('input[type=range]').val()
 
                         skus[id] = range || 1
                     })
                     this.user.skus = skus
                 } else {
                     this.user.package = this.package_id
                 }
 
                 axios[method](location, this.user)
                     .then(response => {
                         if (response.data.statusInfo) {
                             this.$store.state.authInfo.statusInfo = response.data.statusInfo
                         }
 
                         this.$toast.success(response.data.message)
                         this.$router.push({ name: 'users' })
                     })
             },
+            submitSettings() {
+                this.$root.clearFormValidation($('#settings form'))
+                let post = { greylisting: $('#greylisting').prop('checked') ? 1 : 0 }
+
+                axios.post('/api/v4/users/' + this.user_id + '/config', post)
+                    .then(response => {
+                        this.$toast.success(response.data.message)
+                    })
+            },
             onInputSku(e) {
                 let input = e.target
                 let sku = this.findSku(input.value)
                 let required = []
 
                 // We use 'readonly', not 'disabled', because we might want to handle
                 // input events. For example to display an error when someone clicks
                 // the locked input
                 if (input.readOnly) {
                     input.checked = !input.checked
                     // TODO: Display an alert explaining why it's locked
                     return
                 }
 
                 // TODO: Following code might not work if we change definition of forbidden/required
                 //       or we just need more sophisticated SKU dependency rules
 
                 if (input.checked) {
                     // Check if a required SKU is selected, alert the user if not
                     (sku.required || []).forEach(title => {
                         this.skus.forEach(item => {
                             let checkbox
                             if (item.handler == title && (checkbox = $('#s' + item.id).find('input[type=checkbox]')[0])) {
                                 if (!checkbox.checked) {
                                     required.push(item.name)
                                 }
                             }
                         })
                     })
 
                     if (required.length) {
                         input.checked = false
                         return alert(this.$t('user.skureq', { sku: sku.name, list: required.join(', ') }))
                     }
                 } else {
                     // Uncheck all dependent SKUs, e.g. when unchecking Groupware we also uncheck Activesync
                     // TODO: Should we display an alert instead?
                     this.skus.forEach(item => {
                         if (item.required && item.required.indexOf(sku.handler) > -1) {
                             $('#s' + item.id).find('input[type=checkbox]').prop('checked', false)
                         }
                     })
                 }
 
                 // Uncheck+lock/unlock conflicting SKUs
                 (sku.forbidden || []).forEach(title => {
                     this.skus.forEach(item => {
                         let checkbox
                         if (item.handler == title && (checkbox = $('#s' + item.id).find('input[type=checkbox]')[0])) {
                             if (input.checked) {
                                 checkbox.checked = false
                                 checkbox.readOnly = true
                             } else {
                                 checkbox.readOnly = false
                             }
                         }
                     })
                 })
             },
             selectPackage(e) {
                 // Make sure there always is only one package selected
                 $('#user-packages input').prop('checked', false)
                 this.package_id = $(e.target).prop('checked', false).val()
             },
             rangeUpdate(e) {
                 let input = $(e.target || e)
                 let value = input.val()
                 let record = input.parents('tr').first()
                 let sku_id = record.find('input[type=checkbox]').val()
                 let sku = this.findSku(sku_id)
                 let existing = sku.costs ? sku.costs.length : 0
                 let cost
 
                 // Calculate cost, considering both existing entitlement cost and sku cost
                 if (existing) {
                     cost = sku.costs
                         .sort((a, b) => a - b) // sort by cost ascending (free units first)
                         .slice(0, value)
                         .reduce((sum, current) => sum + current)
 
                     if (value > existing) {
                         cost += sku.skuCost * (value - existing)
                     }
                 } else {
                     cost = sku.cost * (value - sku.units_free)
                 }
 
                 // Update the label
                 input.prev().text(value + ' ' + sku.range.unit)
 
                 // Update the price
                 record.find('.price').text(this.$root.priceLabel(cost, this.discount))
             },
             findSku(id) {
                 for (let i = 0; i < this.skus.length; i++) {
                     if (this.skus[i].id == id) {
                         return this.skus[i];
                     }
                 }
             },
             statusUpdate(user) {
                 this.user = Object.assign({}, this.user, user)
             },
             deleteUser() {
                 // Delete the user from the confirm dialog
                 axios.delete('/api/v4/users/' + this.user_id)
                     .then(response => {
                         if (response.data.status == 'success') {
                            this.$toast.success(response.data.message)
                            this.$router.push({ name: 'users' })
                         }
                     })
             },
             showDeleteConfirmation() {
                 // Deleting self, redirect to /profile/delete page
                 if (this.user_id == this.$store.state.authInfo.id) {
                     this.$router.push({ name: 'profile-delete' })
                 } else {
                     // Display the warning
                     let dialog = $('#delete-warning')
                     dialog.find('.modal-title').text(this.$t('user.delete-email', { email: this.user.email }))
                     dialog.on('shown.bs.modal', () => {
                         dialog.find('button.modal-cancel').focus()
                     }).modal()
                 }
             }
         }
     }
 </script>
diff --git a/src/resources/vue/Widgets/ListInput.vue b/src/resources/vue/Widgets/ListInput.vue
index 95fe7f00..f7f7e4de 100644
--- a/src/resources/vue/Widgets/ListInput.vue
+++ b/src/resources/vue/Widgets/ListInput.vue
@@ -1,75 +1,78 @@
 <template>
     <div class="list-input" :id="id">
         <div class="input-group">
             <input :id="id + '-input'" type="text" class="form-control main-input" @keydown="keyDown">
             <div class="input-group-append">
                 <a href="#" class="btn btn-outline-secondary" @click.prevent="addItem">
                     <svg-icon icon="plus"></svg-icon>
                     <span class="sr-only">{{ $t('btn.add') }}</span>
                 </a>
             </div>
         </div>
         <div class="input-group" v-for="(item, index) in list" :key="index">
             <input type="text" class="form-control" v-model="list[index]">
             <div class="input-group-append">
                 <a href="#" class="btn btn-outline-secondary" @click.prevent="deleteItem(index)">
                     <svg-icon icon="trash-alt"></svg-icon>
                     <span class="sr-only">{{ $t('btn.delete') }}</span>
                 </a>
             </div>
         </div>
     </div>
 </template>
 
 <script>
     export default {
         props: {
             list: { type: Array, default: () => [] },
             id: { type: String, default: '' }
         },
         mounted() {
             this.input = $(this.$el).find('.main-input')[0]
 
             // On form submit add the text from main input to the list
             // Users tend to forget about pressing the "plus" button
             // Note: We can't use form.onsubmit (too late)
             // Note: Use of input.onblur has been proven to be problematic
             // TODO: What with forms that have no submit button?
             $(this.$el).closest('form').find('button[type=submit]').on('click', () => {
                 this.addItem(false)
             })
         },
         methods: {
             addItem(focus) {
                 let value = this.input.value
 
                 if (value) {
                     this.list.push(value)
                     this.input.value = ''
                     this.input.classList.remove('is-invalid')
 
                     if (focus !== false) {
                         this.input.focus()
                     }
 
                     if (this.list.length == 1) {
                         this.$el.classList.remove('is-invalid')
                     }
+
+                    this.$emit('change', this.$el)
                 }
             },
             deleteItem(index) {
                 this.$delete(this.list, index)
+                this.$emit('change', this.$el)
 
                 if (!this.list.length) {
                     this.$el.classList.remove('is-invalid')
                 }
             },
             keyDown(e) {
                 if (e.which == 13 && e.target.value) {
                     this.addItem()
                     e.preventDefault()
                 }
             }
         }
     }
 </script>
diff --git a/src/routes/api.php b/src/routes/api.php
index 115dfde5..bc18825d 100644
--- a/src/routes/api.php
+++ b/src/routes/api.php
@@ -1,219 +1,221 @@
 <?php
 
 use Illuminate\Http\Request;
 
 /*
 |--------------------------------------------------------------------------
 | API Routes
 |--------------------------------------------------------------------------
 |
 | Here is where you can register API routes for your application. These
 | routes are loaded by the RouteServiceProvider within a group which
 | is assigned the "api" middleware group. Enjoy building your API!
 |
 */
 
 $prefix = \trim(\parse_url(\config('app.url'), PHP_URL_PATH), '/') . '/';
 
 Route::group(
     [
         'middleware' => 'api',
         'prefix' => $prefix . 'api/auth'
     ],
     function ($router) {
         Route::post('login', 'API\AuthController@login');
 
         Route::group(
             ['middleware' => 'auth:api'],
             function ($router) {
                 Route::get('info', 'API\AuthController@info');
                 Route::post('logout', 'API\AuthController@logout');
                 Route::post('refresh', 'API\AuthController@refresh');
             }
         );
     }
 );
 
 Route::group(
     [
         'domain' => \config('app.domain'),
         'middleware' => 'api',
         'prefix' => $prefix . 'api/auth'
     ],
     function ($router) {
         Route::post('password-reset/init', 'API\PasswordResetController@init');
         Route::post('password-reset/verify', 'API\PasswordResetController@verify');
         Route::post('password-reset', 'API\PasswordResetController@reset');
 
         Route::post('signup/init', 'API\SignupController@init');
         Route::get('signup/invitations/{id}', 'API\SignupController@invitation');
         Route::get('signup/plans', 'API\SignupController@plans');
         Route::post('signup/verify', 'API\SignupController@verify');
         Route::post('signup', 'API\SignupController@signup');
     }
 );
 
 Route::group(
     [
         'domain' => \config('app.domain'),
         'middleware' => 'auth:api',
         'prefix' => $prefix . 'api/v4'
     ],
     function () {
         Route::apiResource('domains', API\V4\DomainsController::class);
         Route::get('domains/{id}/confirm', 'API\V4\DomainsController@confirm');
         Route::get('domains/{id}/status', 'API\V4\DomainsController@status');
+        Route::post('domains/{id}/config', 'API\V4\DomainsController@setConfig');
 
         Route::apiResource('groups', API\V4\GroupsController::class);
         Route::get('groups/{id}/status', 'API\V4\GroupsController@status');
 
         Route::apiResource('packages', API\V4\PackagesController::class);
         Route::apiResource('skus', API\V4\SkusController::class);
 
         Route::apiResource('users', API\V4\UsersController::class);
+        Route::post('users/{id}/config', 'API\V4\UsersController@setConfig');
         Route::get('users/{id}/skus', 'API\V4\SkusController@userSkus');
         Route::get('users/{id}/status', 'API\V4\UsersController@status');
 
         Route::apiResource('wallets', API\V4\WalletsController::class);
         Route::get('wallets/{id}/transactions', 'API\V4\WalletsController@transactions');
         Route::get('wallets/{id}/receipts', 'API\V4\WalletsController@receipts');
         Route::get('wallets/{id}/receipts/{receipt}', 'API\V4\WalletsController@receiptDownload');
 
         Route::post('payments', 'API\V4\PaymentsController@store');
         //Route::delete('payments', 'API\V4\PaymentsController@cancel');
         Route::get('payments/mandate', 'API\V4\PaymentsController@mandate');
         Route::post('payments/mandate', 'API\V4\PaymentsController@mandateCreate');
         Route::put('payments/mandate', 'API\V4\PaymentsController@mandateUpdate');
         Route::delete('payments/mandate', 'API\V4\PaymentsController@mandateDelete');
         Route::get('payments/methods', 'API\V4\PaymentsController@paymentMethods');
         Route::get('payments/pending', 'API\V4\PaymentsController@payments');
         Route::get('payments/has-pending', 'API\V4\PaymentsController@hasPayments');
 
         Route::get('openvidu/rooms', 'API\V4\OpenViduController@index');
         Route::post('openvidu/rooms/{id}/close', 'API\V4\OpenViduController@closeRoom');
         Route::post('openvidu/rooms/{id}/config', 'API\V4\OpenViduController@setRoomConfig');
 
         // FIXME: I'm not sure about this one, should we use DELETE request maybe?
         Route::post('openvidu/rooms/{id}/connections/{conn}/dismiss', 'API\V4\OpenViduController@dismissConnection');
         Route::put('openvidu/rooms/{id}/connections/{conn}', 'API\V4\OpenViduController@updateConnection');
         Route::post('openvidu/rooms/{id}/request/{reqid}/accept', 'API\V4\OpenViduController@acceptJoinRequest');
         Route::post('openvidu/rooms/{id}/request/{reqid}/deny', 'API\V4\OpenViduController@denyJoinRequest');
     }
 );
 
 // Note: In Laravel 7.x we could just use withoutMiddleware() instead of a separate group
 Route::group(
     [
         'domain' => \config('app.domain'),
         'prefix' => $prefix . 'api/v4'
     ],
     function () {
         Route::post('openvidu/rooms/{id}', 'API\V4\OpenViduController@joinRoom');
         Route::post('openvidu/rooms/{id}/connections', 'API\V4\OpenViduController@createConnection');
         // FIXME: I'm not sure about this one, should we use DELETE request maybe?
         Route::post('openvidu/rooms/{id}/connections/{conn}/dismiss', 'API\V4\OpenViduController@dismissConnection');
         Route::put('openvidu/rooms/{id}/connections/{conn}', 'API\V4\OpenViduController@updateConnection');
         Route::post('openvidu/rooms/{id}/request/{reqid}/accept', 'API\V4\OpenViduController@acceptJoinRequest');
         Route::post('openvidu/rooms/{id}/request/{reqid}/deny', 'API\V4\OpenViduController@denyJoinRequest');
     }
 );
 
 Route::group(
     [
         'domain' => \config('app.domain'),
         'middleware' => 'api',
         'prefix' => $prefix . 'api/v4'
     ],
     function ($router) {
         Route::post('support/request', 'API\V4\SupportController@request');
     }
 );
 
 Route::group(
     [
         'domain' => \config('app.domain'),
         'prefix' => $prefix . 'api/webhooks'
     ],
     function () {
         Route::post('greylist', 'API\V4\PolicyController@greylist');
         Route::post('payment/{provider}', 'API\V4\PaymentsController@webhook');
         Route::post('meet/openvidu', 'API\V4\OpenViduController@webhook');
         Route::post('spf', 'API\V4\PolicyController@senderPolicyFramework');
     }
 );
 
 Route::group(
     [
         'domain' => 'admin.' . \config('app.domain'),
         'middleware' => ['auth:api', 'admin'],
         'prefix' => $prefix . 'api/v4',
     ],
     function () {
         Route::apiResource('domains', API\V4\Admin\DomainsController::class);
         Route::post('domains/{id}/suspend', 'API\V4\Admin\DomainsController@suspend');
         Route::post('domains/{id}/unsuspend', 'API\V4\Admin\DomainsController@unsuspend');
 
         Route::apiResource('groups', API\V4\Admin\GroupsController::class);
         Route::post('groups/{id}/suspend', 'API\V4\Admin\GroupsController@suspend');
         Route::post('groups/{id}/unsuspend', 'API\V4\Admin\GroupsController@unsuspend');
 
         Route::apiResource('packages', API\V4\Admin\PackagesController::class);
         Route::apiResource('skus', API\V4\Admin\SkusController::class);
         Route::apiResource('users', API\V4\Admin\UsersController::class);
         Route::post('users/{id}/reset2FA', 'API\V4\Admin\UsersController@reset2FA');
         Route::get('users/{id}/skus', 'API\V4\Admin\SkusController@userSkus');
         Route::post('users/{id}/suspend', 'API\V4\Admin\UsersController@suspend');
         Route::post('users/{id}/unsuspend', 'API\V4\Admin\UsersController@unsuspend');
         Route::apiResource('wallets', API\V4\Admin\WalletsController::class);
         Route::post('wallets/{id}/one-off', 'API\V4\Admin\WalletsController@oneOff');
         Route::get('wallets/{id}/transactions', 'API\V4\Admin\WalletsController@transactions');
         Route::apiResource('discounts', API\V4\Admin\DiscountsController::class);
 
         Route::get('stats/chart/{chart}', 'API\V4\Admin\StatsController@chart');
     }
 );
 
 Route::group(
     [
         'domain' => 'reseller.' . \config('app.domain'),
         'middleware' => ['auth:api', 'reseller'],
         'prefix' => $prefix . 'api/v4',
     ],
     function () {
         Route::apiResource('domains', API\V4\Reseller\DomainsController::class);
         Route::post('domains/{id}/suspend', 'API\V4\Reseller\DomainsController@suspend');
         Route::post('domains/{id}/unsuspend', 'API\V4\Reseller\DomainsController@unsuspend');
 
         Route::apiResource('groups', API\V4\Reseller\GroupsController::class);
         Route::post('groups/{id}/suspend', 'API\V4\Reseller\GroupsController@suspend');
         Route::post('groups/{id}/unsuspend', 'API\V4\Reseller\GroupsController@unsuspend');
 
         Route::apiResource('invitations', API\V4\Reseller\InvitationsController::class);
         Route::post('invitations/{id}/resend', 'API\V4\Reseller\InvitationsController@resend');
         Route::apiResource('packages', API\V4\Reseller\PackagesController::class);
 
         Route::post('payments', 'API\V4\Reseller\PaymentsController@store');
         Route::get('payments/mandate', 'API\V4\Reseller\PaymentsController@mandate');
         Route::post('payments/mandate', 'API\V4\Reseller\PaymentsController@mandateCreate');
         Route::put('payments/mandate', 'API\V4\Reseller\PaymentsController@mandateUpdate');
         Route::delete('payments/mandate', 'API\V4\Reseller\PaymentsController@mandateDelete');
         Route::get('payments/methods', 'API\V4\Reseller\PaymentsController@paymentMethods');
         Route::get('payments/pending', 'API\V4\Reseller\PaymentsController@payments');
         Route::get('payments/has-pending', 'API\V4\Reseller\PaymentsController@hasPayments');
 
         Route::apiResource('skus', API\V4\Reseller\SkusController::class);
         Route::apiResource('users', API\V4\Reseller\UsersController::class);
         Route::post('users/{id}/reset2FA', 'API\V4\Reseller\UsersController@reset2FA');
         Route::get('users/{id}/skus', 'API\V4\Reseller\SkusController@userSkus');
         Route::post('users/{id}/suspend', 'API\V4\Reseller\UsersController@suspend');
         Route::post('users/{id}/unsuspend', 'API\V4\Reseller\UsersController@unsuspend');
         Route::apiResource('wallets', API\V4\Reseller\WalletsController::class);
         Route::post('wallets/{id}/one-off', 'API\V4\Reseller\WalletsController@oneOff');
         Route::get('wallets/{id}/receipts', 'API\V4\Reseller\WalletsController@receipts');
         Route::get('wallets/{id}/receipts/{receipt}', 'API\V4\Reseller\WalletsController@receiptDownload');
         Route::get('wallets/{id}/transactions', 'API\V4\Reseller\WalletsController@transactions');
         Route::apiResource('discounts', API\V4\Reseller\DiscountsController::class);
 
