diff --git a/bin/phpunit b/bin/phpunit
--- a/bin/phpunit
+++ b/bin/phpunit
@@ -6,6 +6,7 @@
 
 php -dzend_extension=xdebug.so \
     vendor/bin/phpunit \
+    --no-coverage \
     --stop-on-defect \
     --stop-on-error \
     --stop-on-failure $*
diff --git a/src/app/Console/Commands/Job/WalletCheck.php b/src/app/Console/Commands/Job/WalletCheck.php
new file mode 100644
--- /dev/null
+++ b/src/app/Console/Commands/Job/WalletCheck.php
@@ -0,0 +1,40 @@
+<?php
+
+namespace App\Console\Commands\Job;
+
+use App\Wallet;
+use Illuminate\Console\Command;
+
+class WalletCheck extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'job:walletcheck {wallet}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = "Execute the WalletCheck job (again).";
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $wallet = Wallet::find($this->argument('wallet'));
+
+        if (!$wallet) {
+            return 1;
+        }
+
+        $job = new \App\Jobs\WalletCheck($wallet);
+        $job->handle();
+    }
+}
diff --git a/src/app/Console/Commands/WalletCharge.php b/src/app/Console/Commands/WalletCharge.php
--- a/src/app/Console/Commands/WalletCharge.php
+++ b/src/app/Console/Commands/WalletCharge.php
@@ -37,7 +37,10 @@
      */
     public function handle()
     {
-        $wallets = \App\Wallet::all();
+        // Get all wallets, excluding deleted accounts
+        $wallets = \App\Wallet::join('users', 'users.id', '=', 'wallets.user_id')
+            ->whereNull('users.deleted_at')
+            ->get();
 
         foreach ($wallets as $wallet) {
             $charge = $wallet->chargeEntitlements();
@@ -50,6 +53,11 @@
                 // Top-up the wallet if auto-payment enabled for the wallet
                 \App\Jobs\WalletCharge::dispatch($wallet);
             }
+
+            if ($wallet->balance < 0) {
+                // Check the account balance, send notifications, suspend, delete
+                \App\Jobs\WalletCheck::dispatch($wallet);
+            }
         }
     }
 }
diff --git a/src/app/Jobs/UserVerify.php b/src/app/Jobs/UserVerify.php
--- a/src/app/Jobs/UserVerify.php
+++ b/src/app/Jobs/UserVerify.php
@@ -44,22 +44,7 @@
      */
     public function handle()
     {
-        // Verify a mailbox sku is among the user entitlements.
-        $skuMailbox = \App\Sku::where('title', 'mailbox')->first();
-
-        if (!$skuMailbox) {
-            return;
-        }
-
-        $mailbox = \App\Entitlement::where(
-            [
-                'sku_id' => $skuMailbox->id,
-                'entitleable_id' => $this->user->id,
-                'entitleable_type' => User::class
-            ]
-        )->first();
-
-        if (!$mailbox) {
+        if (!$this->user->hasSku('mailbox')) {
             return;
         }
 
