diff --git a/src/.env.example b/src/.env.example
index 2811f18d..6c2b584b 100644
--- a/src/.env.example
+++ b/src/.env.example
@@ -1,98 +1,101 @@
 APP_NAME=Kolab
 APP_ENV=local
 APP_KEY=
 APP_DEBUG=true
 APP_URL=http://127.0.0.1:8000
 APP_PUBLIC_URL=
 APP_DOMAIN=kolabnow.com
 
 LOG_CHANNEL=stack
 
 DB_CONNECTION=mysql
 DB_DATABASE=kolabdev
 DB_HOST=127.0.0.1
 DB_PASSWORD=kolab
 DB_PORT=3306
 DB_USERNAME=kolabdev
 
 BROADCAST_DRIVER=log
 CACHE_DRIVER=redis
 
 QUEUE_CONNECTION=redis
 
 SESSION_DRIVER=file
 SESSION_LIFETIME=120
 
 2FA_DSN=mysql://roundcube:Welcome2KolabSystems@127.0.0.1/roundcube
 2FA_TOTP_DIGITS=6
 2FA_TOTP_INTERVAL=30
 2FA_TOTP_DIGEST=sha1
 
 IMAP_URI=ssl://127.0.0.1:993
 IMAP_ADMIN_LOGIN=cyrus-admin
 IMAP_ADMIN_PASSWORD=Welcome2KolabSystems
 IMAP_VERIFY_HOST=false
 IMAP_VERIFY_PEER=false
 
 LDAP_BASE_DN="dc=mgmt,dc=com"
 LDAP_DOMAIN_BASE_DN="ou=Domains,dc=mgmt,dc=com"
 LDAP_HOSTS=127.0.0.1
 LDAP_PORT=389
 LDAP_SERVICE_BIND_DN="uid=kolab-service,ou=Special Users,dc=mgmt,dc=com"
 LDAP_SERVICE_BIND_PW="Welcome2KolabSystems"
 LDAP_USE_SSL=false
 LDAP_USE_TLS=false
 
 # Administrative
 LDAP_ADMIN_BIND_DN="cn=Directory Manager"
 LDAP_ADMIN_BIND_PW="Welcome2KolabSystems"
 LDAP_ADMIN_ROOT_DN="dc=mgmt,dc=com"
 
 # Hosted (public registration)
 LDAP_HOSTED_BIND_DN="uid=hosted-kolab-service,ou=Special Users,dc=mgmt,dc=com"
 LDAP_HOSTED_BIND_PW="Welcome2KolabSystems"
 LDAP_HOSTED_ROOT_DN="dc=hosted,dc=com"
 
 REDIS_HOST=127.0.0.1
 REDIS_PASSWORD=null
 REDIS_PORT=6379
 
 SWOOLE_HTTP_HOST=127.0.0.1
 SWOOLE_HTTP_PORT=8000
 
 PAYMENT_PROVIDER=
 MOLLIE_KEY=
 STRIPE_KEY=
 STRIPE_PUBLIC_KEY=
 STRIPE_WEBHOOK_SECRET=
 
 MAIL_DRIVER=smtp
 MAIL_HOST=smtp.mailtrap.io
 MAIL_PORT=2525
 MAIL_USERNAME=null
 MAIL_PASSWORD=null
 MAIL_ENCRYPTION=null
 MAIL_FROM_ADDRESS="noreply@example.com"
 MAIL_FROM_NAME="Example.com"
 MAIL_REPLYTO_ADDRESS=null
 MAIL_REPLYTO_NAME=null
 
 DNS_TTL=3600
 DNS_SPF="v=spf1 mx -all"
 DNS_STATIC="%s.    MX  10 ext-mx01.mykolab.com."
 DNS_COPY_FROM=null
 
 AWS_ACCESS_KEY_ID=
 AWS_SECRET_ACCESS_KEY=
 AWS_DEFAULT_REGION=us-east-1
 AWS_BUCKET=
 
 PUSHER_APP_ID=
 PUSHER_APP_KEY=
 PUSHER_APP_SECRET=
 PUSHER_APP_CLUSTER=mt1
 
 MIX_PUSHER_APP_KEY="${PUSHER_APP_KEY}"
 MIX_PUSHER_APP_CLUSTER="${PUSHER_APP_CLUSTER}"
 