         Route::get('stats/chart/{chart}', 'API\V4\Reseller\StatsController@chart');
     }
 );
diff --git a/src/tests/Browser/Admin/DomainTest.php b/src/tests/Browser/Admin/DomainTest.php
index a13f86ce..65f9865a 100644
--- a/src/tests/Browser/Admin/DomainTest.php
+++ b/src/tests/Browser/Admin/DomainTest.php
@@ -1,119 +1,143 @@
 <?php
 
 namespace Tests\Browser\Admin;
 
 use App\Domain;
 use Tests\Browser;
 use Tests\Browser\Components\Toast;
 use Tests\Browser\Pages\Admin\Domain as DomainPage;
 use Tests\Browser\Pages\Admin\User as UserPage;
 use Tests\Browser\Pages\Dashboard;
 use Tests\Browser\Pages\Home;
 use Tests\TestCaseDusk;
 use Illuminate\Foundation\Testing\DatabaseMigrations;
 
 class DomainTest extends TestCaseDusk
 {
     /**
      * {@inheritDoc}
      */
     public function setUp(): void
     {
         parent::setUp();
         self::useAdminUrl();
     }
 
     /**
      * {@inheritDoc}
      */
     public function tearDown(): void
     {
+        $domain = $this->getTestDomain('kolab.org');
+        $domain->setSetting('spf_whitelist', null);
+
         parent::tearDown();
     }
 
     /**
      * Test domain info page (unauthenticated)
      */
     public function testDomainUnauth(): void
     {
         // Test that the page requires authentication
         $this->browse(function (Browser $browser) {
             $domain = $this->getTestDomain('kolab.org');
             $browser->visit('/domain/' . $domain->id)->on(new Home());
         });
     }
 
     /**
      * Test domain info page
      */
     public function testDomainInfo(): void
     {
         $this->browse(function (Browser $browser) {
             $domain = $this->getTestDomain('kolab.org');
             $domain_page = new DomainPage($domain->id);
             $john = $this->getTestUser('john@kolab.org');
             $user_page = new UserPage($john->id);
 
+            $domain->setSetting('spf_whitelist', null);
+
             // Goto the domain page
             $browser->visit(new Home())
                 ->submitLogon('jeroen@jeroen.jeroen', 'jeroen', true)
                 ->on(new Dashboard())
                 ->visit($user_page)
                 ->on($user_page)
                 ->click('@nav #tab-domains')
                 ->pause(1000)
                 ->click('@user-domains table tbody tr:first-child td a');
 
             $browser->on($domain_page)
                 ->assertSeeIn('@domain-info .card-title', 'kolab.org')
                 ->with('@domain-info form', function (Browser $browser) use ($domain) {
                     $browser->assertElementsCount('.row', 2)
                         ->assertSeeIn('.row:nth-child(1) label', 'ID (Created)')
                         ->assertSeeIn('.row:nth-child(1) #domainid', "{$domain->id} ({$domain->created_at})")
                         ->assertSeeIn('.row:nth-child(2) label', 'Status')
                         ->assertSeeIn('.row:nth-child(2) #status span.text-success', 'Active');
                 });
 
             // Some tabs are loaded in background, wait a second
             $browser->pause(500)
-                ->assertElementsCount('@nav a', 1);
+                ->assertElementsCount('@nav a', 2);
 
             // Assert Configuration tab
             $browser->assertSeeIn('@nav #tab-config', 'Configuration')
                 ->with('@domain-config', function (Browser $browser) {
                     $browser->assertSeeIn('pre#dns-verify', 'kolab-verify.kolab.org.')
                         ->assertSeeIn('pre#dns-config', 'kolab.org.');
                 });
+
+            // Assert Settings tab
+            $browser->assertSeeIn('@nav #tab-settings', 'Settings')
+                ->click('@nav #tab-settings')
+                ->with('@domain-settings form', function (Browser $browser) {
+                    $browser->assertElementsCount('.row', 1)
+                        ->assertSeeIn('.row:first-child label', 'SPF Whitelist')
+                        ->assertSeeIn('.row:first-child .form-control-plaintext', 'none');
+                });
+
+            // Assert non-empty SPF whitelist
+            $domain->setSetting('spf_whitelist', json_encode(['.test1.com', '.test2.com']));
+
+            $browser->refresh()
+                ->waitFor('@nav #tab-settings')
+                ->click('@nav #tab-settings')
+                ->with('@domain-settings form', function (Browser $browser) {
+                    $browser->assertSeeIn('.row:first-child .form-control-plaintext', '.test1.com, .test2.com');
+                });
         });
     }
 
     /**
      * Test suspending/unsuspending a domain
      *
      * @depends testDomainInfo
      */
     public function testSuspendAndUnsuspend(): void
     {
         $this->browse(function (Browser $browser) {
             $domain = $this->getTestDomain('domainscontroller.com', [
                     'status' => Domain::STATUS_NEW | Domain::STATUS_ACTIVE
                         | Domain::STATUS_LDAP_READY | Domain::STATUS_CONFIRMED
                         | Domain::STATUS_VERIFIED,
                     'type' => Domain::TYPE_EXTERNAL,
             ]);
 
             $browser->visit(new DomainPage($domain->id))
                 ->assertVisible('@domain-info #button-suspend')
                 ->assertMissing('@domain-info #button-unsuspend')
                 ->click('@domain-info #button-suspend')
                 ->assertToast(Toast::TYPE_SUCCESS, 'Domain suspended successfully.')
                 ->assertSeeIn('@domain-info #status span.text-warning', 'Suspended')
                 ->assertMissing('@domain-info #button-suspend')
                 ->click('@domain-info #button-unsuspend')
                 ->assertToast(Toast::TYPE_SUCCESS, 'Domain unsuspended successfully.')
                 ->assertSeeIn('@domain-info #status span.text-success', 'Active')
                 ->assertVisible('@domain-info #button-suspend')
                 ->assertMissing('@domain-info #button-unsuspend');
         });
     }
 }
diff --git a/src/tests/Browser/Admin/UserTest.php b/src/tests/Browser/Admin/UserTest.php
index 771200f5..169b0db3 100644
--- a/src/tests/Browser/Admin/UserTest.php
+++ b/src/tests/Browser/Admin/UserTest.php
@@ -1,498 +1,516 @@
 <?php
 
 namespace Tests\Browser\Admin;
 
 use App\Auth\SecondFactor;
 use App\Discount;
 use App\Entitlement;
 use App\Sku;
 use App\User;
 use Tests\Browser;
 use Tests\Browser\Components\Dialog;
 use Tests\Browser\Components\Toast;
 use Tests\Browser\Pages\Admin\User as UserPage;
 use Tests\Browser\Pages\Dashboard;
 use Tests\Browser\Pages\Home;
 use Tests\TestCaseDusk;
 use Illuminate\Foundation\Testing\DatabaseMigrations;
 
 class UserTest extends TestCaseDusk
 {
     /**
      * {@inheritDoc}
      */
     public function setUp(): void
     {
         parent::setUp();
         self::useAdminUrl();
 
         $john = $this->getTestUser('john@kolab.org');
         $john->setSettings([
                 'phone' => '+48123123123',
                 'external_email' => 'john.doe.external@gmail.com',
         ]);
         if ($john->isSuspended()) {
             User::where('email', $john->email)->update(['status' => $john->status - User::STATUS_SUSPENDED]);
         }
         $wallet = $john->wallets()->first();
         $wallet->discount()->dissociate();
         $wallet->save();
 
         Entitlement::where('cost', '>=', 5000)->delete();
         $this->deleteTestGroup('group-test@kolab.org');
         $this->clearMeetEntitlements();
     }
 
     /**
      * {@inheritDoc}
      */
     public function tearDown(): void
     {
         $john = $this->getTestUser('john@kolab.org');
         $john->setSettings([
                 'phone' => null,
                 'external_email' => 'john.doe.external@gmail.com',
         ]);
         if ($john->isSuspended()) {
             User::where('email', $john->email)->update(['status' => $john->status - User::STATUS_SUSPENDED]);
         }
         $wallet = $john->wallets()->first();
         $wallet->discount()->dissociate();
         $wallet->save();
 
         Entitlement::where('cost', '>=', 5000)->delete();
         $this->deleteTestGroup('group-test@kolab.org');
         $this->clearMeetEntitlements();
 
         parent::tearDown();
     }
 
     /**
      * Test user info page (unauthenticated)
      */
     public function testUserUnauth(): void
     {
         // Test that the page requires authentication
         $this->browse(function (Browser $browser) {
             $jack = $this->getTestUser('jack@kolab.org');
             $browser->visit('/user/' . $jack->id)->on(new Home());
         });
     }
 
     /**
      * Test user info page
      */
     public function testUserInfo(): void
     {
         $this->browse(function (Browser $browser) {
             $jack = $this->getTestUser('jack@kolab.org');
             $page = new UserPage($jack->id);
 
             $browser->visit(new Home())
                 ->submitLogon('jeroen@jeroen.jeroen', 'jeroen', true)
                 ->on(new Dashboard())
                 ->visit($page)
                 ->on($page);
 
             // Assert main info box content
             $browser->assertSeeIn('@user-info .card-title', $jack->email)
                 ->with('@user-info form', function (Browser $browser) use ($jack) {
                     $browser->assertElementsCount('.row', 7)
                         ->assertSeeIn('.row:nth-child(1) label', 'Managed by')
                         ->assertSeeIn('.row:nth-child(1) #manager a', 'john@kolab.org')
                         ->assertSeeIn('.row:nth-child(2) label', 'ID (Created)')
                         ->assertSeeIn('.row:nth-child(2) #userid', "{$jack->id} ({$jack->created_at})")
                         ->assertSeeIn('.row:nth-child(3) label', 'Status')
                         ->assertSeeIn('.row:nth-child(3) #status span.text-success', 'Active')
                         ->assertSeeIn('.row:nth-child(4) label', 'First Name')
                         ->assertSeeIn('.row:nth-child(4) #first_name', 'Jack')
                         ->assertSeeIn('.row:nth-child(5) label', 'Last Name')
                         ->assertSeeIn('.row:nth-child(5) #last_name', 'Daniels')
                         ->assertSeeIn('.row:nth-child(6) label', 'External Email')
                         ->assertMissing('.row:nth-child(6) #external_email a')
                         ->assertSeeIn('.row:nth-child(7) label', 'Country')
                         ->assertSeeIn('.row:nth-child(7) #country', 'United States');
                 });
 
             // Some tabs are loaded in background, wait a second
             $browser->pause(500)
                 ->assertElementsCount('@nav a', 6);
 
             // Note: Finances tab is tested in UserFinancesTest.php
             $browser->assertSeeIn('@nav #tab-finances', 'Finances');
 
             // Assert Aliases tab
             $browser->assertSeeIn('@nav #tab-aliases', 'Aliases (1)')
                 ->click('@nav #tab-aliases')
                 ->whenAvailable('@user-aliases', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 1)
                         ->assertSeeIn('table tbody tr:first-child td:first-child', 'jack.daniels@kolab.org')
                         ->assertMissing('table tfoot');
                 });
 
             // Assert Subscriptions tab
             $browser->assertSeeIn('@nav #tab-subscriptions', 'Subscriptions (3)')
                 ->click('@nav #tab-subscriptions')
                 ->with('@user-subscriptions', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 3)
                         ->assertSeeIn('table tbody tr:nth-child(1) td:first-child', 'User Mailbox')
                         ->assertSeeIn('table tbody tr:nth-child(1) td:last-child', '4,44 CHF')
                         ->assertSeeIn('table tbody tr:nth-child(2) td:first-child', 'Storage Quota 2 GB')
                         ->assertSeeIn('table tbody tr:nth-child(2) td:last-child', '0,00 CHF')
                         ->assertSeeIn('table tbody tr:nth-child(3) td:first-child', 'Groupware Features')
                         ->assertSeeIn('table tbody tr:nth-child(3) td:last-child', '5,55 CHF')
                         ->assertMissing('table tfoot')
                         ->assertMissing('#reset2fa');
                 });
 
             // Assert Domains tab
             $browser->assertSeeIn('@nav #tab-domains', 'Domains (0)')
                 ->click('@nav #tab-domains')
                 ->with('@user-domains', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'There are no domains in this account.');
                 });
 
             // Assert Users tab
             $browser->assertSeeIn('@nav #tab-users', 'Users (0)')
                 ->click('@nav #tab-users')
                 ->with('@user-users', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'There are no users in this account.');
                 });
 
             // Assert Distribution lists tab
             $browser->assertSeeIn('@nav #tab-distlists', 'Distribution lists (0)')
                 ->click('@nav #tab-distlists')
                 ->with('@user-distlists', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'There are no distribution lists in this account.');
+
+            // Assert Settings tab
+            $browser->assertSeeIn('@nav #tab-settings', 'Settings')
+                ->click('@nav #tab-settings')
+                ->whenAvailable('@user-settings form', function (Browser $browser) {
+                    $browser->assertElementsCount('.row', 1)
+                        ->assertSeeIn('.row:first-child label', 'Greylisting')
+                        ->assertSeeIn('.row:first-child .text-success', 'enabled');
                 });
         });
     }
 
     /**
      * Test user info page (continue)
      *
      * @depends testUserInfo
      */
     public function testUserInfo2(): void
     {
         $this->browse(function (Browser $browser) {
             $john = $this->getTestUser('john@kolab.org');
             $page = new UserPage($john->id);
             $discount = Discount::where('code', 'TEST')->first();
             $wallet = $john->wallet();
             $wallet->discount()->associate($discount);
             $wallet->debit(2010);
             $wallet->save();
             $group = $this->getTestGroup('group-test@kolab.org');
             $group->assignToWallet($john->wallets->first());
+            $john->setSetting('greylisting', null);
 
             // Click the managed-by link on Jack's page
             $browser->click('@user-info #manager a')
                 ->on($page);
 
             // Assert main info box content
             $browser->assertSeeIn('@user-info .card-title', $john->email)
                 ->with('@user-info form', function (Browser $browser) use ($john) {
                     $ext_email = $john->getSetting('external_email');
 
                     $browser->assertElementsCount('.row', 9)
                         ->assertSeeIn('.row:nth-child(1) label', 'ID (Created)')
                         ->assertSeeIn('.row:nth-child(1) #userid', "{$john->id} ({$john->created_at})")
                         ->assertSeeIn('.row:nth-child(2) label', 'Status')
                         ->assertSeeIn('.row:nth-child(2) #status span.text-success', 'Active')
                         ->assertSeeIn('.row:nth-child(3) label', 'First Name')
                         ->assertSeeIn('.row:nth-child(3) #first_name', 'John')
                         ->assertSeeIn('.row:nth-child(4) label', 'Last Name')
                         ->assertSeeIn('.row:nth-child(4) #last_name', 'Doe')
                         ->assertSeeIn('.row:nth-child(5) label', 'Organization')
                         ->assertSeeIn('.row:nth-child(5) #organization', 'Kolab Developers')
                         ->assertSeeIn('.row:nth-child(6) label', 'Phone')
                         ->assertSeeIn('.row:nth-child(6) #phone', $john->getSetting('phone'))
                         ->assertSeeIn('.row:nth-child(7) label', 'External Email')
                         ->assertSeeIn('.row:nth-child(7) #external_email a', $ext_email)
                         ->assertAttribute('.row:nth-child(7) #external_email a', 'href', "mailto:$ext_email")
                         ->assertSeeIn('.row:nth-child(8) label', 'Address')
                         ->assertSeeIn('.row:nth-child(8) #billing_address', $john->getSetting('billing_address'))
                         ->assertSeeIn('.row:nth-child(9) label', 'Country')
                         ->assertSeeIn('.row:nth-child(9) #country', 'United States');
                 });
 
             // Some tabs are loaded in background, wait a second
             $browser->pause(500)
                 ->assertElementsCount('@nav a', 6);
 
             // Note: Finances tab is tested in UserFinancesTest.php
             $browser->assertSeeIn('@nav #tab-finances', 'Finances');
 
             // Assert Aliases tab
             $browser->assertSeeIn('@nav #tab-aliases', 'Aliases (1)')
                 ->click('@nav #tab-aliases')
                 ->whenAvailable('@user-aliases', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 1)
                         ->assertSeeIn('table tbody tr:first-child td:first-child', 'john.doe@kolab.org')
                         ->assertMissing('table tfoot');
                 });
 
             // Assert Subscriptions tab
             $browser->assertSeeIn('@nav #tab-subscriptions', 'Subscriptions (3)')
                 ->click('@nav #tab-subscriptions')
                 ->with('@user-subscriptions', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 3)
                         ->assertSeeIn('table tbody tr:nth-child(1) td:first-child', 'User Mailbox')
                         ->assertSeeIn('table tbody tr:nth-child(1) td:last-child', '3,99 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(2) td:first-child', 'Storage Quota 2 GB')
                         ->assertSeeIn('table tbody tr:nth-child(2) td:last-child', '0,00 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(3) td:first-child', 'Groupware Features')
                         ->assertSeeIn('table tbody tr:nth-child(3) td:last-child', '4,99 CHF/month¹')
                         ->assertMissing('table tfoot')
                         ->assertSeeIn('table + .hint', '¹ applied discount: 10% - Test voucher');
                 });
 
             // Assert Domains tab
             $browser->assertSeeIn('@nav #tab-domains', 'Domains (1)')
                 ->click('@nav #tab-domains')
                 ->with('@user-domains table', function (Browser $browser) {
                     $browser->assertElementsCount('tbody tr', 1)
                         ->assertSeeIn('tbody tr:nth-child(1) td:first-child a', 'kolab.org')
                         ->assertVisible('tbody tr:nth-child(1) td:first-child svg.text-success')
                         ->assertMissing('tfoot');
                 });
 
             // Assert Distribution lists tab
             $browser->assertSeeIn('@nav #tab-distlists', 'Distribution lists (1)')
                 ->click('@nav #tab-distlists')
                 ->with('@user-distlists table', function (Browser $browser) {
                     $browser->assertElementsCount('tbody tr', 1)
                         ->assertSeeIn('tbody tr:nth-child(1) td:first-child a', 'group-test@kolab.org')
                         ->assertVisible('tbody tr:nth-child(1) td:first-child svg.text-danger')
                         ->assertMissing('tfoot');
                 });
 
             // Assert Users tab
             $browser->assertSeeIn('@nav #tab-users', 'Users (4)')
                 ->click('@nav #tab-users')
                 ->with('@user-users table', function (Browser $browser) {
                     $browser->assertElementsCount('tbody tr', 4)
                         ->assertSeeIn('tbody tr:nth-child(1) td:first-child a', 'jack@kolab.org')
                         ->assertVisible('tbody tr:nth-child(1) td:first-child svg.text-success')
                         ->assertSeeIn('tbody tr:nth-child(2) td:first-child a', 'joe@kolab.org')
                         ->assertVisible('tbody tr:nth-child(2) td:first-child svg.text-success')
                         ->assertSeeIn('tbody tr:nth-child(3) td:first-child span', 'john@kolab.org')
                         ->assertVisible('tbody tr:nth-child(3) td:first-child svg.text-success')
                         ->assertSeeIn('tbody tr:nth-child(4) td:first-child a', 'ned@kolab.org')
                         ->assertVisible('tbody tr:nth-child(4) td:first-child svg.text-success')
                         ->assertMissing('tfoot');
                 });
         });
 
         // Now we go to Ned's info page, he's a controller on John's wallet
         $this->browse(function (Browser $browser) {
             $ned = $this->getTestUser('ned@kolab.org');
             $beta_sku = Sku::where('title', 'beta')->first();
             $storage_sku = Sku::where('title', 'storage')->first();
             $wallet = $ned->wallet();
 