diff --git a/src/app/Jobs/WalletCheck.php b/src/app/Jobs/WalletCheck.php
new file mode 100644
--- /dev/null
+++ b/src/app/Jobs/WalletCheck.php
@@ -0,0 +1,277 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Wallet;
+use Carbon\Carbon;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\Mail;
+
+class WalletCheck implements ShouldQueue
+{
+    use Dispatchable;
+    use InteractsWithQueue;
+    use Queueable;
+    use SerializesModels;
+
+    public const THRESHOLD_DELETE = 'delete';
+    public const THRESHOLD_BEFORE_DELETE = 'before_delete';
+    public const THRESHOLD_SUSPEND = 'suspend';
+    public const THRESHOLD_REMINDER = 'reminder';
+    public const THRESHOLD_INITIAL = 'initial';
+
+    /** @var int The number of seconds to wait before retrying the job. */
+    public $retryAfter = 10;
+
+    /** @var int How many times retry the job if it fails. */
+    public $tries = 5;
+
+    /** @var bool Delete the job if the wallet no longer exist. */
+    public $deleteWhenMissingModels = true;
+
+    /** @var \App\Wallet A wallet object */
+    protected $wallet;
+
+
+    /**
+     * Create a new job instance.
+     *
+     * @param \App\Wallet $wallet The wallet that has been charged.
+     *
+     * @return void
+     */
+    public function __construct(Wallet $wallet)
+    {
+        $this->wallet = $wallet;
+    }
+
+    /**
+     * Execute the job.
+     *
+     * @return void
+     */
+    public function handle()
+    {
+        if ($this->wallet->balance >= 0) {
+            return;
+        }
+
+        $now = Carbon::now();
+
+        // Delete the account
+        if (self::threshold($this->wallet, self::THRESHOLD_DELETE) < $now) {
+            $this->deleteAccount();
+            return;
+        }
+
+        // Warn about the upcomming account deletion
+        if (self::threshold($this->wallet, self::THRESHOLD_BEFORE_DELETE) < $now) {
+            $this->warnBeforeDelete();
+            return;
+        }
+
+        // Suspend the account
+        if (self::threshold($this->wallet, self::THRESHOLD_SUSPEND) < $now) {
+            $this->suspendAccount();
+            return;
+        }
+
+        // Send the second reminder
+        if (self::threshold($this->wallet, self::THRESHOLD_REMINDER) < $now) {
+            $this->secondReminder();
+            return;
+        }
+
+        // Send the initial reminder
+        if (self::threshold($this->wallet, self::THRESHOLD_INITIAL) < $now) {
+            $this->initialReminder();
+            return;
+        }
+    }
+
+    /**
+     * Send the initial reminder
+     */
+    protected function initialReminder()
+    {
+        if ($this->wallet->getSetting('balance_warning_initial')) {
+            return;
+        }
+
+        // TODO: Should we check if the account is already suspended?
+
+        $this->sendMail(\App\Mail\NegativeBalance::class);
+
+        $now = \Carbon\Carbon::now()->toDateTimeString();
+        $this->wallet->setSetting('balance_warning_initial', $now);
+
+        \Log::info("[WalletCheck] Notification sent for {$this->wallet->owner->email}");
+    }
+
+    /**
+     * Send the second reminder
+     */
+    protected function secondReminder()
+    {
+        if ($this->wallet->getSetting('balance_warning_reminder')) {
+            return;
+        }
+
+        // TODO: Should we check if the account is already suspended?
+
+        $this->sendMail(\App\Mail\NegativeBalanceReminder::class);
+
+        $now = \Carbon\Carbon::now()->toDateTimeString();
+        $this->wallet->setSetting('balance_warning_reminder', $now);
+
+        \Log::info("[WalletCheck] Reminder sent for {$this->wallet->owner->email}");
+    }
+
+    /**
+     * Suspend the account (and send the warning)
+     */
+    protected function suspendAccount()
+    {
+        if ($this->wallet->getSetting('balance_warning_suspended')) {
+            return;
+        }
+
+        // Sanity check, already deleted
+        if (!$this->wallet->owner) {
+            return;
+        }
+
+        \Log::info("[WalletCheck] Suspend account {$this->wallet->owner->email}");
+
+        // Suspend the account
+        $this->wallet->owner->suspend();
+        foreach ($this->wallet->entitlements as $entitlement) {
+            if (
+                $entitlement->entitleable_type == \App\Domain::class
+                || $entitlement->entitleable_type == \App\User::class
+            ) {
+                $entitlement->entitleable->suspend();
+            }
+        }
+
+        $this->sendMail(\App\Mail\NegativeBalanceSuspended::class);
+
+        $now = \Carbon\Carbon::now()->toDateTimeString();
+        $this->wallet->setSetting('balance_warning_suspended', $now);
+    }
+
+    /**
+     * Send the last warning before delete
+     */
+    protected function warnBeforeDelete()
+    {
+        if ($this->wallet->getSetting('balance_warning_before_delete')) {
+            return;
+        }
+
+        // Sanity check, already deleted
+        if (!$this->wallet->owner) {
+            return;
+        }
+
+        $this->sendMail(\App\Mail\NegativeBalanceBeforeDelete::class, true);
+
+        $now = \Carbon\Carbon::now()->toDateTimeString();
+        $this->wallet->setSetting('balance_warning_before_delete', $now);
+
+        \Log::info("[WalletCheck] Last warning sent for {$this->wallet->owner->email}");
+    }
+
+    /**
+     * Delete the account
+     */
+    protected function deleteAccount()
+    {
+        // TODO: This will not work when we actually allow multiple-wallets per account
+        //       but in this case we anyway have to change the whole thing
+        //       and calculate summarized balance from all wallets.
+        // The dirty work will be done by UserObserver
+        if ($this->wallet->owner) {
+            \Log::info("[WalletCheck] Delete account {$this->wallet->owner->email}");
+            $this->wallet->owner->delete();
+        }
+    }
+
+    /**
+     * Send the email
+     *
+     * @param string $class         Mailable class name
+     * @param bool   $with_external Use users's external email
+     */
+    protected function sendMail($class, $with_external = false): void
+    {
+        // TODO: Send the email to all wallet controllers?
+
+        $mail = new $class($this->wallet, $this->wallet->owner);
+
+        list($to, $cc) = \App\Mail\Helper::userEmails($this->wallet->owner, $with_external);
+
+        if (!empty($to) || !empty($cc)) {
+            Mail::to($to)->cc($cc)->send($mail);
+        }
+    }
+
+    /**
+     * Get the date-time for an action threshold. Calculated using
+     * the date when a wallet balance turned negative.
+     *
+     * @param \App\Wallet $wallet A wallet
+     * @param string      $type   Action type (one of self::THRESHOLD_*)
+     *
+     * @return \Carbon\Carbon The threshold date-time object
+     */
+    public static function threshold(Wallet $wallet, string $type): ?Carbon
+    {
+        $negative_since = $wallet->getSetting('balance_negative_since');
+
+        // Migration scenario: balance<0, but no balance_negative_since set
+        if (!$negative_since) {
+            $negative_since = Carbon::now();
+            $wallet->setSetting('balance_negative_since', $negative_since->toDateTimeString());
+        } else {
+            $negative_since = new Carbon($negative_since);
+        }
+
+        $remind = 7;   // remind after first X days
+        $suspend = 14; // suspend after next X days
+        $delete = 21;  // delete after next X days
+        $warn = 3;     // warn about delete on X days before delete
+
+        // Acount deletion
+        if ($type == self::THRESHOLD_DELETE) {
+            return $negative_since->addDays($delete + $suspend + $remind);
+        }
+
+        // Warning about the upcomming account deletion
+        if ($type == self::THRESHOLD_BEFORE_DELETE) {
+            return $negative_since->addDays($delete + $suspend + $remind - $warn);
+        }
+
+        // Account suspension
+        if ($type == self::THRESHOLD_SUSPEND) {
+            return $negative_since->addDays($suspend + $remind);
+        }
+
+        // Second notification
+        if ($type == self::THRESHOLD_REMINDER) {
+            return $negative_since->addDays($remind);
+        }
+
+        // Initial notification
+        // Give it an hour so the async recurring payment has a chance to be finished
+        if ($type == self::THRESHOLD_INITIAL) {
+            return $negative_since->addHours(1);
+        }
+
+        return null;
+    }
+}
diff --git a/src/app/Mail/Helper.php b/src/app/Mail/Helper.php
--- a/src/app/Mail/Helper.php
+++ b/src/app/Mail/Helper.php
@@ -30,4 +30,32 @@
         // HTML output
         return $mail->build()->render(); // @phpstan-ignore-line
     }
+
+    /**
+     * Return user's email addresses, separately for use in To and Cc.
+     *
+     * @param \App\User $user     The user
+     * @param bool      $external Include users's external email
+     *
+     * @return array To address as the first element, Cc address(es) as the second.
+     */
+    public static function userEmails(\App\User $user, bool $external = false): array
+    {
+        $to = $user->email;
+        $cc = [];
+
+        // If user has no mailbox entitlement we should not send
+        // the email to his main address, but use external address, if defined
+        if (!$user->hasSku('mailbox')) {
+            $to = $user->getSetting('external_email');
+        } elseif ($external) {
+            $ext_email = $user->getSetting('external_email');
+
+            if ($ext_email && $ext_email != $to) {
+                $cc[] = $ext_email;
+            }
+        }
+
+        return [$to, $cc];
+    }
 }
diff --git a/src/app/Mail/NegativeBalance.php b/src/app/Mail/NegativeBalance.php
--- a/src/app/Mail/NegativeBalance.php
+++ b/src/app/Mail/NegativeBalance.php
@@ -4,6 +4,7 @@
 
 use App\User;
 use App\Utils;
+use App\Wallet;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
@@ -13,20 +14,25 @@
     use Queueable;
     use SerializesModels;
 
-    /** @var \App\User A user (account) that is behind with payments */
-    protected $account;
+    /** @var \App\Wallet A wallet with a negative balance */
+    protected $wallet;
+
+    /** @var \App\User A wallet controller to whom the email is being sent */
+    protected $user;
 