             // Add an extra storage and beta entitlement with different prices
             Entitlement::create([
                     'wallet_id' => $wallet->id,
                     'sku_id' => $beta_sku->id,
                     'cost' => 5010,
                     'entitleable_id' => $ned->id,
                     'entitleable_type' => User::class
             ]);
             Entitlement::create([
                     'wallet_id' => $wallet->id,
                     'sku_id' => $storage_sku->id,
                     'cost' => 5000,
                     'entitleable_id' => $ned->id,
                     'entitleable_type' => User::class
             ]);
 
             $page = new UserPage($ned->id);
+            $ned->setSetting('greylisting', 'false');
 
             $browser->click('@user-users tbody tr:nth-child(4) td:first-child a')
                 ->on($page);
 
             // Assert main info box content
             $browser->assertSeeIn('@user-info .card-title', $ned->email)
                 ->with('@user-info form', function (Browser $browser) use ($ned) {
                     $browser->assertSeeIn('.row:nth-child(2) label', 'ID (Created)')
                         ->assertSeeIn('.row:nth-child(2) #userid', "{$ned->id} ({$ned->created_at})");
                 });
 
             // Some tabs are loaded in background, wait a second
             $browser->pause(500)
                 ->assertElementsCount('@nav a', 6);
 
             // Note: Finances tab is tested in UserFinancesTest.php
             $browser->assertSeeIn('@nav #tab-finances', 'Finances');
 
             // Assert Aliases tab
             $browser->assertSeeIn('@nav #tab-aliases', 'Aliases (0)')
                 ->click('@nav #tab-aliases')
                 ->whenAvailable('@user-aliases', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'This user has no email aliases.');
                 });
 
             // Assert Subscriptions tab, we expect John's discount here
             $browser->assertSeeIn('@nav #tab-subscriptions', 'Subscriptions (6)')
                 ->click('@nav #tab-subscriptions')
                 ->with('@user-subscriptions', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 6)
                         ->assertSeeIn('table tbody tr:nth-child(1) td:first-child', 'User Mailbox')
                         ->assertSeeIn('table tbody tr:nth-child(1) td:last-child', '3,99 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(2) td:first-child', 'Storage Quota 3 GB')
                         ->assertSeeIn('table tbody tr:nth-child(2) td:last-child', '45,00 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(3) td:first-child', 'Groupware Features')
                         ->assertSeeIn('table tbody tr:nth-child(3) td:last-child', '4,99 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(4) td:first-child', 'Activesync')
                         ->assertSeeIn('table tbody tr:nth-child(4) td:last-child', '0,90 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(5) td:first-child', '2-Factor Authentication')
                         ->assertSeeIn('table tbody tr:nth-child(5) td:last-child', '0,00 CHF/month¹')
                         ->assertSeeIn('table tbody tr:nth-child(6) td:first-child', 'Private Beta (invitation only)')
                         ->assertSeeIn('table tbody tr:nth-child(6) td:last-child', '45,09 CHF/month¹')
                         ->assertMissing('table tfoot')
                         ->assertSeeIn('table + .hint', '¹ applied discount: 10% - Test voucher')
                         ->assertSeeIn('#reset2fa', 'Reset 2-Factor Auth');
                 });
 
             // We don't expect John's domains here
             $browser->assertSeeIn('@nav #tab-domains', 'Domains (0)')
                 ->click('@nav #tab-domains')
                 ->with('@user-domains', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'There are no domains in this account.');
                 });
 
             // We don't expect John's users here
             $browser->assertSeeIn('@nav #tab-users', 'Users (0)')
                 ->click('@nav #tab-users')
                 ->with('@user-users', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'There are no users in this account.');
                 });
 
             // We don't expect John's distribution lists here
             $browser->assertSeeIn('@nav #tab-distlists', 'Distribution lists (0)')
                 ->click('@nav #tab-distlists')
                 ->with('@user-distlists', function (Browser $browser) {
                     $browser->assertElementsCount('table tbody tr', 0)
                         ->assertSeeIn('table tfoot tr td', 'There are no distribution lists in this account.');
+
+            // Assert Settings tab
+            $browser->assertSeeIn('@nav #tab-settings', 'Settings')
+                ->click('@nav #tab-settings')
+                ->whenAvailable('@user-settings form', function (Browser $browser) {
+                    $browser->assertElementsCount('.row', 1)
+                        ->assertSeeIn('.row:first-child label', 'Greylisting')
+                        ->assertSeeIn('.row:first-child .text-danger', 'disabled');
                 });
         });
     }
 
     /**
      * Test editing an external email
      *
      * @depends testUserInfo2
      */
     public function testExternalEmail(): void
     {
         $this->browse(function (Browser $browser) {
             $john = $this->getTestUser('john@kolab.org');
 
             $browser->visit(new UserPage($john->id))
                 ->waitFor('@user-info #external_email button')
                 ->click('@user-info #external_email button')
                 // Test dialog content, and closing it with Cancel button
                 ->with(new Dialog('#email-dialog'), function (Browser $browser) {
                     $browser->assertSeeIn('@title', 'External Email')
                         ->assertFocused('@body input')
                         ->assertValue('@body input', 'john.doe.external@gmail.com')
                         ->assertSeeIn('@button-cancel', 'Cancel')
                         ->assertSeeIn('@button-action', 'Submit')
                         ->click('@button-cancel');
                 })
                 ->assertMissing('#email-dialog')
                 ->click('@user-info #external_email button')
                 // Test email validation error handling, and email update
                 ->with(new Dialog('#email-dialog'), function (Browser $browser) {
                     $browser->type('@body input', 'test')
                         ->click('@button-action')
                         ->waitFor('@body input.is-invalid')
                         ->assertSeeIn(
                             '@body input + .invalid-feedback',
                             'The external email must be a valid email address.'
                         )
                         ->assertToast(Toast::TYPE_ERROR, 'Form validation error')
                         ->type('@body input', 'test@test.com')
                         ->click('@button-action');
                 })
                 ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.')
                 ->assertSeeIn('@user-info #external_email a', 'test@test.com')
                 ->click('@user-info #external_email button')
                 ->with(new Dialog('#email-dialog'), function (Browser $browser) {
                     $browser->assertValue('@body input', 'test@test.com')
                         ->assertMissing('@body input.is-invalid')
                         ->assertMissing('@body input + .invalid-feedback')
                         ->click('@button-cancel');
                 })
                 ->assertSeeIn('@user-info #external_email a', 'test@test.com');
 
             // $john->getSetting() may not work here as it uses internal cache
             // read the value form database
             $current_ext_email = $john->settings()->where('key', 'external_email')->first()->value;
             $this->assertSame('test@test.com', $current_ext_email);
         });
     }
 
     /**
      * Test suspending/unsuspending the user
      */
     public function testSuspendAndUnsuspend(): void
     {
         $this->browse(function (Browser $browser) {
             $john = $this->getTestUser('john@kolab.org');
 
             $browser->visit(new UserPage($john->id))
                 ->assertVisible('@user-info #button-suspend')
                 ->assertMissing('@user-info #button-unsuspend')
                 ->click('@user-info #button-suspend')
                 ->assertToast(Toast::TYPE_SUCCESS, 'User suspended successfully.')
                 ->assertSeeIn('@user-info #status span.text-warning', 'Suspended')
                 ->assertMissing('@user-info #button-suspend')
                 ->click('@user-info #button-unsuspend')
                 ->assertToast(Toast::TYPE_SUCCESS, 'User unsuspended successfully.')
                 ->assertSeeIn('@user-info #status span.text-success', 'Active')
                 ->assertVisible('@user-info #button-suspend')
                 ->assertMissing('@user-info #button-unsuspend');
         });
     }
 
     /**
      * Test resetting 2FA for the user
      */
     public function testReset2FA(): void
     {
         $this->browse(function (Browser $browser) {
             $this->deleteTestUser('userstest1@kolabnow.com');
             $user = $this->getTestUser('userstest1@kolabnow.com');
             $sku2fa = Sku::firstOrCreate(['title' => '2fa']);
             $user->assignSku($sku2fa);
             SecondFactor::seed('userstest1@kolabnow.com');
 
             $browser->visit(new UserPage($user->id))
                 ->click('@nav #tab-subscriptions')
                 ->with('@user-subscriptions', function (Browser $browser) use ($sku2fa) {
                     $browser->waitFor('#reset2fa')
                         ->assertVisible('#sku' . $sku2fa->id);
                 })
                 ->assertSeeIn('@nav #tab-subscriptions', 'Subscriptions (1)')
                 ->click('#reset2fa')
                 ->with(new Dialog('#reset-2fa-dialog'), function (Browser $browser) {
                     $browser->assertSeeIn('@title', '2-Factor Authentication Reset')
                         ->assertSeeIn('@button-cancel', 'Cancel')
                         ->assertSeeIn('@button-action', 'Reset')
                         ->click('@button-action');
                 })
                 ->assertToast(Toast::TYPE_SUCCESS, '2-Factor authentication reset successfully.')
                 ->assertMissing('#sku' . $sku2fa->id)
                 ->assertSeeIn('@nav #tab-subscriptions', 'Subscriptions (0)');
         });
     }
 }
diff --git a/src/tests/Browser/Components/ListInput.php b/src/tests/Browser/Components/ListInput.php
index c5928943..90ba6109 100644
--- a/src/tests/Browser/Components/ListInput.php
+++ b/src/tests/Browser/Components/ListInput.php
@@ -1,104 +1,104 @@
 <?php
 
 namespace Tests\Browser\Components;
 
 use Laravel\Dusk\Component as BaseComponent;
 use PHPUnit\Framework\Assert as PHPUnit;
 
 class ListInput extends BaseComponent
 {
     protected $selector;
 
 
     public function __construct($selector)
     {
         $this->selector = $selector;
     }
 
     /**
      * Get the root selector for the component.
      *
      * @return string
      */
     public function selector()
     {
         return $this->selector;
     }
 
     /**
      * Assert that the browser page contains the component.
      *
      * @param \Laravel\Dusk\Browser $browser
      *
      * @return void
      */
     public function assert($browser)
     {
         $browser->assertVisible($this->selector())
             ->assertVisible('@input')
             ->assertVisible('@add-btn');
     }
 
     /**
      * Get the element shortcuts for the component.
      *
      * @return array
      */
     public function elements()
     {
         return [
             '@input' => '.input-group:first-child input',
             '@add-btn' => '.input-group:first-child a.btn',
         ];
     }
 
     /**
      * Assert list input content
      */
     public function assertListInputValue($browser, array $list)
     {
         if (empty($list)) {
             $browser->assertMissing('.input-group:not(:first-child)');
             return;
         }
 
         foreach ($list as $idx => $value) {
             $selector = '.input-group:nth-child(' . ($idx + 2) . ') input';
             $browser->assertVisible($selector)->assertValue($selector, $value);
         }
     }
 
     /**
      * Add list entry
      */
     public function addListEntry($browser, string $value)
     {
         $browser->type('@input', $value)
             ->click('@add-btn')
             ->assertValue('.input-group:last-child input', $value);
     }
 
     /**
      * Remove list entry
      */
     public function removeListEntry($browser, int $num)
     {
         $selector = '.input-group:nth-child(' . ($num + 1) . ') a.btn';
-        $browser->click($selector)->assertMissing($selector);
+        $browser->click($selector);
     }
 
     /**
      * Assert an error message on the widget
      */
     public function assertFormError($browser, int $num, string $msg, bool $focused = false)
     {
         $selector = '.input-group:nth-child(' . ($num + 1) . ') input.is-invalid';
 
         $browser->assertVisible($selector)
             ->assertSeeIn(' + .invalid-feedback', $msg);
 
         if ($focused) {
             $browser->assertFocused($selector);
         }
     }
 }
diff --git a/src/tests/Browser/DomainTest.php b/src/tests/Browser/DomainTest.php
index 2322bc5f..9bdfed5c 100644
--- a/src/tests/Browser/DomainTest.php
+++ b/src/tests/Browser/DomainTest.php
@@ -1,158 +1,202 @@
 <?php
 
 namespace Tests\Browser;
 
 use App\Domain;
 use App\User;
 use Tests\Browser;
+use Tests\Browser\Components\ListInput;
 use Tests\Browser\Components\Toast;
 use Tests\Browser\Pages\Dashboard;
 use Tests\Browser\Pages\DomainInfo;
 use Tests\Browser\Pages\DomainList;
 use Tests\Browser\Pages\Home;
 use Tests\TestCaseDusk;
 use Illuminate\Foundation\Testing\DatabaseMigrations;
 
 class DomainTest extends TestCaseDusk
 {
 
     /**
      * Test domain info page (unauthenticated)
      */
     public function testDomainInfoUnauth(): void
     {
         // Test that the page requires authentication
         $this->browse(function ($browser) {
             $browser->visit('/domain/123')->on(new Home());
         });
     }
 
     /**
      * Test domain info page (non-existing domain id)
      */
     public function testDomainInfo404(): void
     {
         $this->browse(function ($browser) {
             // FIXME: I couldn't make loginAs() method working
 
             // Note: Here we're also testing that unauthenticated request
             //       is passed to logon form and then "redirected" to the requested page
             $browser->visit('/domain/123')
                 ->on(new Home())
                 ->submitLogon('john@kolab.org', 'simple123')
                 ->assertErrorPage(404);
         });
     }
 
     /**
      * Test domain info page (existing domain)
      *
      * @depends testDomainInfo404
      */
     public function testDomainInfo(): void
     {
         $this->browse(function ($browser) {
             // Unconfirmed domain
             $domain = Domain::where('namespace', 'kolab.org')->first();
             if ($domain->isConfirmed()) {
                 $domain->status ^= Domain::STATUS_CONFIRMED;
                 $domain->save();
             }
 
+            $domain->setSetting('spf_whitelist', \json_encode(['.test.com']));
+
             $browser->visit('/domain/' . $domain->id)
                 ->on(new DomainInfo())
                 ->whenAvailable('@verify', function ($browser) use ($domain) {
                     $browser->assertSeeIn('pre', $domain->namespace)
                         ->assertSeeIn('pre', $domain->hash())
                         ->click('button')
                         ->assertToast(Toast::TYPE_SUCCESS, 'Domain verified successfully.');
 
                         // TODO: Test scenario when a domain confirmation failed
                 })
                 ->whenAvailable('@config', function ($browser) use ($domain) {
                     $browser->assertSeeIn('pre', $domain->namespace);
                 })
                 ->assertMissing('@verify');
 
             // Check that confirmed domain page contains only the config box
             $browser->visit('/domain/' . $domain->id)
                 ->on(new DomainInfo())
                 ->assertMissing('@verify')
                 ->assertPresent('@config');
         });
     }
 
+    /**
+     * Test domain settings
+     */
+    public function testDomainSettings(): void
+    {
+        $this->browse(function ($browser) {
+            $domain = Domain::where('namespace', 'kolab.org')->first();
+            $domain->setSetting('spf_whitelist', \json_encode(['.test.com']));
+
+            $browser->visit('/domain/' . $domain->id)
+                ->on(new DomainInfo())
+                ->assertElementsCount('@nav a', 2)
+                ->assertSeeIn('@nav #tab-general', 'Domain configuration')
+                ->assertSeeIn('@nav #tab-settings', 'Settings')
+                ->click('@nav #tab-settings')
+                ->with('#settings form', function (Browser $browser) {
+                    // Test whitelist widget
+                    $widget = new ListInput('#spf_whitelist');
+
+                    $browser->assertSeeIn('div.row:nth-child(1) label', 'SPF Whitelist')
+                        ->assertVisible('div.row:nth-child(1) .list-input')
+                        ->with($widget, function (Browser $browser) {
+                            $browser->assertListInputValue(['.test.com'])
+                                ->assertValue('@input', '')
+                                ->addListEntry('invalid domain');
+                        })
+                        ->click('button[type=submit]')
+                        ->assertToast(Toast::TYPE_ERROR, 'Form validation error')
+                        ->with($widget, function (Browser $browser) {
+                            $err = 'The entry format is invalid. Expected a domain name starting with a dot.';
+                            $browser->assertFormError(2, $err, false)
+                                ->removeListEntry(2)
+                                ->removeListEntry(1)
+                                ->addListEntry('.new.domain.tld');
+                        })
+                        ->click('button[type=submit]')
+                        ->assertToast(Toast::TYPE_SUCCESS, 'Domain settings updated successfully.');
+                });
+        });
+    }
+
     /**
      * Test domains list page (unauthenticated)
      */
     public function testDomainListUnauth(): void
     {
         // Test that the page requires authentication
         $this->browse(function ($browser) {
             $browser->visit('/logout')
                 ->visit('/domains')
                 ->on(new Home());
         });
     }
 
     /**
      * Test domains list page
      *
      * @depends testDomainListUnauth
      */
     public function testDomainList(): void
     {
         $this->browse(function ($browser) {
             // Login the user
             $browser->visit('/login')
                 ->on(new Home())
                 ->submitLogon('john@kolab.org', 'simple123', true)
                 // On dashboard click the "Domains" link
                 ->on(new Dashboard())
                 ->assertSeeIn('@links a.link-domains', 'Domains')
                 ->click('@links a.link-domains')
                 // On Domains List page click the domain entry
                 ->on(new DomainList())
                 ->waitFor('@table tbody tr')
                 ->assertVisible('@table tbody tr:first-child td:first-child svg.fa-globe.text-success')
                 ->assertText('@table tbody tr:first-child td:first-child svg title', 'Active')
                 ->assertSeeIn('@table tbody tr:first-child td:first-child', 'kolab.org')
                 ->assertMissing('@table tfoot')
                 ->click('@table tbody tr:first-child td:first-child a')
                 // On Domain Info page verify that's the clicked domain
                 ->on(new DomainInfo())
                 ->whenAvailable('@config', function ($browser) {
                     $browser->assertSeeIn('pre', 'kolab.org');
                 });
         });
 
         // TODO: Test domains list acting as Ned (John's "delegatee")
     }
 
     /**
      * Test domains list page (user with no domains)
      */
     public function testDomainListEmpty(): void
     {
         $this->browse(function ($browser) {
             // Login the user
             $browser->visit('/login')
                 ->on(new Home())
                 ->submitLogon('jack@kolab.org', 'simple123', true)
                 ->on(new Dashboard())
                 ->assertVisible('@links a.link-profile')
                 ->assertMissing('@links a.link-domains')
                 ->assertMissing('@links a.link-users')
                 ->assertMissing('@links a.link-wallet');
 /*
                 // On dashboard click the "Domains" link
                 ->assertSeeIn('@links a.link-domains', 'Domains')
                 ->click('@links a.link-domains')
                 // On Domains List page click the domain entry
                 ->on(new DomainList())
                 ->assertMissing('@table tbody')
                 ->assertSeeIn('tfoot td', 'There are no domains in this account.');
 */
         });
     }
 }
diff --git a/src/tests/Browser/Pages/Admin/Domain.php b/src/tests/Browser/Pages/Admin/Domain.php
index 5c8d3d63..a7f9a20a 100644
--- a/src/tests/Browser/Pages/Admin/Domain.php
+++ b/src/tests/Browser/Pages/Admin/Domain.php
@@ -1,58 +1,59 @@
 <?php
 
 namespace Tests\Browser\Pages\Admin;
 
 use Laravel\Dusk\Page;
 
 class Domain extends Page
 {
     protected $domainid;
 
     /**
      * Object constructor.
      *
      * @param int $domainid Domain Id
      */
     public function __construct($domainid)
     {
         $this->domainid = $domainid;
     }
 
     /**
      * Get the URL for the page.
      *
      * @return string
      */
     public function url(): string
     {
         return '/domain/' . $this->domainid;
     }
 
     /**
      * Assert that the browser is on the page.
      *
      * @param \Laravel\Dusk\Browser $browser The browser object
      *
      * @return void
      */
     public function assert($browser): void
     {
         $browser->waitForLocation($this->url())
             ->waitFor('@domain-info');
     }
 
     /**
      * Get the element shortcuts for the page.
      *
      * @return array
      */
     public function elements(): array
     {
         return [
             '@app' => '#app',
             '@domain-info' => '#domain-info',
             '@nav' => 'ul.nav-tabs',
             '@domain-config' => '#domain-config',
+            '@domain-settings' => '#domain-settings',
         ];
     }
 }
diff --git a/src/tests/Browser/Pages/Admin/User.php b/src/tests/Browser/Pages/Admin/User.php
index 120c67bd..63dead31 100644
--- a/src/tests/Browser/Pages/Admin/User.php
+++ b/src/tests/Browser/Pages/Admin/User.php
@@ -1,64 +1,65 @@
 <?php
 
 namespace Tests\Browser\Pages\Admin;
 
 use Laravel\Dusk\Page;
 
 class User extends Page
 {
     protected $userid;
 
     /**
      * Object constructor.
      *
      * @param int $userid User Id
      */
     public function __construct($userid)
     {
         $this->userid = $userid;
     }
 
     /**
      * Get the URL for the page.
      *
      * @return string
      */
     public function url(): string
     {
         return '/user/' . $this->userid;
     }
 
     /**
      * Assert that the browser is on the page.
      *
      * @param \Laravel\Dusk\Browser $browser The browser object
      *
      * @return void
      */
     public function assert($browser): void
     {
         $browser->waitForLocation($this->url())
             ->waitUntilMissing('@app .app-loader')
             ->waitFor('@user-info');
     }
 
     /**
      * Get the element shortcuts for the page.
      *
      * @return array
      */
     public function elements(): array
     {
         return [
             '@app' => '#app',
             '@user-info' => '#user-info',
             '@nav' => 'ul.nav-tabs',
             '@user-finances' => '#user-finances',
             '@user-aliases' => '#user-aliases',
             '@user-subscriptions' => '#user-subscriptions',
             '@user-distlists' => '#user-distlists',
             '@user-domains' => '#user-domains',
             '@user-users' => '#user-users',
+            '@user-settings' => '#user-settings',
         ];
     }
 }
diff --git a/src/tests/Browser/Pages/DomainInfo.php b/src/tests/Browser/Pages/DomainInfo.php
index b7f989d3..13820c3c 100644
--- a/src/tests/Browser/Pages/DomainInfo.php
+++ b/src/tests/Browser/Pages/DomainInfo.php
@@ -1,45 +1,47 @@
 <?php
 
 namespace Tests\Browser\Pages;
 
 use Laravel\Dusk\Page;
 
 class DomainInfo extends Page
 {
     /**
      * Get the URL for the page.
      *
      * @return string
      */
     public function url(): string
     {
         return '';
     }
 
     /**
      * Assert that the browser is on the page.
      *
      * @param \Laravel\Dusk\Browser $browser The browser object
      *
      * @return void
      */
     public function assert($browser)
     {
         $browser->waitUntilMissing('@app .app-loader');
     }
 
     /**
      * Get the element shortcuts for the page.
      *
      * @return array
      */
     public function elements(): array
     {
         return [
             '@app' => '#app',
             '@config' => '#domain-config',
-            '@verify' => '#domain-verify',
+            '@nav' => 'ul.nav-tabs',
+            '@settings' => '#settings',
             '@status' => '#status-box',
+            '@verify' => '#domain-verify',
         ];
     }
 }
diff --git a/src/tests/Browser/Pages/UserInfo.php b/src/tests/Browser/Pages/UserInfo.php
index 53046e82..d67112ce 100644
--- a/src/tests/Browser/Pages/UserInfo.php
+++ b/src/tests/Browser/Pages/UserInfo.php
@@ -1,47 +1,49 @@
 <?php
 
 namespace Tests\Browser\Pages;
 
 use Laravel\Dusk\Page;
 
 class UserInfo extends Page
 {
     /**
      * Get the URL for the page.
      *
      * @return string
      */
     public function url(): string
     {
         return '';
     }
 
     /**
      * Assert that the browser is on the page.
      *
      * @param \Laravel\Dusk\Browser $browser The browser object
      *
      * @return void
      */
     public function assert($browser)
     {
         $browser->waitFor('@form')
             ->waitUntilMissing('.app-loader');
     }
 
     /**
      * Get the element shortcuts for the page.
      *
      * @return array
      */
     public function elements(): array
     {
         return [
             '@app' => '#app',
             '@form' => '#user-info form',
+            '@nav' => 'ul.nav-tabs',
             '@packages' => '#user-packages',
+            '@settings' => '#settings',
             '@skus' => '#user-skus',
             '@status' => '#status-box',
         ];
     }
 }
diff --git a/src/tests/Browser/UsersTest.php b/src/tests/Browser/UsersTest.php
index 7a8905c2..54e294dd 100644
--- a/src/tests/Browser/UsersTest.php
+++ b/src/tests/Browser/UsersTest.php
@@ -1,713 +1,740 @@
 <?php
 
 namespace Tests\Browser;
 
 use App\Discount;
 use App\Entitlement;
 use App\Sku;
 use App\User;
 use App\UserAlias;
 use Tests\Browser;
 use Tests\Browser\Components\Dialog;
 use Tests\Browser\Components\ListInput;
 use Tests\Browser\Components\QuotaInput;
 use Tests\Browser\Components\Toast;
 use Tests\Browser\Pages\Dashboard;
 use Tests\Browser\Pages\Home;
 use Tests\Browser\Pages\UserInfo;
 use Tests\Browser\Pages\UserList;
 use Tests\TestCaseDusk;
 use Illuminate\Foundation\Testing\DatabaseMigrations;
 
 class UsersTest extends TestCaseDusk
 {
     private $profile = [
         'first_name' => 'John',
         'last_name' => 'Doe',
         'organization' => 'Kolab Developers',
     ];
 
     /**
      * {@inheritDoc}
      */
     public function setUp(): void
     {
         parent::setUp();
 
         $this->deleteTestUser('julia.roberts@kolab.org');
 
         $john = User::where('email', 'john@kolab.org')->first();
         $john->setSettings($this->profile);
         UserAlias::where('user_id', $john->id)
             ->where('alias', 'john.test@kolab.org')->delete();
 
         Entitlement::where('entitleable_id', $john->id)->whereIn('cost', [25, 100])->delete();
         Entitlement::where('cost', '>=', 5000)->delete();
 
         $wallet = $john->wallets()->first();
         $wallet->discount()->dissociate();
         $wallet->save();
 
         $this->clearBetaEntitlements();
         $this->clearMeetEntitlements();
     }
 
     /**
      * {@inheritDoc}
      */
     public function tearDown(): void
     {
         $this->deleteTestUser('julia.roberts@kolab.org');
 
         $john = User::where('email', 'john@kolab.org')->first();
         $john->setSettings($this->profile);
         UserAlias::where('user_id', $john->id)
             ->where('alias', 'john.test@kolab.org')->delete();
 
         Entitlement::where('entitleable_id', $john->id)->whereIn('cost', [25, 100])->delete();
         Entitlement::where('cost', '>=', 5000)->delete();
 
         $wallet = $john->wallets()->first();
         $wallet->discount()->dissociate();
         $wallet->save();
 
         $this->clearBetaEntitlements();
         $this->clearMeetEntitlements();
 
         parent::tearDown();
     }
 
     /**
      * Test user info page (unauthenticated)
      */
     public function testInfoUnauth(): void
     {
         // Test that the page requires authentication
         $this->browse(function (Browser $browser) {
             $user = User::where('email', 'john@kolab.org')->first();
 
             $browser->visit('/user/' . $user->id)->on(new Home());
         });
     }
 
     /**
      * Test users list page (unauthenticated)
      */
     public function testListUnauth(): void
     {
         // Test that the page requires authentication
         $this->browse(function (Browser $browser) {
             $browser->visit('/users')->on(new Home());
         });
     }
 
     /**
      * Test users list page
      */
     public function testList(): void
     {
         // Test that the page requires authentication
         $this->browse(function (Browser $browser) {
             $browser->visit(new Home())
                 ->submitLogon('john@kolab.org', 'simple123', true)
                 ->on(new Dashboard())
                 ->assertSeeIn('@links .link-users', 'User accounts')
                 ->click('@links .link-users')
                 ->on(new UserList())
                 ->whenAvailable('@table', function (Browser $browser) {
                     $browser->waitFor('tbody tr')
                         ->assertElementsCount('tbody tr', 4)
                         ->assertSeeIn('tbody tr:nth-child(1) a', 'jack@kolab.org')
                         ->assertSeeIn('tbody tr:nth-child(2) a', 'joe@kolab.org')
                         ->assertSeeIn('tbody tr:nth-child(3) a', 'john@kolab.org')
                         ->assertSeeIn('tbody tr:nth-child(4) a', 'ned@kolab.org')
                         ->assertMissing('tfoot');
                 });
         });
     }
 
     /**
      * Test user account editing page (not profile page)
      *
      * @depends testList
      */
     public function testInfo(): void
     {
         $this->browse(function (Browser $browser) {
             $browser->on(new UserList())
                 ->click('@table tr:nth-child(3) a')
                 ->on(new UserInfo())
                 ->assertSeeIn('#user-info .card-title', 'User account')
                 ->with('@form', function (Browser $browser) {
                     // Assert form content
                     $browser->assertSeeIn('div.row:nth-child(1) label', 'Status')
                         ->assertSeeIn('div.row:nth-child(1) #status', 'Active')
                         ->assertFocused('div.row:nth-child(2) input')
                         ->assertSeeIn('div.row:nth-child(2) label', 'First Name')
                         ->assertValue('div.row:nth-child(2) input[type=text]', $this->profile['first_name'])
                         ->assertSeeIn('div.row:nth-child(3) label', 'Last Name')
                         ->assertValue('div.row:nth-child(3) input[type=text]', $this->profile['last_name'])
                         ->assertSeeIn('div.row:nth-child(4) label', 'Organization')
                         ->assertValue('div.row:nth-child(4) input[type=text]', $this->profile['organization'])
                         ->assertSeeIn('div.row:nth-child(5) label', 'Email')
                         ->assertValue('div.row:nth-child(5) input[type=text]', 'john@kolab.org')
                         ->assertDisabled('div.row:nth-child(5) input[type=text]')
                         ->assertSeeIn('div.row:nth-child(6) label', 'Email Aliases')
                         ->assertVisible('div.row:nth-child(6) .list-input')
                         ->with(new ListInput('#aliases'), function (Browser $browser) {
                             $browser->assertListInputValue(['john.doe@kolab.org'])
                                 ->assertValue('@input', '');
                         })
                         ->assertSeeIn('div.row:nth-child(7) label', 'Password')
                         ->assertValue('div.row:nth-child(7) input[type=password]', '')
                         ->assertSeeIn('div.row:nth-child(8) label', 'Confirm Password')
                         ->assertValue('div.row:nth-child(8) input[type=password]', '')
                         ->assertSeeIn('button[type=submit]', 'Submit')
                         // Clear some fields and submit
                         ->vueClear('#first_name')
                         ->vueClear('#last_name')
                         ->click('button[type=submit]');
                 })
                 ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.')
                 ->on(new UserList())
                 ->click('@table tr:nth-child(3) a')
                 ->on(new UserInfo())
                 ->assertSeeIn('#user-info .card-title', 'User account')
                 ->with('@form', function (Browser $browser) {
                     // Test error handling (password)
                     $browser->type('#password', 'aaaaaa')
                         ->vueClear('#password_confirmation')
                         ->click('button[type=submit]')
                         ->waitFor('#password + .invalid-feedback')
                         ->assertSeeIn('#password + .invalid-feedback', 'The password confirmation does not match.')
                         ->assertFocused('#password')
                         ->assertToast(Toast::TYPE_ERROR, 'Form validation error');
 
                     // TODO: Test password change
 
                     // Test form error handling (aliases)
                     $browser->vueClear('#password')
                         ->vueClear('#password_confirmation')
                         ->with(new ListInput('#aliases'), function (Browser $browser) {
                             $browser->addListEntry('invalid address');
                         })
                         ->click('button[type=submit]')
                         ->assertToast(Toast::TYPE_ERROR, 'Form validation error');
 
                     $browser->with(new ListInput('#aliases'), function (Browser $browser) {
                         $browser->assertFormError(2, 'The specified alias is invalid.', false);
                     });
 
                     // Test adding aliases
                     $browser->with(new ListInput('#aliases'), function (Browser $browser) {
                         $browser->removeListEntry(2)
                             ->addListEntry('john.test@kolab.org');
                     })
                         ->click('button[type=submit]')
                         ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.');
                 })
                 ->on(new UserList())
                 ->click('@table tr:nth-child(3) a')
                 ->on(new UserInfo());
 
             $john = User::where('email', 'john@kolab.org')->first();
             $alias = UserAlias::where('user_id', $john->id)->where('alias', 'john.test@kolab.org')->first();
             $this->assertTrue(!empty($alias));
 
             // Test subscriptions
             $browser->with('@form', function (Browser $browser) {
                 $browser->assertSeeIn('div.row:nth-child(9) label', 'Subscriptions')
                     ->assertVisible('@skus.row:nth-child(9)')
                     ->with('@skus', function ($browser) {
                         $browser->assertElementsCount('tbody tr', 6)
                             // Mailbox SKU
                             ->assertSeeIn('tbody tr:nth-child(1) td.name', 'User Mailbox')
                             ->assertSeeIn('tbody tr:nth-child(1) td.price', '4,44 CHF/month')
                             ->assertChecked('tbody tr:nth-child(1) td.selection input')
                             ->assertDisabled('tbody tr:nth-child(1) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(1) td.buttons button',
                                 'Just a mailbox'
                             )
                             // Storage SKU
                             ->assertSeeIn('tbody tr:nth-child(2) td.name', 'Storage Quota')
                             ->assertSeeIn('tr:nth-child(2) td.price', '0,00 CHF/month')
                             ->assertChecked('tbody tr:nth-child(2) td.selection input')
                             ->assertDisabled('tbody tr:nth-child(2) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(2) td.buttons button',
                                 'Some wiggle room'
                             )
                             ->with(new QuotaInput('tbody tr:nth-child(2) .range-input'), function ($browser) {
                                 $browser->assertQuotaValue(2)->setQuotaValue(3);
                             })
                             ->assertSeeIn('tr:nth-child(2) td.price', '0,25 CHF/month')
                             // groupware SKU
                             ->assertSeeIn('tbody tr:nth-child(3) td.name', 'Groupware Features')
                             ->assertSeeIn('tbody tr:nth-child(3) td.price', '5,55 CHF/month')
                             ->assertChecked('tbody tr:nth-child(3) td.selection input')
                             ->assertEnabled('tbody tr:nth-child(3) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(3) td.buttons button',
                                 'Groupware functions like Calendar, Tasks, Notes, etc.'
                             )
                             // ActiveSync SKU
                             ->assertSeeIn('tbody tr:nth-child(4) td.name', 'Activesync')
                             ->assertSeeIn('tbody tr:nth-child(4) td.price', '1,00 CHF/month')
                             ->assertNotChecked('tbody tr:nth-child(4) td.selection input')
                             ->assertEnabled('tbody tr:nth-child(4) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(4) td.buttons button',
                                 'Mobile synchronization'
                             )
                             // 2FA SKU
                             ->assertSeeIn('tbody tr:nth-child(5) td.name', '2-Factor Authentication')
                             ->assertSeeIn('tbody tr:nth-child(5) td.price', '0,00 CHF/month')
                             ->assertNotChecked('tbody tr:nth-child(5) td.selection input')
                             ->assertEnabled('tbody tr:nth-child(5) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(5) td.buttons button',
                                 'Two factor authentication for webmail and administration panel'
                             )
                             // Meet SKU
                             ->assertSeeIn('tbody tr:nth-child(6) td.name', 'Voice & Video Conferencing (public beta)')
                             ->assertSeeIn('tbody tr:nth-child(6) td.price', '0,00 CHF/month')
                             ->assertNotChecked('tbody tr:nth-child(6) td.selection input')
                             ->assertEnabled('tbody tr:nth-child(6) td.selection input')
                             ->assertTip(
                                 'tbody tr:nth-child(6) td.buttons button',
                                 'Video conferencing tool'
                             )
                             ->click('tbody tr:nth-child(4) td.selection input');
                     })
                     ->assertMissing('@skus table + .hint')
                     ->click('button[type=submit]')
                     ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.');
             })
                 ->on(new UserList())
                 ->click('@table tr:nth-child(3) a')
                 ->on(new UserInfo());
 
             $expected = ['activesync', 'groupware', 'mailbox', 'storage', 'storage', 'storage'];
             $this->assertUserEntitlements($john, $expected);
 
             // Test subscriptions interaction
             $browser->with('@form', function (Browser $browser) {
                 $browser->with('@skus', function ($browser) {
                     // Uncheck 'groupware', expect activesync unchecked
                     $browser->click('#sku-input-groupware')
                         ->assertNotChecked('#sku-input-groupware')
                         ->assertNotChecked('#sku-input-activesync')
                         ->assertEnabled('#sku-input-activesync')
                         ->assertNotReadonly('#sku-input-activesync')
                         // Check 'activesync', expect an alert
                         ->click('#sku-input-activesync')
                         ->assertDialogOpened('Activesync requires Groupware Features.')
                         ->acceptDialog()
                         ->assertNotChecked('#sku-input-activesync')
                         // Check 'meet', expect an alert
                         ->click('#sku-input-meet')
                         ->assertDialogOpened('Voice & Video Conferencing (public beta) requires Groupware Features.')
                         ->acceptDialog()
                         ->assertNotChecked('#sku-input-meet')
                         // Check '2FA', expect 'activesync' unchecked and readonly
                         ->click('#sku-input-2fa')
                         ->assertChecked('#sku-input-2fa')
                         ->assertNotChecked('#sku-input-activesync')
                         ->assertReadonly('#sku-input-activesync')
                         // Uncheck '2FA'
                         ->click('#sku-input-2fa')
                         ->assertNotChecked('#sku-input-2fa')
                         ->assertNotReadonly('#sku-input-activesync');
                 });
             });
         });
     }
 