 
     /**
      * Create a new message instance.
      *
-     * @param \App\User $account A user (account)
+     * @param \App\Wallet $wallet A wallet
+     * @param \App\User   $user   An email recipient
      *
      * @return void
      */
-    public function __construct(User $account)
+    public function __construct(Wallet $wallet, User $user)
     {
-        $this->account = $account;
+        $this->wallet = $wallet;
+        $this->user = $user;
     }
 
     /**
@@ -36,8 +42,6 @@
      */
     public function build()
     {
-        $user = $this->account;
-
         $subject = \trans('mail.negativebalance-subject', ['site' => \config('app.name')]);
 
         $this->view('emails.html.negative_balance')
@@ -46,7 +50,7 @@
             ->with([
                     'site' => \config('app.name'),
                     'subject' => $subject,
-                    'username' => $user->name(true),
+                    'username' => $this->user->name(true),
                     'supportUrl' => \config('app.support_url'),
                     'walletUrl' => Utils::serviceUrl('/wallet'),
             ]);
@@ -63,9 +67,10 @@
      */
     public static function fakeRender(string $type = 'html'): string
     {
+        $wallet = new Wallet();
         $user = new User();
 
-        $mail = new self($user);
+        $mail = new self($wallet, $user);
 
         return Helper::render($mail, $type);
     }
diff --git a/src/app/Mail/NegativeBalance.php b/src/app/Mail/NegativeBalanceBeforeDelete.php
copy from src/app/Mail/NegativeBalance.php
copy to src/app/Mail/NegativeBalanceBeforeDelete.php
--- a/src/app/Mail/NegativeBalance.php
+++ b/src/app/Mail/NegativeBalanceBeforeDelete.php
@@ -2,31 +2,38 @@
 
 namespace App\Mail;
 
+use App\Jobs\WalletCheck;
 use App\User;
 use App\Utils;
+use App\Wallet;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
 
-class NegativeBalance extends Mailable
+class NegativeBalanceBeforeDelete extends Mailable
 {
     use Queueable;
     use SerializesModels;
 
-    /** @var \App\User A user (account) that is behind with payments */
-    protected $account;
+    /** @var \App\Wallet A wallet with a negative balance */
+    protected $wallet;
+
+    /** @var \App\User A wallet controller to whom the email is being sent */
+    protected $user;
 
 
     /**
      * Create a new message instance.
      *
-     * @param \App\User $account A user (account)
+     * @param \App\Wallet $wallet A wallet
+     * @param \App\User   $user   An email recipient
      *
      * @return void
      */
-    public function __construct(User $account)
+    public function __construct(Wallet $wallet, User $user)
     {
-        $this->account = $account;
+        $this->wallet = $wallet;
+        $this->user = $user;
     }
 
     /**
@@ -36,19 +43,20 @@
      */
     public function build()
     {
-        $user = $this->account;
+        $threshold = WalletCheck::threshold($this->wallet, WalletCheck::THRESHOLD_DELETE);
 
-        $subject = \trans('mail.negativebalance-subject', ['site' => \config('app.name')]);
+        $subject = \trans('mail.negativebalancebeforedelete-subject', ['site' => \config('app.name')]);
 
-        $this->view('emails.html.negative_balance')
-            ->text('emails.plain.negative_balance')
+        $this->view('emails.html.negative_balance_before_delete')
+            ->text('emails.plain.negative_balance_before_delete')
             ->subject($subject)
             ->with([
                     'site' => \config('app.name'),
                     'subject' => $subject,
-                    'username' => $user->name(true),
+                    'username' => $this->user->name(true),
                     'supportUrl' => \config('app.support_url'),
                     'walletUrl' => Utils::serviceUrl('/wallet'),
+                    'date' => $threshold->toDateString(),
             ]);
 
         return $this;
@@ -63,9 +71,10 @@
      */
     public static function fakeRender(string $type = 'html'): string
     {
+        $wallet = new Wallet();
         $user = new User();
 
-        $mail = new self($user);
+        $mail = new self($wallet, $user);
 
         return Helper::render($mail, $type);
     }
diff --git a/src/app/Mail/NegativeBalance.php b/src/app/Mail/NegativeBalanceReminder.php
copy from src/app/Mail/NegativeBalance.php
copy to src/app/Mail/NegativeBalanceReminder.php
--- a/src/app/Mail/NegativeBalance.php
+++ b/src/app/Mail/NegativeBalanceReminder.php
@@ -2,31 +2,38 @@
 
 namespace App\Mail;
 
+use App\Jobs\WalletCheck;
 use App\User;
 use App\Utils;
+use App\Wallet;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
 
-class NegativeBalance extends Mailable
+class NegativeBalanceReminder extends Mailable
 {
     use Queueable;
     use SerializesModels;
 
-    /** @var \App\User A user (account) that is behind with payments */
-    protected $account;
+    /** @var \App\Wallet A wallet with a negative balance */
+    protected $wallet;
+
+    /** @var \App\User A wallet controller to whom the email is being sent */
+    protected $user;
 
 
     /**
      * Create a new message instance.
      *
-     * @param \App\User $account A user (account)
+     * @param \App\Wallet $wallet A wallet
+     * @param \App\User   $user   An email recipient
      *
      * @return void
      */
-    public function __construct(User $account)
+    public function __construct(Wallet $wallet, User $user)
     {
-        $this->account = $account;
+        $this->wallet = $wallet;
+        $this->user = $user;
     }
 
     /**
@@ -36,19 +43,20 @@
      */
     public function build()
     {
-        $user = $this->account;
+        $threshold = WalletCheck::threshold($this->wallet, WalletCheck::THRESHOLD_SUSPEND);
 
-        $subject = \trans('mail.negativebalance-subject', ['site' => \config('app.name')]);
+        $subject = \trans('mail.negativebalancereminder-subject', ['site' => \config('app.name')]);
 
-        $this->view('emails.html.negative_balance')
-            ->text('emails.plain.negative_balance')
+        $this->view('emails.html.negative_balance_reminder')
+            ->text('emails.plain.negative_balance_reminder')
             ->subject($subject)
             ->with([
                     'site' => \config('app.name'),
                     'subject' => $subject,
-                    'username' => $user->name(true),
+                    'username' => $this->user->name(true),
                     'supportUrl' => \config('app.support_url'),
                     'walletUrl' => Utils::serviceUrl('/wallet'),
+                    'date' => $threshold->toDateString(),
             ]);
 
         return $this;
@@ -63,9 +71,10 @@
      */
     public static function fakeRender(string $type = 'html'): string
     {
+        $wallet = new Wallet();
         $user = new User();
 