+    /**
+     * Test user settings tab
+     *
+     * @depends testInfo
+     */
+    public function testUserSettings(): void
+    {
+        $john = $this->getTestUser('john@kolab.org');
+        $john->setSetting('greylisting', null);
+
+        $this->browse(function (Browser $browser) {
+            $browser->on(new UserInfo())
+                ->assertElementsCount('@nav a', 2)
+                ->assertSeeIn('@nav #tab-general', 'General')
+                ->assertSeeIn('@nav #tab-settings', 'Settings')
+                ->click('@nav #tab-settings')
+                ->with('#settings form', function (Browser $browser) {
+                    $browser->assertSeeIn('div.row:nth-child(1) label', 'Greylisting')
+                        ->click('div.row:nth-child(1) input[type=checkbox]:checked')
+                        ->click('button[type=submit]')
+                        ->assertToast(Toast::TYPE_SUCCESS, 'User settings updated successfully.');
+                });
+        });
+
+        $this->assertSame('false', $john->fresh()->getSetting('greylisting'));
+    }
+
     /**
      * Test user adding page
      *
      * @depends testList
      */
     public function testNewUser(): void
     {
         $this->browse(function (Browser $browser) {
             $browser->visit(new UserList())
                 ->assertSeeIn('button.create-user', 'Create user')
                 ->click('button.create-user')
                 ->on(new UserInfo())
                 ->assertSeeIn('#user-info .card-title', 'New user account')
                 ->with('@form', function (Browser $browser) {
                     // Assert form content
                     $browser->assertFocused('div.row:nth-child(1) input')
                         ->assertSeeIn('div.row:nth-child(1) label', 'First Name')
                         ->assertValue('div.row:nth-child(1) input[type=text]', '')
                         ->assertSeeIn('div.row:nth-child(2) label', 'Last Name')
                         ->assertValue('div.row:nth-child(2) input[type=text]', '')
                         ->assertSeeIn('div.row:nth-child(3) label', 'Organization')
                         ->assertValue('div.row:nth-child(3) input[type=text]', '')
                         ->assertSeeIn('div.row:nth-child(4) label', 'Email')
                         ->assertValue('div.row:nth-child(4) input[type=text]', '')
                         ->assertEnabled('div.row:nth-child(4) input[type=text]')
                         ->assertSeeIn('div.row:nth-child(5) label', 'Email Aliases')
                         ->assertVisible('div.row:nth-child(5) .list-input')
                         ->with(new ListInput('#aliases'), function (Browser $browser) {
                             $browser->assertListInputValue([])
                                 ->assertValue('@input', '');
                         })
                         ->assertSeeIn('div.row:nth-child(6) label', 'Password')
                         ->assertValue('div.row:nth-child(6) input[type=password]', '')
                         ->assertSeeIn('div.row:nth-child(7) label', 'Confirm Password')
                         ->assertValue('div.row:nth-child(7) input[type=password]', '')
                         ->assertSeeIn('div.row:nth-child(8) label', 'Package')
                         // assert packages list widget, select "Lite Account"
                         ->with('@packages', function ($browser) {
                             $browser->assertElementsCount('tbody tr', 2)
                                 ->assertSeeIn('tbody tr:nth-child(1)', 'Groupware Account')
                                 ->assertSeeIn('tbody tr:nth-child(2)', 'Lite Account')
                                 ->assertSeeIn('tbody tr:nth-child(1) .price', '9,99 CHF/month')
                                 ->assertSeeIn('tbody tr:nth-child(2) .price', '4,44 CHF/month')
                                 ->assertChecked('tbody tr:nth-child(1) input')
                                 ->click('tbody tr:nth-child(2) input')
                                 ->assertNotChecked('tbody tr:nth-child(1) input')
                                 ->assertChecked('tbody tr:nth-child(2) input');
                         })
                         ->assertMissing('@packages table + .hint')
                         ->assertSeeIn('button[type=submit]', 'Submit');
 
                     // Test browser-side required fields and error handling
                     $browser->click('button[type=submit]')
                         ->assertFocused('#email')
                         ->type('#email', 'invalid email')
                         ->click('button[type=submit]')
                         ->assertFocused('#password')
                         ->type('#password', 'simple123')
                         ->click('button[type=submit]')
                         ->assertFocused('#password_confirmation')
                         ->type('#password_confirmation', 'simple')
                         ->click('button[type=submit]')
                         ->assertToast(Toast::TYPE_ERROR, 'Form validation error')
                         ->assertSeeIn('#email + .invalid-feedback', 'The specified email is invalid.')
                         ->assertSeeIn('#password + .invalid-feedback', 'The password confirmation does not match.');
                 });
 
             // Test form error handling (aliases)
             $browser->with('@form', function (Browser $browser) {
                 $browser->type('#email', 'julia.roberts@kolab.org')
                     ->type('#password_confirmation', 'simple123')
                     ->with(new ListInput('#aliases'), function (Browser $browser) {
                         $browser->addListEntry('invalid address');
                     })
                     ->click('button[type=submit]')
                     ->assertToast(Toast::TYPE_ERROR, 'Form validation error')
                     ->with(new ListInput('#aliases'), function (Browser $browser) {
                         $browser->assertFormError(1, 'The specified alias is invalid.', false);
                     });
             });
 
             // Successful account creation
             $browser->with('@form', function (Browser $browser) {
                 $browser->type('#first_name', 'Julia')
                     ->type('#last_name', 'Roberts')
                     ->type('#organization', 'Test Org')
                     ->with(new ListInput('#aliases'), function (Browser $browser) {
                         $browser->removeListEntry(1)
                             ->addListEntry('julia.roberts2@kolab.org');
                     })
                     ->click('button[type=submit]');
             })
             ->assertToast(Toast::TYPE_SUCCESS, 'User created successfully.')
             // check redirection to users list
             ->on(new UserList())
                 ->whenAvailable('@table', function (Browser $browser) {
                     $browser->assertElementsCount('tbody tr', 5)
                         ->assertSeeIn('tbody tr:nth-child(4) a', 'julia.roberts@kolab.org');
                 });
 
             $julia = User::where('email', 'julia.roberts@kolab.org')->first();
             $alias = UserAlias::where('user_id', $julia->id)->where('alias', 'julia.roberts2@kolab.org')->first();
             $this->assertTrue(!empty($alias));
             $this->assertUserEntitlements($julia, ['mailbox', 'storage', 'storage']);
             $this->assertSame('Julia', $julia->getSetting('first_name'));
             $this->assertSame('Roberts', $julia->getSetting('last_name'));
             $this->assertSame('Test Org', $julia->getSetting('organization'));
 
             // Some additional tests for the list input widget
             $browser->click('tbody tr:nth-child(4) a')
                 ->on(new UserInfo())
                 ->with(new ListInput('#aliases'), function (Browser $browser) {
                     $browser->assertListInputValue(['julia.roberts2@kolab.org'])
                         ->addListEntry('invalid address')
                         ->type('.input-group:nth-child(2) input', '@kolab.org');
                 })
                 ->click('button[type=submit]')
                 ->assertToast(Toast::TYPE_ERROR, 'Form validation error')
                 ->with(new ListInput('#aliases'), function (Browser $browser) {
                     $browser->assertVisible('.input-group:nth-child(2) input.is-invalid')
                         ->assertVisible('.input-group:nth-child(3) input.is-invalid')
                         ->type('.input-group:nth-child(2) input', 'julia.roberts3@kolab.org')
                         ->type('.input-group:nth-child(3) input', 'julia.roberts4@kolab.org');
                 })
                 ->click('button[type=submit]')
                 ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.');
 
             $julia = User::where('email', 'julia.roberts@kolab.org')->first();
             $aliases = $julia->aliases()->orderBy('alias')->get()->pluck('alias')->all();
             $this->assertSame(['julia.roberts3@kolab.org', 'julia.roberts4@kolab.org'], $aliases);
         });
     }
 
     /**
      * Test user delete
      *
      * @depends testNewUser
      */
     public function testDeleteUser(): void
     {
         // First create a new user
         $john = $this->getTestUser('john@kolab.org');
         $julia = $this->getTestUser('julia.roberts@kolab.org');
         $package_kolab = \App\Package::where('title', 'kolab')->first();
         $john->assignPackage($package_kolab, $julia);
 
         // Test deleting non-controller user
         $this->browse(function (Browser $browser) use ($julia) {
             $browser->visit('/user/' . $julia->id)
                 ->on(new UserInfo())
                 ->assertSeeIn('button.button-delete', 'Delete user')
                 ->click('button.button-delete')
                 ->with(new Dialog('#delete-warning'), function (Browser $browser) {
                     $browser->assertSeeIn('@title', 'Delete julia.roberts@kolab.org')
                         ->assertFocused('@button-cancel')
                         ->assertSeeIn('@button-cancel', 'Cancel')
                         ->assertSeeIn('@button-action', 'Delete')
                         ->click('@button-cancel');
                 })
                 ->waitUntilMissing('#delete-warning')
                 ->click('button.button-delete')
                 ->with(new Dialog('#delete-warning'), function (Browser $browser) {
                     $browser->click('@button-action');
                 })
                 ->waitUntilMissing('#delete-warning')
                 ->assertToast(Toast::TYPE_SUCCESS, 'User deleted successfully.')
                 ->on(new UserList())
                 ->with('@table', function (Browser $browser) {
                     $browser->assertElementsCount('tbody tr', 4)
                         ->assertSeeIn('tbody tr:nth-child(1) a', 'jack@kolab.org')
                         ->assertSeeIn('tbody tr:nth-child(2) a', 'joe@kolab.org')
                         ->assertSeeIn('tbody tr:nth-child(3) a', 'john@kolab.org')
                         ->assertSeeIn('tbody tr:nth-child(4) a', 'ned@kolab.org');
                 });
 
             $julia = User::where('email', 'julia.roberts@kolab.org')->first();
             $this->assertTrue(empty($julia));
         });
 
         // Test that non-controller user cannot see/delete himself on the users list
         $this->browse(function (Browser $browser) {
             $browser->visit('/logout')
                 ->on(new Home())
                 ->submitLogon('jack@kolab.org', 'simple123', true)
                 ->visit('/users')
                 ->assertErrorPage(403);
         });
 
         // Test that controller user (Ned) can see all the users
         $this->browse(function (Browser $browser) {
             $browser->visit('/logout')
                 ->on(new Home())
                 ->submitLogon('ned@kolab.org', 'simple123', true)
                 ->visit(new UserList())
                 ->whenAvailable('@table', function (Browser $browser) {
                     $browser->assertElementsCount('tbody tr', 4);
                 });
 
                 // TODO: Test the delete action in details
         });
 
         // TODO: Test what happens with the logged in user session after he's been deleted by another user
     }
 
     /**
      * Test discounted sku/package prices in the UI
      */
     public function testDiscountedPrices(): void
     {
         // Add 10% discount
         $discount = Discount::where('code', 'TEST')->first();
         $john = User::where('email', 'john@kolab.org')->first();
         $wallet = $john->wallet();
         $wallet->discount()->associate($discount);
         $wallet->save();
 
         // SKUs on user edit page
         $this->browse(function (Browser $browser) {
             $browser->visit('/logout')
                 ->on(new Home())
                 ->submitLogon('john@kolab.org', 'simple123', true)
                 ->visit(new UserList())
                 ->waitFor('@table tr:nth-child(2)')
                 ->click('@table tr:nth-child(2) a') // joe@kolab.org
                 ->on(new UserInfo())
                 ->with('@form', function (Browser $browser) {
                     $browser->whenAvailable('@skus', function (Browser $browser) {
                         $quota_input = new QuotaInput('tbody tr:nth-child(2) .range-input');
                         $browser->waitFor('tbody tr')
                             ->assertElementsCount('tbody tr', 6)
                             // Mailbox SKU
                             ->assertSeeIn('tbody tr:nth-child(1) td.price', '3,99 CHF/month¹')
                             // Storage SKU
                             ->assertSeeIn('tr:nth-child(2) td.price', '0,00 CHF/month¹')
                             ->with($quota_input, function (Browser $browser) {
                                 $browser->setQuotaValue(100);
                             })
                             ->assertSeeIn('tr:nth-child(2) td.price', '22,05 CHF/month¹')
                             // groupware SKU
                             ->assertSeeIn('tbody tr:nth-child(3) td.price', '4,99 CHF/month¹')
                             // ActiveSync SKU
                             ->assertSeeIn('tbody tr:nth-child(4) td.price', '0,90 CHF/month¹')
                             // 2FA SKU
                             ->assertSeeIn('tbody tr:nth-child(5) td.price', '0,00 CHF/month¹');
                     })
                     ->assertSeeIn('@skus table + .hint', '¹ applied discount: 10% - Test voucher');
                 });
         });
 
         // Packages on new user page
         $this->browse(function (Browser $browser) {
             $browser->visit(new UserList())
                 ->click('button.create-user')
                 ->on(new UserInfo())
                 ->with('@form', function (Browser $browser) {
                     $browser->whenAvailable('@packages', function (Browser $browser) {
                         $browser->assertElementsCount('tbody tr', 2)
                             ->assertSeeIn('tbody tr:nth-child(1) .price', '8,99 CHF/month¹') // Groupware
                             ->assertSeeIn('tbody tr:nth-child(2) .price', '3,99 CHF/month¹'); // Lite
                     })
                     ->assertSeeIn('@packages table + .hint', '¹ applied discount: 10% - Test voucher');
                 });
         });
 
         // Test using entitlement cost instead of the SKU cost
         $this->browse(function (Browser $browser) use ($wallet) {
             $joe = User::where('email', 'joe@kolab.org')->first();
             $beta_sku = Sku::where('title', 'beta')->first();
             $storage_sku = Sku::where('title', 'storage')->first();
 
             // Add an extra storage and beta entitlement with different prices
             Entitlement::create([
                     'wallet_id' => $wallet->id,
                     'sku_id' => $beta_sku->id,
                     'cost' => 5010,
                     'entitleable_id' => $joe->id,
                     'entitleable_type' => User::class
             ]);
             Entitlement::create([
                     'wallet_id' => $wallet->id,
                     'sku_id' => $storage_sku->id,
                     'cost' => 5000,
                     'entitleable_id' => $joe->id,
                     'entitleable_type' => User::class
             ]);
 
             $browser->visit('/user/' . $joe->id)
                 ->on(new UserInfo())
                 ->with('@form', function (Browser $browser) {
                     $browser->whenAvailable('@skus', function (Browser $browser) {
                         $quota_input = new QuotaInput('tbody tr:nth-child(2) .range-input');
                         $browser->waitFor('tbody tr')
                             // Beta SKU
                             ->assertSeeIn('tbody tr:nth-child(7) td.price', '45,09 CHF/month¹')
                             // Storage SKU
                             ->assertSeeIn('tr:nth-child(2) td.price', '45,00 CHF/month¹')
                             ->with($quota_input, function (Browser $browser) {
                                 $browser->setQuotaValue(4);
                             })
                             ->assertSeeIn('tr:nth-child(2) td.price', '45,22 CHF/month¹')
                             ->with($quota_input, function (Browser $browser) {
                                 $browser->setQuotaValue(2);
                             })
                             ->assertSeeIn('tr:nth-child(2) td.price', '0,00 CHF/month¹');
                     })
                     ->assertSeeIn('@skus table + .hint', '¹ applied discount: 10% - Test voucher');
                 });
         });
     }
 
     /**
      * Test beta entitlements
      *
      * @depends testList
      */
     public function testBetaEntitlements(): void
     {
         $this->browse(function (Browser $browser) {
             $john = User::where('email', 'john@kolab.org')->first();
             $sku = Sku::where('title', 'beta')->first();
             $john->assignSku($sku);
 
             $browser->visit('/user/' . $john->id)
                 ->on(new UserInfo())
                 ->with('@skus', function ($browser) {
                     $browser->assertElementsCount('tbody tr', 8)
                         // Meet SKU
                         ->assertSeeIn('tbody tr:nth-child(6) td.name', 'Voice & Video Conferencing (public beta)')
                         ->assertSeeIn('tr:nth-child(6) td.price', '0,00 CHF/month')
                         ->assertNotChecked('tbody tr:nth-child(6) td.selection input')
                         ->assertEnabled('tbody tr:nth-child(6) td.selection input')
                         ->assertTip(
                             'tbody tr:nth-child(6) td.buttons button',
                             'Video conferencing tool'
                         )
                         // Beta SKU
                         ->assertSeeIn('tbody tr:nth-child(7) td.name', 'Private Beta (invitation only)')
                         ->assertSeeIn('tbody tr:nth-child(7) td.price', '0,00 CHF/month')
                         ->assertChecked('tbody tr:nth-child(7) td.selection input')
                         ->assertEnabled('tbody tr:nth-child(7) td.selection input')
                         ->assertTip(
                             'tbody tr:nth-child(7) td.buttons button',
                             'Access to the private beta program subscriptions'
                         )
                         // Distlist SKU
                         ->assertSeeIn('tbody tr:nth-child(8) td.name', 'Distribution lists')
                         ->assertSeeIn('tr:nth-child(8) td.price', '0,00 CHF/month')
                         ->assertNotChecked('tbody tr:nth-child(8) td.selection input')
                         ->assertEnabled('tbody tr:nth-child(8) td.selection input')
                         ->assertTip(
                             'tbody tr:nth-child(8) td.buttons button',
                             'Access to mail distribution lists'
                         )
                         // Check Distlist, Uncheck Beta, expect Distlist unchecked
                         ->click('#sku-input-distlist')
                         ->click('#sku-input-beta')
                         ->assertNotChecked('#sku-input-beta')
                         ->assertNotChecked('#sku-input-distlist')
                         // Click Distlist expect an alert
                         ->click('#sku-input-distlist')
                         ->assertDialogOpened('Distribution lists requires Private Beta (invitation only).')
                         ->acceptDialog()
                         // Enable Beta and Distlist and submit
                         ->click('#sku-input-beta')
                         ->click('#sku-input-distlist');
                 })
                 ->click('button[type=submit]')
                 ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.');
 
             $expected = ['beta', 'distlist', 'groupware', 'mailbox', 'storage', 'storage'];
             $this->assertUserEntitlements($john, $expected);
 
             $browser->visit('/user/' . $john->id)
                 ->on(new UserInfo())
                 ->click('#sku-input-beta')
                 ->click('button[type=submit]')
                 ->assertToast(Toast::TYPE_SUCCESS, 'User data updated successfully.');
 
             $expected = ['groupware', 'mailbox', 'storage', 'storage'];
             $this->assertUserEntitlements($john, $expected);
         });
 
         // TODO: Test that the Distlist SKU is not available for users that aren't a group account owners
         // TODO: Test that entitlements change has immediate effect on the available items in dashboard
         //       i.e. does not require a page reload nor re-login.
     }
 }
diff --git a/src/tests/Feature/Controller/DomainsTest.php b/src/tests/Feature/Controller/DomainsTest.php
index 05e3e8d0..bb38bd44 100644
--- a/src/tests/Feature/Controller/DomainsTest.php
+++ b/src/tests/Feature/Controller/DomainsTest.php
@@ -1,242 +1,321 @@
 <?php
 
 namespace Tests\Feature\Controller;
 
 use App\Domain;
 use App\Entitlement;
 use App\Sku;
 use App\User;
 use App\Wallet;
 use Illuminate\Support\Str;
 use Tests\TestCase;
 
 class DomainsTest extends TestCase
 {
     /**
      * {@inheritDoc}
      */
     public function setUp(): void
     {
         parent::setUp();
 
         $this->deleteTestUser('test1@domainscontroller.com');
         $this->deleteTestDomain('domainscontroller.com');
     }
 
     public function tearDown(): void
     {
         $this->deleteTestUser('test1@domainscontroller.com');
         $this->deleteTestDomain('domainscontroller.com');
 
+        $domain = $this->getTestDomain('kolab.org');
+        $domain->settings()->whereIn('key', ['spf_whitelist'])->delete();
+
         parent::tearDown();
     }
 
     /**
      * Test domain confirm request
      */
     public function testConfirm(): void
     {
         $sku_domain = Sku::where('title', 'domain-hosting')->first();
         $john = $this->getTestUser('john@kolab.org');
         $ned = $this->getTestUser('ned@kolab.org');
         $user = $this->getTestUser('test1@domainscontroller.com');
         $domain = $this->getTestDomain('domainscontroller.com', [
                 'status' => Domain::STATUS_NEW,
                 'type' => Domain::TYPE_EXTERNAL,
         ]);
 
         Entitlement::create([
                 'wallet_id' => $user->wallets()->first()->id,
                 'sku_id' => $sku_domain->id,
                 'entitleable_id' => $domain->id,
                 'entitleable_type' => Domain::class
         ]);
 
         $response = $this->actingAs($user)->get("api/v4/domains/{$domain->id}/confirm");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertCount(2, $json);
         $this->assertEquals('error', $json['status']);
         $this->assertEquals('Domain ownership verification failed.', $json['message']);
 
         $domain->status |= Domain::STATUS_CONFIRMED;
         $domain->save();
 
         $response = $this->actingAs($user)->get("api/v4/domains/{$domain->id}/confirm");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertEquals('success', $json['status']);
         $this->assertEquals('Domain verified successfully.', $json['message']);
         $this->assertTrue(is_array($json['statusInfo']));
 
         // Not authorized access
         $response = $this->actingAs($john)->get("api/v4/domains/{$domain->id}/confirm");
         $response->assertStatus(403);
 
         // Authorized access by additional account controller
         $domain = $this->getTestDomain('kolab.org');
         $response = $this->actingAs($ned)->get("api/v4/domains/{$domain->id}/confirm");
         $response->assertStatus(200);
     }
 
     /**
      * Test fetching domains list
      */
     public function testIndex(): void
     {
         // User with no domains
         $user = $this->getTestUser('test1@domainscontroller.com');
         $response = $this->actingAs($user)->get("api/v4/domains");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertSame([], $json);
 
         // User with custom domain(s)
         $john = $this->getTestUser('john@kolab.org');
         $ned = $this->getTestUser('ned@kolab.org');
 
         $response = $this->actingAs($john)->get("api/v4/domains");
         $response->assertStatus(200);
 
         $json = $response->json();
         $this->assertCount(1, $json);
         $this->assertSame('kolab.org', $json[0]['namespace']);
         // Values below are tested by Unit tests
         $this->assertArrayHasKey('isConfirmed', $json[0]);
         $this->assertArrayHasKey('isDeleted', $json[0]);
         $this->assertArrayHasKey('isVerified', $json[0]);
         $this->assertArrayHasKey('isSuspended', $json[0]);
         $this->assertArrayHasKey('isActive', $json[0]);
         $this->assertArrayHasKey('isLdapReady', $json[0]);
 
         $response = $this->actingAs($ned)->get("api/v4/domains");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertCount(1, $json);
         $this->assertSame('kolab.org', $json[0]['namespace']);
     }
 
+    /**
+     * Test domain config update (POST /api/v4/domains/<domain>/config)
+     */
+    public function testSetConfig(): void
+    {
+        $john = $this->getTestUser('john@kolab.org');
+        $jack = $this->getTestUser('jack@kolab.org');
+        $domain = $this->getTestDomain('kolab.org');
+        $domain->setSetting('spf_whitelist', null);
+
+        // Test unknown domain id
+        $post = ['spf_whitelist' => []];
+        $response = $this->actingAs($john)->post("/api/v4/domains/123/config", $post);
+        $json = $response->json();
+
+        $response->assertStatus(404);
+
+        // Test access by user not being a wallet controller
+        $post = ['spf_whitelist' => []];
+        $response = $this->actingAs($jack)->post("/api/v4/domains/{$domain->id}/config", $post);
+        $json = $response->json();
+
+        $response->assertStatus(403);
+
+        $this->assertSame('error', $json['status']);
+        $this->assertSame("Access denied", $json['message']);
+        $this->assertCount(2, $json);
+
+        // Test some invalid data
+        $post = ['grey' => 1];
+        $response = $this->actingAs($john)->post("/api/v4/domains/{$domain->id}/config", $post);
+        $response->assertStatus(422);
+
+        $json = $response->json();
+
+        $this->assertSame('error', $json['status']);
+        $this->assertCount(2, $json);
+        $this->assertCount(1, $json['errors']);
+        $this->assertSame('The requested configuration parameter is not supported.', $json['errors']['grey']);
+
+        $this->assertNull($domain->fresh()->getSetting('spf_whitelist'));
+
+        // Test some valid data
+        $post = ['spf_whitelist' => ['.test.domain.com']];
+        $response = $this->actingAs($john)->post("/api/v4/domains/{$domain->id}/config", $post);
+
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertCount(2, $json);
+        $this->assertSame('success', $json['status']);
+        $this->assertSame('Domain settings updated successfully.', $json['message']);
+
+        $expected = \json_encode($post['spf_whitelist']);
+        $this->assertSame($expected, $domain->fresh()->getSetting('spf_whitelist'));
+
+        // Test input validation
+        $post = ['spf_whitelist' => ['aaa']];
+        $response = $this->actingAs($john)->post("/api/v4/domains/{$domain->id}/config", $post);
+        $response->assertStatus(422);
+
+        $json = $response->json();
+
+        $this->assertCount(2, $json);
+        $this->assertSame('error', $json['status']);
+        $this->assertCount(1, $json['errors']);
+        $this->assertSame(
+            'The entry format is invalid. Expected a domain name starting with a dot.',
+            $json['errors']['spf_whitelist'][0]
+        );
+
+        $this->assertSame($expected, $domain->fresh()->getSetting('spf_whitelist'));
+    }
+
     /**
      * Test fetching domain info
      */
     public function testShow(): void
     {
         $sku_domain = Sku::where('title', 'domain-hosting')->first();
         $user = $this->getTestUser('test1@domainscontroller.com');
         $domain = $this->getTestDomain('domainscontroller.com', [
                 'status' => Domain::STATUS_NEW,
                 'type' => Domain::TYPE_EXTERNAL,
         ]);
 
         Entitlement::create([
                 'wallet_id' => $user->wallets()->first()->id,
                 'sku_id' => $sku_domain->id,
                 'entitleable_id' => $domain->id,
                 'entitleable_type' => Domain::class
         ]);
 
         $response = $this->actingAs($user)->get("api/v4/domains/{$domain->id}");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertEquals($domain->id, $json['id']);
         $this->assertEquals($domain->namespace, $json['namespace']);
         $this->assertEquals($domain->status, $json['status']);
         $this->assertEquals($domain->type, $json['type']);
         $this->assertSame($domain->hash(Domain::HASH_TEXT), $json['hash_text']);
         $this->assertSame($domain->hash(Domain::HASH_CNAME), $json['hash_cname']);
         $this->assertSame($domain->hash(Domain::HASH_CODE), $json['hash_code']);
-        $this->assertCount(4, $json['config']);
-        $this->assertTrue(strpos(implode("\n", $json['config']), $domain->namespace) !== false);
+        $this->assertSame([], $json['config']['spf_whitelist']);
+        $this->assertCount(4, $json['mx']);
+        $this->assertTrue(strpos(implode("\n", $json['mx']), $domain->namespace) !== false);
         $this->assertCount(8, $json['dns']);
         $this->assertTrue(strpos(implode("\n", $json['dns']), $domain->namespace) !== false);
         $this->assertTrue(strpos(implode("\n", $json['dns']), $domain->hash()) !== false);
         $this->assertTrue(is_array($json['statusInfo']));
         // Values below are tested by Unit tests
         $this->assertArrayHasKey('isConfirmed', $json);
         $this->assertArrayHasKey('isDeleted', $json);
         $this->assertArrayHasKey('isVerified', $json);
         $this->assertArrayHasKey('isSuspended', $json);
         $this->assertArrayHasKey('isActive', $json);
         $this->assertArrayHasKey('isLdapReady', $json);
 
         $john = $this->getTestUser('john@kolab.org');
         $ned = $this->getTestUser('ned@kolab.org');
         $jack = $this->getTestUser('jack@kolab.org');
 
         // Not authorized - Other account domain
         $response = $this->actingAs($john)->get("api/v4/domains/{$domain->id}");
         $response->assertStatus(403);
 
         $domain = $this->getTestDomain('kolab.org');
 
         // Ned is an additional controller on kolab.org's wallet
         $response = $this->actingAs($ned)->get("api/v4/domains/{$domain->id}");
         $response->assertStatus(200);
 
         // Jack has no entitlement/control over kolab.org
         $response = $this->actingAs($jack)->get("api/v4/domains/{$domain->id}");
         $response->assertStatus(403);
     }
 
     /**
      * Test fetching domain status (GET /api/v4/domains/<domain-id>/status)
      * and forcing setup process update (?refresh=1)
      *
      * @group dns
      */
     public function testStatus(): void
     {
         $john = $this->getTestUser('john@kolab.org');
         $jack = $this->getTestUser('jack@kolab.org');
         $domain = $this->getTestDomain('kolab.org');
 
         // Test unauthorized access
         $response = $this->actingAs($jack)->get("/api/v4/domains/{$domain->id}/status");
         $response->assertStatus(403);
 
         $domain->status = Domain::STATUS_NEW | Domain::STATUS_ACTIVE | Domain::STATUS_LDAP_READY;
         $domain->save();
 
         // Get domain status
         $response = $this->actingAs($john)->get("/api/v4/domains/{$domain->id}/status");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertFalse($json['isVerified']);
         $this->assertFalse($json['isReady']);
         $this->assertCount(4, $json['process']);
         $this->assertSame('domain-verified', $json['process'][2]['label']);
         $this->assertSame(false, $json['process'][2]['state']);
         $this->assertTrue(empty($json['status']));
         $this->assertTrue(empty($json['message']));
 
         // Now "reboot" the process and verify the domain
         $response = $this->actingAs($john)->get("/api/v4/domains/{$domain->id}/status?refresh=1");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertTrue($json['isVerified']);
         $this->assertTrue($json['isReady']);
         $this->assertCount(4, $json['process']);
         $this->assertSame('domain-verified', $json['process'][2]['label']);
         $this->assertSame(true, $json['process'][2]['state']);
         $this->assertSame('domain-confirmed', $json['process'][3]['label']);
         $this->assertSame(true, $json['process'][3]['state']);
         $this->assertSame('success', $json['status']);
         $this->assertSame('Setup process finished successfully.', $json['message']);
 
         // TODO: Test completing all process steps
     }
 }
diff --git a/src/tests/Feature/Controller/UsersTest.php b/src/tests/Feature/Controller/UsersTest.php
index b434f5a0..0e70de4b 100644
--- a/src/tests/Feature/Controller/UsersTest.php
+++ b/src/tests/Feature/Controller/UsersTest.php
@@ -1,1269 +1,1340 @@
 <?php
 
 namespace Tests\Feature\Controller;
 
 use App\Discount;
 use App\Domain;
 use App\Http\Controllers\API\V4\UsersController;
 use App\Package;
 use App\Sku;
 use App\User;
 use App\Wallet;
 use Carbon\Carbon;
 use Illuminate\Support\Facades\Queue;
 use Illuminate\Support\Str;
 use Tests\TestCase;
 
 class UsersTest extends TestCase
 {
     /**
      * {@inheritDoc}
      */
     public function setUp(): void
     {
         parent::setUp();
 
         $this->deleteTestUser('jane@kolabnow.com');
         $this->deleteTestUser('UsersControllerTest1@userscontroller.com');
         $this->deleteTestUser('UsersControllerTest2@userscontroller.com');
         $this->deleteTestUser('UsersControllerTest3@userscontroller.com');
         $this->deleteTestUser('UserEntitlement2A@UserEntitlement.com');
         $this->deleteTestUser('john2.doe2@kolab.org');
         $this->deleteTestUser('deleted@kolab.org');
         $this->deleteTestUser('deleted@kolabnow.com');
         $this->deleteTestDomain('userscontroller.com');
         $this->deleteTestGroup('group-test@kolabnow.com');
         $this->deleteTestGroup('group-test@kolab.org');
 
         $user = $this->getTestUser('john@kolab.org');
         $wallet = $user->wallets()->first();
         $wallet->discount()->dissociate();
         $wallet->settings()->whereIn('key', ['mollie_id', 'stripe_id'])->delete();
         $wallet->save();
         $user->status |= User::STATUS_IMAP_READY;
         $user->save();
     }
 
     /**
      * {@inheritDoc}
      */
     public function tearDown(): void
     {
         $this->deleteTestUser('jane@kolabnow.com');
         $this->deleteTestUser('UsersControllerTest1@userscontroller.com');
         $this->deleteTestUser('UsersControllerTest2@userscontroller.com');
         $this->deleteTestUser('UsersControllerTest3@userscontroller.com');
         $this->deleteTestUser('UserEntitlement2A@UserEntitlement.com');
         $this->deleteTestUser('john2.doe2@kolab.org');
         $this->deleteTestUser('deleted@kolab.org');
         $this->deleteTestUser('deleted@kolabnow.com');
         $this->deleteTestDomain('userscontroller.com');
         $this->deleteTestGroup('group-test@kolabnow.com');
         $this->deleteTestGroup('group-test@kolab.org');
 
         $user = $this->getTestUser('john@kolab.org');
         $wallet = $user->wallets()->first();
         $wallet->discount()->dissociate();
         $wallet->settings()->whereIn('key', ['mollie_id', 'stripe_id'])->delete();
         $wallet->save();
+        $user->settings()->whereIn('key', ['greylisting'])->delete();
         $user->status |= User::STATUS_IMAP_READY;
         $user->save();
 
         parent::tearDown();
     }
 
     /**
      * Test user deleting (DELETE /api/v4/users/<id>)
      */
     public function testDestroy(): void
     {
         // First create some users/accounts to delete
         $package_kolab = \App\Package::where('title', 'kolab')->first();
         $package_domain = \App\Package::where('title', 'domain-hosting')->first();
 
         $john = $this->getTestUser('john@kolab.org');
         $user1 = $this->getTestUser('UsersControllerTest1@userscontroller.com');
         $user2 = $this->getTestUser('UsersControllerTest2@userscontroller.com');
         $user3 = $this->getTestUser('UsersControllerTest3@userscontroller.com');
         $domain = $this->getTestDomain('userscontroller.com', [
                 'status' => Domain::STATUS_NEW,
                 'type' => Domain::TYPE_PUBLIC,
         ]);
         $user1->assignPackage($package_kolab);
         $domain->assignPackage($package_domain, $user1);
         $user1->assignPackage($package_kolab, $user2);
         $user1->assignPackage($package_kolab, $user3);
 
         // Test unauth access
         $response = $this->delete("api/v4/users/{$user2->id}");
         $response->assertStatus(401);
 
         // Test access to other user/account
         $response = $this->actingAs($john)->delete("api/v4/users/{$user2->id}");
         $response->assertStatus(403);
         $response = $this->actingAs($john)->delete("api/v4/users/{$user1->id}");
         $response->assertStatus(403);
         $json = $response->json();
 
         $this->assertSame('error', $json['status']);
         $this->assertSame("Access denied", $json['message']);
         $this->assertCount(2, $json);
 
         // Test that non-controller cannot remove himself
         $response = $this->actingAs($user3)->delete("api/v4/users/{$user3->id}");
         $response->assertStatus(403);
 
         // Test removing a non-controller user
         $response = $this->actingAs($user1)->delete("api/v4/users/{$user3->id}");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertEquals('success', $json['status']);
         $this->assertEquals('User deleted successfully.', $json['message']);
 
         // Test removing self (an account with users)
         $response = $this->actingAs($user1)->delete("api/v4/users/{$user1->id}");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertEquals('success', $json['status']);
         $this->assertEquals('User deleted successfully.', $json['message']);
     }
 
     /**
      * Test user deleting (DELETE /api/v4/users/<id>)
      */
     public function testDestroyByController(): void
     {
         // Create an account with additional controller - $user2
         $package_kolab = \App\Package::where('title', 'kolab')->first();
         $package_domain = \App\Package::where('title', 'domain-hosting')->first();
         $user1 = $this->getTestUser('UsersControllerTest1@userscontroller.com');
         $user2 = $this->getTestUser('UsersControllerTest2@userscontroller.com');
         $user3 = $this->getTestUser('UsersControllerTest3@userscontroller.com');
         $domain = $this->getTestDomain('userscontroller.com', [
                 'status' => Domain::STATUS_NEW,
                 'type' => Domain::TYPE_PUBLIC,
         ]);
         $user1->assignPackage($package_kolab);
         $domain->assignPackage($package_domain, $user1);
         $user1->assignPackage($package_kolab, $user2);
         $user1->assignPackage($package_kolab, $user3);
         $user1->wallets()->first()->addController($user2);
 
         // TODO/FIXME:
         //   For now controller can delete himself, as well as
         //   the whole account he has control to, including the owner
         //   Probably he should not be able to do none of those
         //   However, this is not 0-regression scenario as we
         //   do not fully support additional controllers.
 