-        $mail = new self($user);
+        $mail = new self($wallet, $user);
 
         return Helper::render($mail, $type);
     }
diff --git a/src/app/Mail/NegativeBalance.php b/src/app/Mail/NegativeBalanceSuspended.php
copy from src/app/Mail/NegativeBalance.php
copy to src/app/Mail/NegativeBalanceSuspended.php
--- a/src/app/Mail/NegativeBalance.php
+++ b/src/app/Mail/NegativeBalanceSuspended.php
@@ -2,31 +2,38 @@
 
 namespace App\Mail;
 
+use App\Jobs\WalletCheck;
 use App\User;
 use App\Utils;
+use App\Wallet;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
 
-class NegativeBalance extends Mailable
+class NegativeBalanceSuspended extends Mailable
 {
     use Queueable;
     use SerializesModels;
 
-    /** @var \App\User A user (account) that is behind with payments */
-    protected $account;
+    /** @var \App\Wallet A wallet with a negative balance */
+    protected $wallet;
+
+    /** @var \App\User A wallet controller to whom the email is being sent */
+    protected $user;
 
 
     /**
      * Create a new message instance.
      *
-     * @param \App\User $account A user (account)
+     * @param \App\Wallet $wallet A wallet
+     * @param \App\User   $user   An email recipient
      *
      * @return void
      */
-    public function __construct(User $account)
+    public function __construct(Wallet $wallet, User $user)
     {
-        $this->account = $account;
+        $this->wallet = $wallet;
+        $this->user = $user;
     }
 
     /**
@@ -36,19 +43,20 @@
      */
     public function build()
     {
-        $user = $this->account;
+        $threshold = WalletCheck::threshold($this->wallet, WalletCheck::THRESHOLD_DELETE);
 
-        $subject = \trans('mail.negativebalance-subject', ['site' => \config('app.name')]);
+        $subject = \trans('mail.negativebalancesuspended-subject', ['site' => \config('app.name')]);
 
-        $this->view('emails.html.negative_balance')
-            ->text('emails.plain.negative_balance')
+        $this->view('emails.html.negative_balance_suspended')
+            ->text('emails.plain.negative_balance_suspended')
             ->subject($subject)
             ->with([
                     'site' => \config('app.name'),
                     'subject' => $subject,
-                    'username' => $user->name(true),
+                    'username' => $this->user->name(true),
                     'supportUrl' => \config('app.support_url'),
                     'walletUrl' => Utils::serviceUrl('/wallet'),
+                    'date' => $threshold->toDateString(),
             ]);
 
         return $this;
@@ -63,9 +71,10 @@
      */
     public static function fakeRender(string $type = 'html'): string
     {
+        $wallet = new Wallet();
         $user = new User();
 
-        $mail = new self($user);
+        $mail = new self($wallet, $user);
 
         return Helper::render($mail, $type);
     }
diff --git a/src/app/Observers/WalletObserver.php b/src/app/Observers/WalletObserver.php
--- a/src/app/Observers/WalletObserver.php
+++ b/src/app/Observers/WalletObserver.php
@@ -69,4 +69,41 @@
 
         return true;
     }
+
+    /**
+     * Handle the wallet "updated" event.
+     *
+     * @param \App\Wallet $wallet The wallet.
+     *
+     * @return void
+     */
+    public function updated(Wallet $wallet)
+    {
+        $negative_since = $wallet->getSetting('balance_negative_since');
+
+        if ($wallet->balance < 0) {
+            if (!$negative_since) {
+                $now = \Carbon\Carbon::now()->toDateTimeString();
+                $wallet->setSetting('balance_negative_since', $now);
+            }
+        } elseif ($negative_since) {
+            $wallet->setSettings([
+                    'balance_negative_since' => null,
+                    'balance_warning_initial' => null,
+                    'balance_warning_reminder' => null,
+                    'balance_warning_suspended' => null,
+                    'balance_warning_before_delete' => null,
+            ]);
+
+            // Unsuspend the account/domains/users
+            foreach ($wallet->entitlements as $entitlement) {
+                if (
+                    $entitlement->entitleable_type == \App\Domain::class
+                    || $entitlement->entitleable_type == \App\User::class
+                ) {
+                    $entitlement->entitleable->unsuspend();
+                }
+            }
+        }
+    }
 }
diff --git a/src/app/User.php b/src/app/User.php
--- a/src/app/User.php
+++ b/src/app/User.php
@@ -427,6 +427,24 @@
         return [];
     }
 
+    /**
+     * 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.
      *
diff --git a/src/resources/lang/en/mail.php b/src/resources/lang/en/mail.php
--- a/src/resources/lang/en/mail.php
+++ b/src/resources/lang/en/mail.php
@@ -17,11 +17,30 @@
     'more-info-html' => "See <a href=\":href\">here</a> for more information.",
     'more-info-text' => "See :href for more information.",
 
-    'negativebalance-subject' => ":site Payment Reminder",
-    'negativebalance-body' => "It has probably skipped your attention that you are behind on paying for your :site account. "
-        . "Consider setting up auto-payment to avoid messages like this in the future.",
+    'negativebalance-subject' => ":site Payment Required",
+    'negativebalance-body' => "This is a notification to let you know that your :site account balance has run into the negative and requires your attention. "
+        . "Consider setting up an automatic payment to avoid messages like this in the future.",
     'negativebalance-body-ext' => "Settle up to keep your account running:",
 