         //$response = $this->actingAs($user2)->delete("api/v4/users/{$user2->id}");
         //$response->assertStatus(403);
 
         $response = $this->actingAs($user2)->delete("api/v4/users/{$user3->id}");
         $response->assertStatus(200);
 
         $response = $this->actingAs($user2)->delete("api/v4/users/{$user1->id}");
         $response->assertStatus(200);
 
         // Note: More detailed assertions in testDestroy() above
 
         $this->assertTrue($user1->fresh()->trashed());
         $this->assertTrue($user2->fresh()->trashed());
         $this->assertTrue($user3->fresh()->trashed());
     }
 
     /**
      * Test user listing (GET /api/v4/users)
      */
     public function testIndex(): void
     {
         // Test unauth access
         $response = $this->get("api/v4/users");
         $response->assertStatus(401);
 
         $jack = $this->getTestUser('jack@kolab.org');
         $joe = $this->getTestUser('joe@kolab.org');
         $john = $this->getTestUser('john@kolab.org');
         $ned = $this->getTestUser('ned@kolab.org');
 
         $response = $this->actingAs($jack)->get("/api/v4/users");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertCount(0, $json);
 
         $response = $this->actingAs($john)->get("/api/v4/users");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertCount(4, $json);
         $this->assertSame($jack->email, $json[0]['email']);
         $this->assertSame($joe->email, $json[1]['email']);
         $this->assertSame($john->email, $json[2]['email']);
         $this->assertSame($ned->email, $json[3]['email']);
         // Values below are tested by Unit tests
         $this->assertArrayHasKey('isDeleted', $json[0]);
         $this->assertArrayHasKey('isSuspended', $json[0]);
         $this->assertArrayHasKey('isActive', $json[0]);
         $this->assertArrayHasKey('isLdapReady', $json[0]);
         $this->assertArrayHasKey('isImapReady', $json[0]);
 
         $response = $this->actingAs($ned)->get("/api/v4/users");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertCount(4, $json);
         $this->assertSame($jack->email, $json[0]['email']);
         $this->assertSame($joe->email, $json[1]['email']);
         $this->assertSame($john->email, $json[2]['email']);
         $this->assertSame($ned->email, $json[3]['email']);
     }
 
     /**
      * Test fetching user data/profile (GET /api/v4/users/<user-id>)
      */
     public function testShow(): void
     {
         $userA = $this->getTestUser('UserEntitlement2A@UserEntitlement.com');
 
         // Test getting profile of self
         $response = $this->actingAs($userA)->get("/api/v4/users/{$userA->id}");
 
         $json = $response->json();
 
         $response->assertStatus(200);
         $this->assertEquals($userA->id, $json['id']);
         $this->assertEquals($userA->email, $json['email']);
         $this->assertTrue(is_array($json['statusInfo']));
         $this->assertTrue(is_array($json['settings']));
         $this->assertTrue(is_array($json['aliases']));
+        $this->assertTrue($json['config']['greylisting']);
         $this->assertSame([], $json['skus']);
         // Values below are tested by Unit tests
         $this->assertArrayHasKey('isDeleted', $json);
         $this->assertArrayHasKey('isSuspended', $json);
         $this->assertArrayHasKey('isActive', $json);
         $this->assertArrayHasKey('isLdapReady', $json);
         $this->assertArrayHasKey('isImapReady', $json);
 
         $john = $this->getTestUser('john@kolab.org');
         $jack = $this->getTestUser('jack@kolab.org');
         $ned = $this->getTestUser('ned@kolab.org');
 
         // Test unauthorized access to a profile of other user
         $response = $this->actingAs($jack)->get("/api/v4/users/{$userA->id}");
         $response->assertStatus(403);
 
         // Test authorized access to a profile of other user
         // Ned: Additional account controller
         $response = $this->actingAs($ned)->get("/api/v4/users/{$john->id}");
         $response->assertStatus(200);
         $response = $this->actingAs($ned)->get("/api/v4/users/{$jack->id}");
         $response->assertStatus(200);
 
         // John: Account owner
         $response = $this->actingAs($john)->get("/api/v4/users/{$jack->id}");
         $response->assertStatus(200);
         $response = $this->actingAs($john)->get("/api/v4/users/{$ned->id}");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $storage_sku = Sku::where('title', 'storage')->first();
         $groupware_sku = Sku::where('title', 'groupware')->first();
         $mailbox_sku = Sku::where('title', 'mailbox')->first();
         $secondfactor_sku = Sku::where('title', '2fa')->first();
 
         $this->assertCount(5, $json['skus']);
 
         $this->assertSame(2, $json['skus'][$storage_sku->id]['count']);
         $this->assertSame([0,0], $json['skus'][$storage_sku->id]['costs']);
         $this->assertSame(1, $json['skus'][$groupware_sku->id]['count']);
         $this->assertSame([555], $json['skus'][$groupware_sku->id]['costs']);
         $this->assertSame(1, $json['skus'][$mailbox_sku->id]['count']);
         $this->assertSame([444], $json['skus'][$mailbox_sku->id]['costs']);
         $this->assertSame(1, $json['skus'][$secondfactor_sku->id]['count']);
         $this->assertSame([0], $json['skus'][$secondfactor_sku->id]['costs']);
     }
 
     /**
      * Test fetching user status (GET /api/v4/users/<user-id>/status)
      * and forcing setup process update (?refresh=1)
      *
      * @group imap
      * @group dns
      */
     public function testStatus(): void
     {
         Queue::fake();
 
         $john = $this->getTestUser('john@kolab.org');
         $jack = $this->getTestUser('jack@kolab.org');
 
         // Test unauthorized access
         $response = $this->actingAs($jack)->get("/api/v4/users/{$john->id}/status");
         $response->assertStatus(403);
 
         if ($john->isImapReady()) {
             $john->status ^= User::STATUS_IMAP_READY;
             $john->save();
         }
 
         // Get user status
         $response = $this->actingAs($john)->get("/api/v4/users/{$john->id}/status");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertFalse($json['isImapReady']);
         $this->assertFalse($json['isReady']);
         $this->assertCount(7, $json['process']);
         $this->assertSame('user-imap-ready', $json['process'][2]['label']);
         $this->assertSame(false, $json['process'][2]['state']);
         $this->assertTrue(empty($json['status']));
         $this->assertTrue(empty($json['message']));
 
         // Make sure the domain is confirmed (other test might unset that status)
         $domain = $this->getTestDomain('kolab.org');
         $domain->status |= Domain::STATUS_CONFIRMED;
         $domain->save();
 
         // Now "reboot" the process and verify the user in imap synchronously
         $response = $this->actingAs($john)->get("/api/v4/users/{$john->id}/status?refresh=1");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertTrue($json['isImapReady']);
         $this->assertTrue($json['isReady']);
         $this->assertCount(7, $json['process']);
         $this->assertSame('user-imap-ready', $json['process'][2]['label']);
         $this->assertSame(true, $json['process'][2]['state']);
         $this->assertSame('success', $json['status']);
         $this->assertSame('Setup process finished successfully.', $json['message']);
 
         Queue::size(1);
 
         // Test case for when the verify job is dispatched to the worker
         $john->refresh();
         $john->status ^= User::STATUS_IMAP_READY;
         $john->save();
 
         \config(['imap.admin_password' => null]);
 
         $response = $this->actingAs($john)->get("/api/v4/users/{$john->id}/status?refresh=1");
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertFalse($json['isImapReady']);
         $this->assertFalse($json['isReady']);
         $this->assertSame('success', $json['status']);
         $this->assertSame('waiting', $json['processState']);
         $this->assertSame('Setup process has been pushed. Please wait.', $json['message']);
 
         Queue::assertPushed(\App\Jobs\User\VerifyJob::class, 1);
     }
 
     /**
      * Test UsersController::statusInfo()
      */
     public function testStatusInfo(): void
     {
         $user = $this->getTestUser('UsersControllerTest1@userscontroller.com');
         $domain = $this->getTestDomain('userscontroller.com', [
                 'status' => Domain::STATUS_NEW,
                 'type' => Domain::TYPE_PUBLIC,
         ]);
 
         $user->created_at = Carbon::now();
         $user->status = User::STATUS_NEW;
         $user->save();
 
         $result = UsersController::statusInfo($user);
 
         $this->assertFalse($result['isReady']);
         $this->assertSame([], $result['skus']);
         $this->assertCount(3, $result['process']);
         $this->assertSame('user-new', $result['process'][0]['label']);
         $this->assertSame(true, $result['process'][0]['state']);
         $this->assertSame('user-ldap-ready', $result['process'][1]['label']);
         $this->assertSame(false, $result['process'][1]['state']);
         $this->assertSame('user-imap-ready', $result['process'][2]['label']);
         $this->assertSame(false, $result['process'][2]['state']);
         $this->assertSame('running', $result['processState']);
 
         $user->created_at = Carbon::now()->subSeconds(181);
         $user->save();
 
         $result = UsersController::statusInfo($user);
 
         $this->assertSame('failed', $result['processState']);
 
         $user->status |= User::STATUS_LDAP_READY | User::STATUS_IMAP_READY;
         $user->save();
 
         $result = UsersController::statusInfo($user);
 
         $this->assertTrue($result['isReady']);
         $this->assertCount(3, $result['process']);
         $this->assertSame('user-new', $result['process'][0]['label']);
         $this->assertSame(true, $result['process'][0]['state']);
         $this->assertSame('user-ldap-ready', $result['process'][1]['label']);
         $this->assertSame(true, $result['process'][1]['state']);
         $this->assertSame('user-imap-ready', $result['process'][2]['label']);
         $this->assertSame(true, $result['process'][2]['state']);
         $this->assertSame('done', $result['processState']);
 
         $domain->status |= Domain::STATUS_VERIFIED;
         $domain->type = Domain::TYPE_EXTERNAL;
         $domain->save();
 
         $result = UsersController::statusInfo($user);
 
         $this->assertFalse($result['isReady']);
         $this->assertSame([], $result['skus']);
         $this->assertCount(7, $result['process']);
         $this->assertSame('user-new', $result['process'][0]['label']);
         $this->assertSame(true, $result['process'][0]['state']);
         $this->assertSame('user-ldap-ready', $result['process'][1]['label']);
         $this->assertSame(true, $result['process'][1]['state']);
         $this->assertSame('user-imap-ready', $result['process'][2]['label']);
         $this->assertSame(true, $result['process'][2]['state']);
         $this->assertSame('domain-new', $result['process'][3]['label']);
         $this->assertSame(true, $result['process'][3]['state']);
         $this->assertSame('domain-ldap-ready', $result['process'][4]['label']);
         $this->assertSame(false, $result['process'][4]['state']);
         $this->assertSame('domain-verified', $result['process'][5]['label']);
         $this->assertSame(true, $result['process'][5]['state']);
         $this->assertSame('domain-confirmed', $result['process'][6]['label']);
         $this->assertSame(false, $result['process'][6]['state']);
 
         // Test 'skus' property
         $user->assignSku(Sku::where('title', 'beta')->first());
 
         $result = UsersController::statusInfo($user);
 
         $this->assertSame(['beta'], $result['skus']);
 
         $user->assignSku(Sku::where('title', 'meet')->first());
 
         $result = UsersController::statusInfo($user);
 
         $this->assertSame(['beta', 'meet'], $result['skus']);
 
         $user->assignSku(Sku::where('title', 'meet')->first());
 
         $result = UsersController::statusInfo($user);
 
         $this->assertSame(['beta', 'meet'], $result['skus']);
     }
 
+    /**
+     * Test user config update (POST /api/v4/users/<user>/config)
+     */
+    public function testSetConfig(): void
+    {
+        $jack = $this->getTestUser('jack@kolab.org');
+        $john = $this->getTestUser('john@kolab.org');
+
+        $john->setSetting('greylisting', null);
+
+        // Test unknown user id
+        $post = ['greylisting' => 1];
+        $response = $this->actingAs($john)->post("/api/v4/users/123/config", $post);
+        $json = $response->json();
+
+        $response->assertStatus(404);
+
+        // Test access by user not being a wallet controller
+        $post = ['greylisting' => 1];
+        $response = $this->actingAs($jack)->post("/api/v4/users/{$john->id}/config", $post);
+        $json = $response->json();
+
+        $response->assertStatus(403);
+
+        $this->assertSame('error', $json['status']);
+        $this->assertSame("Access denied", $json['message']);
+        $this->assertCount(2, $json);
+
+        // Test some invalid data
+        $post = ['grey' => 1];
+        $response = $this->actingAs($john)->post("/api/v4/users/{$john->id}/config", $post);
+        $response->assertStatus(422);
+
+        $json = $response->json();
+
+        $this->assertSame('error', $json['status']);
+        $this->assertCount(2, $json);
+        $this->assertCount(1, $json['errors']);
+        $this->assertSame('The requested configuration parameter is not supported.', $json['errors']['grey']);
+
+        $this->assertNull($john->fresh()->getSetting('greylisting'));
+
+        // Test some valid data
+        $post = ['greylisting' => 1];
+        $response = $this->actingAs($john)->post("/api/v4/users/{$john->id}/config", $post);
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertCount(2, $json);
+        $this->assertSame('success', $json['status']);
+        $this->assertSame('User settings updated successfully.', $json['message']);
+
+        $this->assertSame('true', $john->fresh()->getSetting('greylisting'));
+
+        // Test some valid data
+        $post = ['greylisting' => 0];
+        $response = $this->actingAs($john)->post("/api/v4/users/{$john->id}/config", $post);
+        $response->assertStatus(200);
+
+        $json = $response->json();
+
+        $this->assertCount(2, $json);
+        $this->assertSame('success', $json['status']);
+        $this->assertSame('User settings updated successfully.', $json['message']);
+
+        $this->assertSame('false', $john->fresh()->getSetting('greylisting'));
+    }
+
     /**
      * Test user creation (POST /api/v4/users)
      */
     public function testStore(): void
     {
         Queue::fake();
 
         $jack = $this->getTestUser('jack@kolab.org');
         $john = $this->getTestUser('john@kolab.org');
         $deleted_priv = $this->getTestUser('deleted@kolab.org');
         $deleted_priv->delete();
 
         // Test empty request
         $response = $this->actingAs($john)->post("/api/v4/users", []);
         $response->assertStatus(422);
 
         $json = $response->json();
 
         $this->assertSame('error', $json['status']);
         $this->assertSame("The email field is required.", $json['errors']['email']);
         $this->assertSame("The password field is required.", $json['errors']['password'][0]);
         $this->assertCount(2, $json);
 
         // Test access by user not being a wallet controller
         $post = ['first_name' => 'Test'];
         $response = $this->actingAs($jack)->post("/api/v4/users", $post);
         $json = $response->json();
 
         $response->assertStatus(403);
 
         $this->assertSame('error', $json['status']);
         $this->assertSame("Access denied", $json['message']);
         $this->assertCount(2, $json);
 
         // Test some invalid data
         $post = ['password' => '12345678', 'email' => 'invalid'];
         $response = $this->actingAs($john)->post("/api/v4/users", $post);
         $response->assertStatus(422);
 
         $json = $response->json();
 
         $this->assertSame('error', $json['status']);
         $this->assertCount(2, $json);
         $this->assertSame('The password confirmation does not match.', $json['errors']['password'][0]);
         $this->assertSame('The specified email is invalid.', $json['errors']['email']);
 
         // Test existing user email
         $post = [
             'password' => 'simple',
             'password_confirmation' => 'simple',
             'first_name' => 'John2',
             'last_name' => 'Doe2',
             'email' => 'jack.daniels@kolab.org',
         ];
 
         $response = $this->actingAs($john)->post("/api/v4/users", $post);
         $response->assertStatus(422);
 
         $json = $response->json();
 
         $this->assertSame('error', $json['status']);
         $this->assertCount(2, $json);
         $this->assertSame('The specified email is not available.', $json['errors']['email']);
 
         $package_kolab = \App\Package::where('title', 'kolab')->first();
         $package_domain = \App\Package::where('title', 'domain-hosting')->first();
 
         $post = [
             'password' => 'simple',
             'password_confirmation' => 'simple',
             'first_name' => 'John2',
             'last_name' => 'Doe2',
             'email' => 'john2.doe2@kolab.org',
             'organization' => 'TestOrg',
             'aliases' => ['useralias1@kolab.org', 'deleted@kolab.org'],
         ];
 
         // Missing package
         $response = $this->actingAs($john)->post("/api/v4/users", $post);
         $json = $response->json();
 
         $response->assertStatus(422);
 
         $this->assertSame('error', $json['status']);
         $this->assertSame("Package is required.", $json['errors']['package']);
         $this->assertCount(2, $json);
 
         // Invalid package
         $post['package'] = $package_domain->id;
         $response = $this->actingAs($john)->post("/api/v4/users", $post);
         $json = $response->json();
 
         $response->assertStatus(422);
 
         $this->assertSame('error', $json['status']);
         $this->assertSame("Invalid package selected.", $json['errors']['package']);
         $this->assertCount(2, $json);
 
         // Test full and valid data
         $post['package'] = $package_kolab->id;
         $response = $this->actingAs($john)->post("/api/v4/users", $post);
         $json = $response->json();
 
         $response->assertStatus(200);
 
         $this->assertSame('success', $json['status']);
         $this->assertSame("User created successfully.", $json['message']);
         $this->assertCount(2, $json);
 
         $user = User::where('email', 'john2.doe2@kolab.org')->first();
         $this->assertInstanceOf(User::class, $user);
         $this->assertSame('John2', $user->getSetting('first_name'));
         $this->assertSame('Doe2', $user->getSetting('last_name'));
         $this->assertSame('TestOrg', $user->getSetting('organization'));
         $aliases = $user->aliases()->orderBy('alias')->get();
         $this->assertCount(2, $aliases);
         $this->assertSame('deleted@kolab.org', $aliases[0]->alias);
         $this->assertSame('useralias1@kolab.org', $aliases[1]->alias);
         // Assert the new user entitlements
         $this->assertUserEntitlements($user, ['groupware', 'mailbox', 'storage', 'storage']);
         // Assert the wallet to which the new user should be assigned to
         $wallet = $user->wallet();
         $this->assertSame($john->wallets()->first()->id, $wallet->id);
 
         // Attempt to create a user previously deleted
         $user->delete();
 
         $post['package'] = $package_kolab->id;
         $post['aliases'] = [];
         $response = $this->actingAs($john)->post("/api/v4/users", $post);
         $json = $response->json();
 
         $response->assertStatus(200);
 
         $this->assertSame('success', $json['status']);
         $this->assertSame("User created successfully.", $json['message']);
         $this->assertCount(2, $json);
 
         $user = User::where('email', 'john2.doe2@kolab.org')->first();
         $this->assertInstanceOf(User::class, $user);
         $this->assertSame('John2', $user->getSetting('first_name'));
         $this->assertSame('Doe2', $user->getSetting('last_name'));
         $this->assertSame('TestOrg', $user->getSetting('organization'));
         $this->assertCount(0, $user->aliases()->get());
         $this->assertUserEntitlements($user, ['groupware', 'mailbox', 'storage', 'storage']);
 
         // Test acting as account controller (not owner)
 
         $this->markTestIncomplete();
     }
 
     /**
      * Test user update (PUT /api/v4/users/<user-id>)
      */
     public function testUpdate(): void
     {
         $userA = $this->getTestUser('UsersControllerTest1@userscontroller.com');
         $jack = $this->getTestUser('jack@kolab.org');
         $john = $this->getTestUser('john@kolab.org');
         $ned = $this->getTestUser('ned@kolab.org');
         $domain = $this->getTestDomain(
             'userscontroller.com',
             ['status' => Domain::STATUS_NEW, 'type' => Domain::TYPE_EXTERNAL]
         );
 
         // Test unauthorized update of other user profile
         $response = $this->actingAs($jack)->get("/api/v4/users/{$userA->id}", []);
         $response->assertStatus(403);
 
         // Test authorized update of account owner by account controller
         $response = $this->actingAs($ned)->get("/api/v4/users/{$john->id}", []);
         $response->assertStatus(200);
 
         // Test updating of self (empty request)
         $response = $this->actingAs($userA)->put("/api/v4/users/{$userA->id}", []);
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertSame('success', $json['status']);
         $this->assertSame("User data updated successfully.", $json['message']);
         $this->assertTrue(!empty($json['statusInfo']));
         $this->assertCount(3, $json);
 
         // Test some invalid data
         $post = ['password' => '12345678', 'currency' => 'invalid'];
         $response = $this->actingAs($userA)->put("/api/v4/users/{$userA->id}", $post);
         $response->assertStatus(422);
 
         $json = $response->json();
 
         $this->assertSame('error', $json['status']);
         $this->assertCount(2, $json);
         $this->assertSame('The password confirmation does not match.', $json['errors']['password'][0]);
         $this->assertSame('The currency must be 3 characters.', $json['errors']['currency'][0]);
 
         // Test full profile update including password
         $post = [
             'password' => 'simple',
             'password_confirmation' => 'simple',
             'first_name' => 'John2',
             'last_name' => 'Doe2',
             'organization' => 'TestOrg',
             'phone' => '+123 123 123',
             'external_email' => 'external@gmail.com',
             'billing_address' => 'billing',
             'country' => 'CH',
             'currency' => 'CHF',
             'aliases' => ['useralias1@' . \config('app.domain'), 'useralias2@' . \config('app.domain')]
         ];
 
         $response = $this->actingAs($userA)->put("/api/v4/users/{$userA->id}", $post);
         $json = $response->json();
 
         $response->assertStatus(200);
 
         $this->assertSame('success', $json['status']);
         $this->assertSame("User data updated successfully.", $json['message']);
         $this->assertTrue(!empty($json['statusInfo']));
         $this->assertCount(3, $json);
         $this->assertTrue($userA->password != $userA->fresh()->password);
         unset($post['password'], $post['password_confirmation'], $post['aliases']);
         foreach ($post as $key => $value) {
             $this->assertSame($value, $userA->getSetting($key));
         }
         $aliases = $userA->aliases()->orderBy('alias')->get();
         $this->assertCount(2, $aliases);
         $this->assertSame('useralias1@' . \config('app.domain'), $aliases[0]->alias);
         $this->assertSame('useralias2@' . \config('app.domain'), $aliases[1]->alias);
 
         // Test unsetting values
         $post = [
             'first_name' => '',
             'last_name' => '',
             'organization' => '',
             'phone' => '',
             'external_email' => '',
             'billing_address' => '',
             'country' => '',
             'currency' => '',
             'aliases' => ['useralias2@' . \config('app.domain')]
         ];
 
         $response = $this->actingAs($userA)->put("/api/v4/users/{$userA->id}", $post);
         $json = $response->json();
 
         $response->assertStatus(200);
 
         $this->assertSame('success', $json['status']);
         $this->assertSame("User data updated successfully.", $json['message']);
         $this->assertTrue(!empty($json['statusInfo']));
         $this->assertCount(3, $json);
         unset($post['aliases']);
         foreach ($post as $key => $value) {
             $this->assertNull($userA->getSetting($key));
         }
         $aliases = $userA->aliases()->get();
         $this->assertCount(1, $aliases);
         $this->assertSame('useralias2@' . \config('app.domain'), $aliases[0]->alias);
 
         // Test error on some invalid aliases missing password confirmation
         $post = [
             'password' => 'simple123',
             'aliases' => [
                 'useralias2@' . \config('app.domain'),
                 'useralias1@kolab.org',
                 '@kolab.org',
             ]
         ];
 
         $response = $this->actingAs($userA)->put("/api/v4/users/{$userA->id}", $post);
         $json = $response->json();
 
         $response->assertStatus(422);
 
         $this->assertSame('error', $json['status']);
         $this->assertCount(2, $json['errors']);
         $this->assertCount(2, $json['errors']['aliases']);
         $this->assertSame("The specified domain is not available.", $json['errors']['aliases'][1]);
         $this->assertSame("The specified alias is invalid.", $json['errors']['aliases'][2]);
         $this->assertSame("The password confirmation does not match.", $json['errors']['password'][0]);
 
         // Test authorized update of other user
         $response = $this->actingAs($ned)->put("/api/v4/users/{$jack->id}", []);
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $this->assertTrue(empty($json['statusInfo']));
 
         // TODO: Test error on aliases with invalid/non-existing/other-user's domain
 
         // Create entitlements and additional user for following tests
         $owner = $this->getTestUser('UsersControllerTest1@userscontroller.com');
         $user = $this->getTestUser('UsersControllerTest2@userscontroller.com');
         $package_domain = Package::where('title', 'domain-hosting')->first();
         $package_kolab = Package::where('title', 'kolab')->first();
         $package_lite = Package::where('title', 'lite')->first();
         $sku_mailbox = Sku::where('title', 'mailbox')->first();
         $sku_storage = Sku::where('title', 'storage')->first();
         $sku_groupware = Sku::where('title', 'groupware')->first();
 
         $domain = $this->getTestDomain(
             'userscontroller.com',
             [
                 'status' => Domain::STATUS_NEW,
                 'type' => Domain::TYPE_EXTERNAL,
             ]
         );
 
         $domain->assignPackage($package_domain, $owner);
         $owner->assignPackage($package_kolab);
         $owner->assignPackage($package_lite, $user);
 
         // Non-controller cannot update his own entitlements
         $post = ['skus' => []];
         $response = $this->actingAs($user)->put("/api/v4/users/{$user->id}", $post);
         $response->assertStatus(422);
 
         // Test updating entitlements
         $post = [
             'skus' => [
                 $sku_mailbox->id => 1,
                 $sku_storage->id => 3,
                 $sku_groupware->id => 1,
             ],
         ];
 
         $response = $this->actingAs($owner)->put("/api/v4/users/{$user->id}", $post);
         $response->assertStatus(200);
 
         $json = $response->json();
 
         $storage_cost = $user->entitlements()
             ->where('sku_id', $sku_storage->id)
             ->orderBy('cost')
             ->pluck('cost')->all();
 
         $this->assertUserEntitlements(
             $user,
             ['groupware', 'mailbox', 'storage', 'storage', 'storage']
         );
 
         $this->assertSame([0, 0, 25], $storage_cost);
         $this->assertTrue(empty($json['statusInfo']));
     }
 
     /**
      * Test UsersController::updateEntitlements()
      */
     public function testUpdateEntitlements(): void
     {
         $jane = $this->getTestUser('jane@kolabnow.com');
 
         $kolab = \App\Package::where('title', 'kolab')->first();
         $storage = \App\Sku::where('title', 'storage')->first();
         $activesync = \App\Sku::where('title', 'activesync')->first();
         $groupware = \App\Sku::where('title', 'groupware')->first();
         $mailbox = \App\Sku::where('title', 'mailbox')->first();
 
         // standard package, 1 mailbox, 1 groupware, 2 storage
         $jane->assignPackage($kolab);
 
         // add 2 storage, 1 activesync
         $post = [
             'skus' => [
                 $mailbox->id => 1,
                 $groupware->id => 1,
                 $storage->id => 4,
                 $activesync->id => 1
             ]
         ];
 
         $response = $this->actingAs($jane)->put("/api/v4/users/{$jane->id}", $post);
         $response->assertStatus(200);
 
         $this->assertUserEntitlements(
             $jane,
             [
                 'activesync',
                 'groupware',
                 'mailbox',
                 'storage',
                 'storage',
                 'storage',
                 'storage'
             ]
         );
 
         // add 2 storage, remove 1 activesync
         $post = [
             'skus' => [
                 $mailbox->id => 1,
                 $groupware->id => 1,
                 $storage->id => 6,
                 $activesync->id => 0
             ]
         ];
 
         $response = $this->actingAs($jane)->put("/api/v4/users/{$jane->id}", $post);
         $response->assertStatus(200);
 
         $this->assertUserEntitlements(
             $jane,
             [
                 'groupware',
                 'mailbox',
                 'storage',
                 'storage',
                 'storage',
                 'storage',
                 'storage',
                 'storage'
             ]
         );
 
         // add mailbox
         $post = [
             'skus' => [
                 $mailbox->id => 2,
                 $groupware->id => 1,
                 $storage->id => 6,
                 $activesync->id => 0
             ]
         ];
 
         $response = $this->actingAs($jane)->put("/api/v4/users/{$jane->id}", $post);
         $response->assertStatus(500);
 
         $this->assertUserEntitlements(
             $jane,
             [
                 'groupware',
                 'mailbox',
                 'storage',
                 'storage',
                 'storage',
                 'storage',
                 'storage',
                 'storage'
             ]
         );
 
         // remove mailbox
         $post = [
             'skus' => [
                 $mailbox->id => 0,
                 $groupware->id => 1,
                 $storage->id => 6,
                 $activesync->id => 0
             ]
         ];
 
         $response = $this->actingAs($jane)->put("/api/v4/users/{$jane->id}", $post);
         $response->assertStatus(500);
 
         $this->assertUserEntitlements(
             $jane,
             [
                 'groupware',
                 'mailbox',
                 'storage',
                 'storage',
                 'storage',
                 'storage',
                 'storage',
                 'storage'
             ]
         );
 
         // less than free storage
         $post = [
             'skus' => [
                 $mailbox->id => 1,
                 $groupware->id => 1,
                 $storage->id => 1,
                 $activesync->id => 0
             ]
         ];
 
         $response = $this->actingAs($jane)->put("/api/v4/users/{$jane->id}", $post);
         $response->assertStatus(200);
 
         $this->assertUserEntitlements(
             $jane,
             [
                 'groupware',
                 'mailbox',
                 'storage',
                 'storage'
             ]
         );
     }
 
     /**
      * Test user data response used in show and info actions
      */
     public function testUserResponse(): void
     {
         $provider = \config('services.payment_provider') ?: 'mollie';
         $user = $this->getTestUser('john@kolab.org');
         $wallet = $user->wallets()->first();
         $wallet->setSettings(['mollie_id' => null, 'stripe_id' => null]);
         $result = $this->invokeMethod(new UsersController(), 'userResponse', [$user]);
 
         $this->assertEquals($user->id, $result['id']);
         $this->assertEquals($user->email, $result['email']);
         $this->assertEquals($user->status, $result['status']);
         $this->assertTrue(is_array($result['statusInfo']));
 
         $this->assertTrue(is_array($result['aliases']));
         $this->assertCount(1, $result['aliases']);
         $this->assertSame('john.doe@kolab.org', $result['aliases'][0]);
 
         $this->assertTrue(is_array($result['settings']));
         $this->assertSame('US', $result['settings']['country']);
         $this->assertSame('USD', $result['settings']['currency']);
 
         $this->assertTrue(is_array($result['accounts']));
         $this->assertTrue(is_array($result['wallets']));
         $this->assertCount(0, $result['accounts']);
         $this->assertCount(1, $result['wallets']);
         $this->assertSame($wallet->id, $result['wallet']['id']);
         $this->assertArrayNotHasKey('discount', $result['wallet']);
 
         $this->assertTrue($result['statusInfo']['enableDomains']);
         $this->assertTrue($result['statusInfo']['enableWallets']);
         $this->assertTrue($result['statusInfo']['enableUsers']);
 
         // Ned is John's wallet controller
         $ned = $this->getTestUser('ned@kolab.org');
         $ned_wallet = $ned->wallets()->first();
         $result = $this->invokeMethod(new UsersController(), 'userResponse', [$ned]);
 
         $this->assertEquals($ned->id, $result['id']);
         $this->assertEquals($ned->email, $result['email']);
         $this->assertTrue(is_array($result['accounts']));
         $this->assertTrue(is_array($result['wallets']));
         $this->assertCount(1, $result['accounts']);
         $this->assertCount(1, $result['wallets']);
         $this->assertSame($wallet->id, $result['wallet']['id']);
         $this->assertSame($wallet->id, $result['accounts'][0]['id']);
         $this->assertSame($ned_wallet->id, $result['wallets'][0]['id']);
         $this->assertSame($provider, $result['wallet']['provider']);
         $this->assertSame($provider, $result['wallets'][0]['provider']);
 
         $this->assertTrue($result['statusInfo']['enableDomains']);
         $this->assertTrue($result['statusInfo']['enableWallets']);
         $this->assertTrue($result['statusInfo']['enableUsers']);
 
         // Test discount in a response
         $discount = Discount::where('code', 'TEST')->first();
         $wallet->discount()->associate($discount);
         $wallet->save();
         $mod_provider = $provider == 'mollie' ? 'stripe' : 'mollie';
         $wallet->setSetting($mod_provider . '_id', 123);
         $user->refresh();
 
         $result = $this->invokeMethod(new UsersController(), 'userResponse', [$user]);
 
         $this->assertEquals($user->id, $result['id']);
         $this->assertSame($discount->id, $result['wallet']['discount_id']);
         $this->assertSame($discount->discount, $result['wallet']['discount']);
         $this->assertSame($discount->description, $result['wallet']['discount_description']);
         $this->assertSame($mod_provider, $result['wallet']['provider']);
         $this->assertSame($discount->id, $result['wallets'][0]['discount_id']);
         $this->assertSame($discount->discount, $result['wallets'][0]['discount']);
         $this->assertSame($discount->description, $result['wallets'][0]['discount_description']);
         $this->assertSame($mod_provider, $result['wallets'][0]['provider']);
 
         // Jack is not a John's wallet controller
         $jack = $this->getTestUser('jack@kolab.org');
         $result = $this->invokeMethod(new UsersController(), 'userResponse', [$jack]);
 
         $this->assertFalse($result['statusInfo']['enableDomains']);
         $this->assertFalse($result['statusInfo']['enableWallets']);
         $this->assertFalse($result['statusInfo']['enableUsers']);
     }
 
     /**
      * List of email address validation cases for testValidateEmail()
      *
      * @return array Arguments for testValidateEmail()
      */
     public function dataValidateEmail(): array
     {
         $this->refreshApplication();
         $public_domains = Domain::getPublicDomains();
         $domain = reset($public_domains);
 
         $john = $this->getTestUser('john@kolab.org');
         $jack = $this->getTestUser('jack@kolab.org');
         $user = $this->getTestUser('UsersControllerTest1@userscontroller.com');
 
         return [
             // Invalid format
             ["$domain", $john, 'The specified email is invalid.'],
             [".@$domain", $john, 'The specified email is invalid.'],
             ["test123456@localhost", $john, 'The specified domain is invalid.'],
             ["test123456@unknown-domain.org", $john, 'The specified domain is invalid.'],
 
             ["$domain", $john, 'The specified email is invalid.'],
             [".@$domain", $john, 'The specified email is invalid.'],
 
             // forbidden local part on public domains
             ["admin@$domain", $john, 'The specified email is not available.'],
             ["administrator@$domain", $john, 'The specified email is not available.'],
 
             // forbidden (other user's domain)
             ["testtest@kolab.org", $user, 'The specified domain is not available.'],
 
             // existing alias of other user, to be a user email
             ["jack.daniels@kolab.org", $john, 'The specified email is not available.'],
 
             // valid (user domain)
             ["admin@kolab.org", $john, null],
 
             // valid (public domain)
             ["test.test@$domain", $john, null],
         ];
     }
 
     /**
      * User email address validation.
      *
      * Note: Technically these include unit tests, but let's keep it here for now.
      * FIXME: Shall we do a http request for each case?
      *
      * @dataProvider dataValidateEmail
      */
     public function testValidateEmail($email, $user, $expected_result): void
     {
         $result = UsersController::validateEmail($email, $user);
         $this->assertSame($expected_result, $result);
     }
 
     /**
      * User email validation - tests for $deleted argument
      *
      * Note: Technically these include unit tests, but let's keep it here for now.
      * FIXME: Shall we do a http request for each case?
      */
     public function testValidateEmailDeleted(): void
     {
         Queue::fake();
 
         $john = $this->getTestUser('john@kolab.org');
         $deleted_priv = $this->getTestUser('deleted@kolab.org');
         $deleted_priv->delete();
         $deleted_pub = $this->getTestUser('deleted@kolabnow.com');
         $deleted_pub->delete();
 
         $result = UsersController::validateEmail('deleted@kolab.org', $john, $deleted);
         $this->assertSame(null, $result);
         $this->assertSame($deleted_priv->id, $deleted->id);
 
         $result = UsersController::validateEmail('deleted@kolabnow.com', $john, $deleted);
         $this->assertSame('The specified email is not available.', $result);
         $this->assertSame(null, $deleted);
 
         $result = UsersController::validateEmail('jack@kolab.org', $john, $deleted);
         $this->assertSame('The specified email is not available.', $result);
         $this->assertSame(null, $deleted);
     }
 
     /**
      * User email validation - tests for an address being a group email address
      *
      * Note: Technically these include unit tests, but let's keep it here for now.
      * FIXME: Shall we do a http request for each case?
      */
     public function testValidateEmailGroup(): void
     {
         Queue::fake();
 
         $john = $this->getTestUser('john@kolab.org');
         $pub_group = $this->getTestGroup('group-test@kolabnow.com');
         $priv_group = $this->getTestGroup('group-test@kolab.org');
 
         // A group in a public domain, existing
         $result = UsersController::validateEmail($pub_group->email, $john, $deleted);
         $this->assertSame('The specified email is not available.', $result);
         $this->assertNull($deleted);
 
         $pub_group->delete();
 
         // A group in a public domain, deleted
         $result = UsersController::validateEmail($pub_group->email, $john, $deleted);
         $this->assertSame('The specified email is not available.', $result);
         $this->assertNull($deleted);
 
         // A group in a private domain, existing
         $result = UsersController::validateEmail($priv_group->email, $john, $deleted);
         $this->assertSame('The specified email is not available.', $result);
         $this->assertNull($deleted);
 
         $priv_group->delete();
 
         // A group in a private domain, deleted
         $result = UsersController::validateEmail($priv_group->email, $john, $deleted);
         $this->assertSame(null, $result);
         $this->assertSame($priv_group->id, $deleted->id);
     }
 
     /**
      * List of alias validation cases for testValidateAlias()
      *
      * @return array Arguments for testValidateAlias()
      */
     public function dataValidateAlias(): array
     {
         $this->refreshApplication();
         $public_domains = Domain::getPublicDomains();
         $domain = reset($public_domains);
 
         $john = $this->getTestUser('john@kolab.org');
         $user = $this->getTestUser('UsersControllerTest1@userscontroller.com');
 
         return [
             // Invalid format
             ["$domain", $john, 'The specified alias is invalid.'],
             [".@$domain", $john, 'The specified alias is invalid.'],
             ["test123456@localhost", $john, 'The specified domain is invalid.'],
             ["test123456@unknown-domain.org", $john, 'The specified domain is invalid.'],
 
             ["$domain", $john, 'The specified alias is invalid.'],
             [".@$domain", $john, 'The specified alias is invalid.'],
 
             // forbidden local part on public domains
             ["admin@$domain", $john, 'The specified alias is not available.'],
             ["administrator@$domain", $john, 'The specified alias is not available.'],
 
             // forbidden (other user's domain)
             ["testtest@kolab.org", $user, 'The specified domain is not available.'],
 
             // existing alias of other user, to be an alias, user in the same group account
             ["jack.daniels@kolab.org", $john, null],
 
             // existing user
             ["jack@kolab.org", $john, 'The specified alias is not available.'],
 
             // valid (user domain)
             ["admin@kolab.org", $john, null],
 
             // valid (public domain)
             ["test.test@$domain", $john, null],
         ];
     }
 
     /**
      * User email alias validation.
      *
      * Note: Technically these include unit tests, but let's keep it here for now.
      * FIXME: Shall we do a http request for each case?
      *
      * @dataProvider dataValidateAlias
      */
     public function testValidateAlias($alias, $user, $expected_result): void
     {
         $result = UsersController::validateAlias($alias, $user);
         $this->assertSame($expected_result, $result);
     }
 
     /**
      * User alias validation - more cases.
      *
      * Note: Technically these include unit tests, but let's keep it here for now.
      * FIXME: Shall we do a http request for each case?
      */
     public function testValidateAlias2(): void
     {
         Queue::fake();
 
         $john = $this->getTestUser('john@kolab.org');
         $jack = $this->getTestUser('jack@kolab.org');
         $user = $this->getTestUser('UsersControllerTest1@userscontroller.com');
         $deleted_priv = $this->getTestUser('deleted@kolab.org');
         $deleted_priv->setAliases(['deleted-alias@kolab.org']);
         $deleted_priv->delete();
         $deleted_pub = $this->getTestUser('deleted@kolabnow.com');
         $deleted_pub->setAliases(['deleted-alias@kolabnow.com']);
         $deleted_pub->delete();
         $group = $this->getTestGroup('group-test@kolabnow.com');
 
         // An alias that was a user email before is allowed, but only for custom domains
         $result = UsersController::validateAlias('deleted@kolab.org', $john);
         $this->assertSame(null, $result);
 
         $result = UsersController::validateAlias('deleted-alias@kolab.org', $john);
         $this->assertSame(null, $result);
 
         $result = UsersController::validateAlias('deleted@kolabnow.com', $john);
         $this->assertSame('The specified alias is not available.', $result);
 
         $result = UsersController::validateAlias('deleted-alias@kolabnow.com', $john);
         $this->assertSame('The specified alias is not available.', $result);
 
         // A grpoup with the same email address exists
         $result = UsersController::validateAlias($group->email, $john);
         $this->assertSame('The specified alias is not available.', $result);
     }
 }