+    'negativebalancereminder-subject' => ":site Payment Reminder",
+    'negativebalancereminder-body' => "It has probably skipped your attention that you are behind on paying for your :site account. "
+        . "Consider setting up an automatic payment to avoid messages like this in the future.",
+    'negativebalancereminder-body-ext' => "Settle up to keep your account running:",
+    'negativebalancereminder-body-warning' => "Please, be aware that your account will be suspended "
+        . "if your account balance is not settled by :date.",
+
+    'negativebalancesuspended-subject' => ":site Account Suspended",
+    'negativebalancesuspended-body' => "Your :site account has been suspended for having a negative balance for too long. "
+        . "Consider setting up an automatic payment to avoid messages like this in the future.",
+    'negativebalancesuspended-body-ext' => "Settle up now to unsuspend your account:",
+    'negativebalancesuspended-body-warning' => "Please, be aware that your account and all its data will be deleted "
+        . "if your account balance is not settled by :date.",
+
+    'negativebalancebeforedelete-subject' => ":site Final Warning",
+    'negativebalancebeforedelete-body' => "This is a final reminder to settle your :site account balance. "
+        . "Your account and all its data will be deleted if your account balance is not settled by :date.",
+    'negativebalancebeforedelete-body-ext' => "Settle up now to keep your account:",
+
     'passwordreset-subject' => ":site Password Reset",
     'passwordreset-body1' => "Someone recently asked to change your :site password.",
     'passwordreset-body2' => "If this was you, use this verification code to complete the process:",
diff --git a/src/resources/views/emails/html/negative_balance_before_delete.blade.php b/src/resources/views/emails/html/negative_balance_before_delete.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/html/negative_balance_before_delete.blade.php
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
+    <head>
+        <meta charset="utf-8">
+    </head>
+    <body>
+        <p>{{ __('mail.header', ['name' => $username]) }}</p>
+
+        <p>{{ __('mail.negativebalancebeforedelete-body', ['site' => $site, 'date' => $date]) }}</p>
+        <p>{{ __('mail.negativebalancebeforedelete-body-ext', ['site' => $site]) }}</p>
+        <p><a href="{{ $walletUrl }}">{{ $walletUrl }}</a></p>
+
+@if ($supportUrl)
+        <p>{{ __('mail.support', ['site' => $site]) }}</p>
+        <p><a href="{{ $supportUrl }}">{{ $supportUrl }}</a></p>
+@endif
+
+        <p>{{ __('mail.footer1') }}</p>
+        <p>{{ __('mail.footer2', ['site' => $site]) }}</p>
+    </body>
+</html>
diff --git a/src/resources/views/emails/html/negative_balance_reminder.blade.php b/src/resources/views/emails/html/negative_balance_reminder.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/html/negative_balance_reminder.blade.php
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
+    <head>
+        <meta charset="utf-8">
+    </head>
+    <body>
+        <p>{{ __('mail.header', ['name' => $username]) }}</p>
+
+        <p>{{ __('mail.negativebalancereminder-body', ['site' => $site]) }}</p>
+        <p>{{ __('mail.negativebalancereminder-body-ext', ['site' => $site]) }}</p>
+        <p><a href="{{ $walletUrl }}">{{ $walletUrl }}</a></p>
+        <p><b>{{ __('mail.negativebalancereminder-body-warning', ['site' => $site, 'date' => $date]) }}</b></p>
+
+@if ($supportUrl)
+        <p>{{ __('mail.support', ['site' => $site]) }}</p>
+        <p><a href="{{ $supportUrl }}">{{ $supportUrl }}</a></p>
+@endif
+
+        <p>{{ __('mail.footer1') }}</p>
+        <p>{{ __('mail.footer2', ['site' => $site]) }}</p>
+    </body>
+</html>
diff --git a/src/resources/views/emails/html/negative_balance_suspended.blade.php b/src/resources/views/emails/html/negative_balance_suspended.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/html/negative_balance_suspended.blade.php
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
+    <head>
+        <meta charset="utf-8">
+    </head>
+    <body>
+        <p>{{ __('mail.header', ['name' => $username]) }}</p>
+
+        <p>{{ __('mail.negativebalancesuspended-body', ['site' => $site]) }}</p>
+        <p>{{ __('mail.negativebalancesuspended-body-ext', ['site' => $site]) }}</p>
+        <p><a href="{{ $walletUrl }}">{{ $walletUrl }}</a></p>
+        <p><b>{{ __('mail.negativebalancesuspended-body-warning', ['site' => $site, 'date' => $date]) }}</b></p>
+
+@if ($supportUrl)
+        <p>{{ __('mail.support', ['site' => $site]) }}</p>
+        <p><a href="{{ $supportUrl }}">{{ $supportUrl }}</a></p>
+@endif
+
+        <p>{{ __('mail.footer1') }}</p>
+        <p>{{ __('mail.footer2', ['site' => $site]) }}</p>
+    </body>
+</html>
diff --git a/src/resources/views/emails/plain/negative_balance_before_delete.blade.php b/src/resources/views/emails/plain/negative_balance_before_delete.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/plain/negative_balance_before_delete.blade.php
@@ -0,0 +1,17 @@
+{!! __('mail.header', ['name' => $username]) !!}
+
+{!! __('mail.negativebalancebeforedelete-body', ['site' => $site, 'date' => $date]) !!}
+
+{!! __('mail.negativebalancebeforedelete-body-ext', ['site' => $site]) !!}
+
+{!! $walletUrl !!}
+
+@if ($supportUrl)
+{!! __('mail.support', ['site' => $site]) !!}
+
+{!! $supportUrl !!}
+@endif
+
+-- 
+{!! __('mail.footer1') !!}
+{!! __('mail.footer2', ['site' => $site]) !!}
diff --git a/src/resources/views/emails/plain/negative_balance_reminder.blade.php b/src/resources/views/emails/plain/negative_balance_reminder.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/plain/negative_balance_reminder.blade.php
@@ -0,0 +1,19 @@
+{!! __('mail.header', ['name' => $username]) !!}
+
+{!! __('mail.negativebalancereminder-body', ['site' => $site]) !!}
+
+{!! __('mail.negativebalancereminder-body-ext', ['site' => $site]) !!}
+
+{!! $walletUrl !!}
+
+{!! __('mail.negativebalancereminder-body-warning', ['site' => $site, 'date' => $date]) !!}
+
+@if ($supportUrl)
+{!! __('mail.support', ['site' => $site]) !!}
+
+{!! $supportUrl !!}
+@endif
+
+-- 
+{!! __('mail.footer1') !!}
+{!! __('mail.footer2', ['site' => $site]) !!}
diff --git a/src/resources/views/emails/plain/negative_balance_suspended.blade.php b/src/resources/views/emails/plain/negative_balance_suspended.blade.php
new file mode 100644
--- /dev/null
+++ b/src/resources/views/emails/plain/negative_balance_suspended.blade.php
@@ -0,0 +1,19 @@
+{!! __('mail.header', ['name' => $username]) !!}
+
+{!! __('mail.negativebalancesuspended-body', ['site' => $site]) !!}
+
+{!! __('mail.negativebalancesuspended-body-ext', ['site' => $site]) !!}
+
+{!! $walletUrl !!}
+
+{!! __('mail.negativebalancesuspended-body-warning', ['site' => $site, 'date' => $date]) !!}
+
+@if ($supportUrl)
+{!! __('mail.support', ['site' => $site]) !!}
+
+{!! $supportUrl !!}
+@endif
+
+-- 
+{!! __('mail.footer1') !!}
+{!! __('mail.footer2', ['site' => $site]) !!}
diff --git a/src/tests/Feature/Jobs/UserUpdateTest.php b/src/tests/Feature/Jobs/UserUpdateTest.php
--- a/src/tests/Feature/Jobs/UserUpdateTest.php
+++ b/src/tests/Feature/Jobs/UserUpdateTest.php
@@ -19,6 +19,9 @@
         $this->deleteTestUser('new-job-user@' . \config('app.domain'));
     }
 
+    /**
+     * {@inheritDoc}
+     */
     public function tearDown(): void
     {
         $this->deleteTestUser('new-job-user@' . \config('app.domain'));
diff --git a/src/tests/Feature/Jobs/UserVerifyTest.php b/src/tests/Feature/Jobs/UserVerifyTest.php
--- a/src/tests/Feature/Jobs/UserVerifyTest.php
+++ b/src/tests/Feature/Jobs/UserVerifyTest.php
@@ -10,6 +10,9 @@
 
 class UserVerifyTest extends TestCase
 {
+    /**
+     * {@inheritDoc}
+     */
     public function setUp(): void
     {
         parent::setUp();
@@ -19,6 +22,9 @@
         $ned->save();
     }
 
+    /**
+     * {@inheritDoc}
+     */
     public function tearDown(): void
     {
         $ned = $this->getTestUser('ned@kolab.org');
diff --git a/src/tests/Feature/Jobs/WalletCheckTest.php b/src/tests/Feature/Jobs/WalletCheckTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Feature/Jobs/WalletCheckTest.php
@@ -0,0 +1,245 @@
+<?php
+
+namespace Tests\Feature\Jobs;
+
+use App\Jobs\WalletCheck;
+use App\User;
+use Carbon\Carbon;
+use Illuminate\Support\Facades\Mail;
+use Tests\TestCase;
+
+class WalletCheckTest extends TestCase
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function setUp(): void
+    {
+        parent::setUp();
+
+        $ned = $this->getTestUser('ned@kolab.org');
+        if ($ned->isSuspended()) {
+            $ned->status -= User::STATUS_SUSPENDED;
+            $ned->save();
+        }
+
+        $this->deleteTestUser('wallet-check@kolabnow.com');
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function tearDown(): void
+    {
+        $ned = $this->getTestUser('ned@kolab.org');
+        if ($ned->isSuspended()) {
+            $ned->status -= User::STATUS_SUSPENDED;
+            $ned->save();
+        }
+
+        $this->deleteTestUser('wallet-check@kolabnow.com');
+
+        parent::tearDown();
+    }
+
+    /**
+     * Test job handle, initial negative-balance notification
+     */
+    public function testHandleInitial(): void
+    {
+        Mail::fake();
+
+        $user = $this->getTestUser('ned@kolab.org');
+        $user->setSetting('external_email', 'external@test.com');
+        $wallet = $user->wallets()->first();
+        $now = Carbon::now();
+
+        // Balance is not negative
+        $wallet->balance = 0;
+        $wallet->save();
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+
+        // Balance is not negative now
+        $wallet->balance = -100;
+        $wallet->save();
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+
+        // Balance turned negative 2 hours ago, expect mail sent
+        $wallet->setSetting('balance_negative_since', $now->subHours(2)->toDateTimeString());
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        // Assert the mail was sent to the user's email, but not to his external email
+        Mail::assertSent(\App\Mail\NegativeBalance::class, 1);
+        Mail::assertSent(\App\Mail\NegativeBalance::class, function ($mail) use ($user) {
+            return $mail->hasTo($user->email) && !$mail->hasCc('external@test.com');
+        });
+
+        // Run the job again to make sure the notification is not sent again
+        Mail::fake();
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+    }
+
+    /**
+     * Test job handle, reminder notification
+     */
+    public function testHandleReminder(): void
+    {
+        Mail::fake();
+
+        $user = $this->getTestUser('ned@kolab.org');
+        $user->setSetting('external_email', 'external@test.com');
+        $wallet = $user->wallets()->first();
+        $now = Carbon::now();
+
+        // Balance turned negative 7+1 days ago, expect mail sent
+        $wallet->setSetting('balance_negative_since', $now->subDays(7 + 1)->toDateTimeString());
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        // Assert the mail was sent to the user's email, but not to his external email
+        Mail::assertSent(\App\Mail\NegativeBalanceReminder::class, 1);
+        Mail::assertSent(\App\Mail\NegativeBalanceReminder::class, function ($mail) use ($user) {
+            return $mail->hasTo($user->email) && !$mail->hasCc('external@test.com');
+        });
+
+        // Run the job again to make sure the notification is not sent again
+        Mail::fake();
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+    }
+
+    /**
+     * Test job handle, account suspending
+     */
+    public function testHandleSuspended(): void
+    {
+        Mail::fake();
+
+        $user = $this->getTestUser('ned@kolab.org');
+        $user->setSetting('external_email', 'external@test.com');
+        $wallet = $user->wallets()->first();
+        $now = Carbon::now();
+
+        // Balance turned negative 7+14+1 days ago, expect mail sent
+        $days = 7 + 14 + 1;
+        $wallet->setSetting('balance_negative_since', $now->subDays($days)->toDateTimeString());
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        // Assert the mail was sent to the user's email, but not to his external email
+        Mail::assertSent(\App\Mail\NegativeBalanceSuspended::class, 1);
+        Mail::assertSent(\App\Mail\NegativeBalanceSuspended::class, function ($mail) use ($user) {
+            return $mail->hasTo($user->email) && !$mail->hasCc('external@test.com');
+        });
+
+        // Check that it has been suspended
+        $this->assertTrue($user->fresh()->isSuspended());
+
+        // TODO: Test that group account members/domain are also being suspended
+        /*
+        foreach ($wallet->entitlements()->fresh()->get() as $entitlement) {
+            if (
+                $entitlement->entitleable_type == \App\Domain::class
+                || $entitlement->entitleable_type == \App\User::class
+            ) {
+                $this->assertTrue($entitlement->entitleable->isSuspended());
+            }
+        }
+        */
+
+        // Run the job again to make sure the notification is not sent again
+        Mail::fake();
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+    }
+
+    /**
+     * Test job handle, final warning before delete
+     */
+    public function testHandleBeforeDelete(): void
+    {
+        Mail::fake();
+
+        $user = $this->getTestUser('ned@kolab.org');
+        $user->setSetting('external_email', 'external@test.com');
+        $wallet = $user->wallets()->first();
+        $now = Carbon::now();
+
+        // Balance turned negative 7+14+21-3+1 days ago, expect mail sent
+        $days = 7 + 14 + 21 - 3 + 1;
+        $wallet->setSetting('balance_negative_since', $now->subDays($days)->toDateTimeString());
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        // Assert the mail was sent to the user's email, and his external email
+        Mail::assertSent(\App\Mail\NegativeBalanceBeforeDelete::class, 1);
+        Mail::assertSent(\App\Mail\NegativeBalanceBeforeDelete::class, function ($mail) use ($user) {
+            return $mail->hasTo($user->email) && $mail->hasCc('external@test.com');
+        });
+
+        // Check that it has not been deleted yet
+        $this->assertFalse($user->fresh()->isDeleted());
+
+        // Run the job again to make sure the notification is not sent again
+        Mail::fake();
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+    }
+
+    /**
+     * Test job handle, account delete
+     */
+    public function testHandleDelete(): void
+    {
+        Mail::fake();
+
+        $user = $this->getTestUser('wallet-check@kolabnow.com');
+        $wallet = $user->wallets()->first();
+        $wallet->balance = -100;
+        $wallet->save();
+        $now = Carbon::now();
+
+        $package = \App\Package::where('title', 'kolab')->first();
+        $user->assignPackage($package);
+
+        $this->assertFalse($user->isDeleted());
+        $this->assertCount(4, $user->entitlements()->get());
+
+        // Balance turned negative 7+14+21+1 days ago, expect mail sent
+        $days = 7 + 14 + 21 + 1;
+        $wallet->setSetting('balance_negative_since', $now->subDays($days)->toDateTimeString());
+
+        $job = new WalletCheck($wallet);
+        $job->handle();
+
+        Mail::assertNothingSent();
+
+        // Check that it has not been deleted
+        $this->assertTrue($user->fresh()->trashed());
+        $this->assertCount(0, $user->entitlements()->get());
+
+        // TODO: Test it deletes all members of the group account
+    }
+}
diff --git a/src/tests/Unit/Mail/HelperTest.php b/src/tests/Unit/Mail/HelperTest.php
new file mode 100644
--- /dev/null
+++ b/src/tests/Unit/Mail/HelperTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\Helper;
+use Tests\TestCase;
+
+class HelperTest extends TestCase
+{
+    /**
+     * Test Helper::userEmails()
+     */
+    public function testUserEmails(): void
+    {
+        $this->markTestIncomplete();
+    }
+}
diff --git a/src/tests/Unit/Mail/NegativeBalanceTest.php b/src/tests/Unit/Mail/NegativeBalanceBeforeDeleteTest.php
copy from src/tests/Unit/Mail/NegativeBalanceTest.php
copy to src/tests/Unit/Mail/NegativeBalanceBeforeDeleteTest.php
--- a/src/tests/Unit/Mail/NegativeBalanceTest.php
+++ b/src/tests/Unit/Mail/NegativeBalanceBeforeDeleteTest.php
@@ -2,12 +2,14 @@
 
 namespace Tests\Unit\Mail;
 
-use App\Mail\NegativeBalance;
+use App\Jobs\WalletCheck;
+use App\Mail\NegativeBalanceBeforeDelete;
 use App\User;
+use App\Wallet;
 use Tests\MailInterceptTrait;
 use Tests\TestCase;
 
-class NegativeBalanceTest extends TestCase
+class NegativeBalanceBeforeDeleteTest extends TestCase
 {
     use MailInterceptTrait;
 
@@ -16,13 +18,18 @@
      */
     public function testBuild(): void
     {
-        $user = new User();
+        $user = $this->getTestUser('ned@kolab.org');
+        $wallet = $user->wallets->first();
+        $wallet->balance = -100;
+        $wallet->save();
+
+        $threshold = WalletCheck::threshold($wallet, WalletCheck::THRESHOLD_DELETE);
 
         \config([
                 'app.support_url' => 'https://kolab.org/support',
         ]);
 
-        $mail = $this->fakeMail(new NegativeBalance($user));
+        $mail = $this->fakeMail(new NegativeBalanceBeforeDelete($wallet, $user));
 
         $html = $mail['html'];
         $plain = $mail['plain'];
@@ -33,20 +40,22 @@
         $supportLink = sprintf('<a href="%s">%s</a>', $supportUrl, $supportUrl);
         $appName = \config('app.name');
 
-        $this->assertMailSubject("$appName Payment Reminder", $mail['message']);
+        $this->assertMailSubject("$appName Final Warning", $mail['message']);
 
         $this->assertStringStartsWith('<!DOCTYPE html>', $html);
         $this->assertTrue(strpos($html, $user->name(true)) > 0);
         $this->assertTrue(strpos($html, $walletLink) > 0);
         $this->assertTrue(strpos($html, $supportLink) > 0);
-        $this->assertTrue(strpos($html, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($html, "This is a final reminder to settle your $appName") > 0);
+        $this->assertTrue(strpos($html, $threshold->toDateString()) > 0);
         $this->assertTrue(strpos($html, "$appName Support") > 0);
         $this->assertTrue(strpos($html, "$appName Team") > 0);
 
         $this->assertStringStartsWith('Dear ' . $user->name(true), $plain);
         $this->assertTrue(strpos($plain, $walletUrl) > 0);
         $this->assertTrue(strpos($plain, $supportUrl) > 0);
-        $this->assertTrue(strpos($plain, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($plain, "This is a final reminder to settle your $appName") > 0);
+        $this->assertTrue(strpos($plain, $threshold->toDateString()) > 0);
         $this->assertTrue(strpos($plain, "$appName Support") > 0);
         $this->assertTrue(strpos($plain, "$appName Team") > 0);
     }
diff --git a/src/tests/Unit/Mail/NegativeBalanceTest.php b/src/tests/Unit/Mail/NegativeBalanceReminderTest.php
copy from src/tests/Unit/Mail/NegativeBalanceTest.php
copy to src/tests/Unit/Mail/NegativeBalanceReminderTest.php
--- a/src/tests/Unit/Mail/NegativeBalanceTest.php
+++ b/src/tests/Unit/Mail/NegativeBalanceReminderTest.php
@@ -2,12 +2,14 @@
 
 namespace Tests\Unit\Mail;
 
-use App\Mail\NegativeBalance;
+use App\Jobs\WalletCheck;
+use App\Mail\NegativeBalanceReminder;
 use App\User;
+use App\Wallet;
 use Tests\MailInterceptTrait;
 use Tests\TestCase;
 
-class NegativeBalanceTest extends TestCase
+class NegativeBalanceReminderTest extends TestCase
 {
     use MailInterceptTrait;
 
@@ -16,13 +18,18 @@
      */
     public function testBuild(): void
     {
-        $user = new User();
+        $user = $this->getTestUser('ned@kolab.org');
+        $wallet = $user->wallets->first();
+        $wallet->balance = -100;
+        $wallet->save();
+
+        $threshold = WalletCheck::threshold($wallet, WalletCheck::THRESHOLD_SUSPEND);
 
         \config([
                 'app.support_url' => 'https://kolab.org/support',
         ]);
 
-        $mail = $this->fakeMail(new NegativeBalance($user));
+        $mail = $this->fakeMail(new NegativeBalanceReminder($wallet, $user));
 
         $html = $mail['html'];
         $plain = $mail['plain'];
@@ -39,14 +46,16 @@
         $this->assertTrue(strpos($html, $user->name(true)) > 0);
         $this->assertTrue(strpos($html, $walletLink) > 0);
         $this->assertTrue(strpos($html, $supportLink) > 0);
-        $this->assertTrue(strpos($html, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($html, "you are behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($html, $threshold->toDateString()) > 0);
         $this->assertTrue(strpos($html, "$appName Support") > 0);
         $this->assertTrue(strpos($html, "$appName Team") > 0);
 
         $this->assertStringStartsWith('Dear ' . $user->name(true), $plain);
         $this->assertTrue(strpos($plain, $walletUrl) > 0);
         $this->assertTrue(strpos($plain, $supportUrl) > 0);
-        $this->assertTrue(strpos($plain, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($plain, "you are behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($plain, $threshold->toDateString()) > 0);
         $this->assertTrue(strpos($plain, "$appName Support") > 0);
         $this->assertTrue(strpos($plain, "$appName Team") > 0);
     }
diff --git a/src/tests/Unit/Mail/NegativeBalanceTest.php b/src/tests/Unit/Mail/NegativeBalanceSuspendedTest.php
copy from src/tests/Unit/Mail/NegativeBalanceTest.php
copy to src/tests/Unit/Mail/NegativeBalanceSuspendedTest.php
--- a/src/tests/Unit/Mail/NegativeBalanceTest.php
+++ b/src/tests/Unit/Mail/NegativeBalanceSuspendedTest.php
@@ -2,12 +2,14 @@
 
 namespace Tests\Unit\Mail;
 
-use App\Mail\NegativeBalance;
+use App\Jobs\WalletCheck;
+use App\Mail\NegativeBalanceSuspended;
 use App\User;
+use App\Wallet;
 use Tests\MailInterceptTrait;
 use Tests\TestCase;
 
-class NegativeBalanceTest extends TestCase
+class NegativeBalanceSuspendedTest extends TestCase
 {
     use MailInterceptTrait;
 
@@ -16,13 +18,18 @@
      */
     public function testBuild(): void
     {
-        $user = new User();
+        $user = $this->getTestUser('ned@kolab.org');
+        $wallet = $user->wallets->first();
+        $wallet->balance = -100;
+        $wallet->save();
+
+        $threshold = WalletCheck::threshold($wallet, WalletCheck::THRESHOLD_DELETE);
 
         \config([
                 'app.support_url' => 'https://kolab.org/support',
         ]);
 
-        $mail = $this->fakeMail(new NegativeBalance($user));
+        $mail = $this->fakeMail(new NegativeBalanceSuspended($wallet, $user));
 
         $html = $mail['html'];
         $plain = $mail['plain'];
@@ -33,20 +40,22 @@
         $supportLink = sprintf('<a href="%s">%s</a>', $supportUrl, $supportUrl);
         $appName = \config('app.name');
 
-        $this->assertMailSubject("$appName Payment Reminder", $mail['message']);
+        $this->assertMailSubject("$appName Account Suspended", $mail['message']);
 
         $this->assertStringStartsWith('<!DOCTYPE html>', $html);
         $this->assertTrue(strpos($html, $user->name(true)) > 0);
         $this->assertTrue(strpos($html, $walletLink) > 0);
         $this->assertTrue(strpos($html, $supportLink) > 0);
-        $this->assertTrue(strpos($html, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($html, "Your $appName account has been suspended") > 0);
+        $this->assertTrue(strpos($html, $threshold->toDateString()) > 0);
         $this->assertTrue(strpos($html, "$appName Support") > 0);
         $this->assertTrue(strpos($html, "$appName Team") > 0);
 
         $this->assertStringStartsWith('Dear ' . $user->name(true), $plain);
         $this->assertTrue(strpos($plain, $walletUrl) > 0);
         $this->assertTrue(strpos($plain, $supportUrl) > 0);
-        $this->assertTrue(strpos($plain, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($plain, "Your $appName account has been suspended") > 0);
+        $this->assertTrue(strpos($plain, $threshold->toDateString()) > 0);
         $this->assertTrue(strpos($plain, "$appName Support") > 0);
         $this->assertTrue(strpos($plain, "$appName Team") > 0);
     }
diff --git a/src/tests/Unit/Mail/NegativeBalanceTest.php b/src/tests/Unit/Mail/NegativeBalanceTest.php
--- a/src/tests/Unit/Mail/NegativeBalanceTest.php
+++ b/src/tests/Unit/Mail/NegativeBalanceTest.php
@@ -4,6 +4,7 @@
 
 use App\Mail\NegativeBalance;
 use App\User;
+use App\Wallet;
 use Tests\MailInterceptTrait;
 use Tests\TestCase;
 
@@ -17,12 +18,13 @@
     public function testBuild(): void
     {
         $user = new User();
+        $wallet = new Wallet();
 
         \config([
                 'app.support_url' => 'https://kolab.org/support',
         ]);
 
-        $mail = $this->fakeMail(new NegativeBalance($user));
+        $mail = $this->fakeMail(new NegativeBalance($wallet, $user));
 
         $html = $mail['html'];
         $plain = $mail['plain'];
@@ -33,20 +35,20 @@
         $supportLink = sprintf('<a href="%s">%s</a>', $supportUrl, $supportUrl);
         $appName = \config('app.name');
 
-        $this->assertMailSubject("$appName Payment Reminder", $mail['message']);
+        $this->assertMailSubject("$appName Payment Required", $mail['message']);
 
         $this->assertStringStartsWith('<!DOCTYPE html>', $html);
         $this->assertTrue(strpos($html, $user->name(true)) > 0);
         $this->assertTrue(strpos($html, $walletLink) > 0);
         $this->assertTrue(strpos($html, $supportLink) > 0);
-        $this->assertTrue(strpos($html, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($html, "your $appName account balance has run into the nega") > 0);
         $this->assertTrue(strpos($html, "$appName Support") > 0);
         $this->assertTrue(strpos($html, "$appName Team") > 0);
 
         $this->assertStringStartsWith('Dear ' . $user->name(true), $plain);
         $this->assertTrue(strpos($plain, $walletUrl) > 0);
         $this->assertTrue(strpos($plain, $supportUrl) > 0);
-        $this->assertTrue(strpos($plain, "behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($plain, "your $appName account balance has run into the nega") > 0);
         $this->assertTrue(strpos($plain, "$appName Support") > 0);
         $this->assertTrue(strpos($plain, "$appName Team") > 0);
     }