 JWT_SECRET=
+
+KB_ACCOUNT_DELETE=
+KB_ACCOUNT_SUSPENDED=
diff --git a/src/app/Console/Development/TemplateRender.php b/src/app/Console/Development/TemplateRender.php
new file mode 100644
index 00000000..50893431
--- /dev/null
+++ b/src/app/Console/Development/TemplateRender.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace App\Console\Development;
+
+use Illuminate\Console\Command;
+
+class TemplateRender extends Command
+{
+    /**
+     * The name and signature of the console command.
+     *
+     * @var string
+     */
+    protected $signature = 'template:render {template}';
+
+    /**
+     * The console command description.
+     *
+     * @var string
+     */
+    protected $description = "Render a email template.";
+
+    /**
+     * Execute the console command.
+     *
+     * @return mixed
+     */
+    public function handle()
+    {
+        $template = $this->argument('template');
+        $template = str_replace('/', '\\', $template);
+
+        $class = '\\App\\' . $template;
+
+        echo $class::fakeRender();
+    }
+}
diff --git a/src/app/Mail/NegativeBalance.php b/src/app/Mail/NegativeBalance.php
new file mode 100644
index 00000000..54ff3371
--- /dev/null
+++ b/src/app/Mail/NegativeBalance.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace App\Mail;
+
+use App\User;
+use App\Utils;
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class NegativeBalance extends Mailable
+{
+    use Queueable;
+    use SerializesModels;
+
+    /** @var \App\User A user (account) that is behind with payments */
+    protected $account;
+
+
+    /**
+     * Create a new message instance.
+     *
+     * @param \App\User $account A user (account)
+     *
+     * @return void
+     */
+    public function __construct(User $account)
+    {
+        $this->account = $account;
+    }
+
+    /**
+     * Build the message.
+     *
+     * @return $this
+     */
+    public function build()
+    {
+        $user = $this->account;
+
+        $subject = \trans('mail.negativebalance-subject', ['site' => \config('app.name')]);
+
+        $this->view('emails.negative_balance')
+            ->subject($subject)
+            ->with([
+                    'site' => \config('app.name'),
+                    'subject' => $subject,
+                    'username' => $user->name(true),
+                    'supportUrl' => \config('app.support_url'),
+                    'walletUrl' => Utils::serviceUrl('/wallet'),
+            ]);
+
+        return $this;
+    }
+
+    /**
+     * Render the mail template with fake data
+     *
+     * @return string HTML output
+     */
+    public static function fakeRender(): string
+    {
+        $user = new User();
+
+        $mail = new self($user);
+
+        return $mail->build()->render();
+    }
+}
diff --git a/src/app/Mail/PasswordReset.php b/src/app/Mail/PasswordReset.php
index 7f65d741..1cdd2a96 100644
--- a/src/app/Mail/PasswordReset.php
+++ b/src/app/Mail/PasswordReset.php
@@ -1,57 +1,80 @@
 <?php
 
 namespace App\Mail;
 
+use App\User;
 use App\VerificationCode;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Str;
 
 class PasswordReset extends Mailable
 {
     use Queueable;
     use SerializesModels;
 
     /** @var \App\VerificationCode A verification code object */
     protected $code;
 
 
     /**
      * Create a new message instance.
      *
      * @param \App\VerificationCode $code A verification code object
      *
      * @return void
      */
     public function __construct(VerificationCode $code)
     {
         $this->code = $code;
     }
 
     /**
      * Build the message.
      *
      * @return $this
      */
     public function build()
     {
         $href = sprintf(
             '%s/login/reset/%s-%s',
             \config('app.url'),
             $this->code->short_code,
             $this->code->code
         );
 
         $this->view('emails.password_reset')
             ->subject(__('mail.passwordreset-subject', ['site' => \config('app.name')]))
             ->with([
                     'site' => \config('app.name'),
                     'code' => $this->code->code,
                     'short_code' => $this->code->short_code,
                     'link' => sprintf('<a href="%s">%s</a>', $href, $href),
                     'username' => $this->code->user->name(true)
             ]);
 
         return $this;
     }
+
+    /**
+     * Render the mail template with fake data
+     *
+     * @return string HTML output
+     */
+    public static function fakeRender(): string
+    {
+        $code = new VerificationCode([
+                'code' => Str::random(VerificationCode::CODE_LENGTH),
+                'short_code' => VerificationCode::generateShortCode(),
+        ]);
+
+        $code->user = new User([
+              'email' => 'test@' . \config('app.domain'),
+        ]);
+
+        $mail = new self($code);
+
+        return $mail->build()->render();
+    }
 }
diff --git a/src/app/Mail/SignupVerification.php b/src/app/Mail/SignupVerification.php
index 9036420f..99c98672 100644
--- a/src/app/Mail/SignupVerification.php
+++ b/src/app/Mail/SignupVerification.php
@@ -1,63 +1,87 @@
 <?php
 
 namespace App\Mail;
 
 use App\SignupCode;
 use Illuminate\Bus\Queueable;
 use Illuminate\Mail\Mailable;
 use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Str;
 
 class SignupVerification extends Mailable
 {
     use Queueable;
     use SerializesModels;
 
     /** @var SignupCode A signup verification code object */
     protected $code;
 
 
     /**
      * Create a new message instance.
      *
      * @param SignupCode $code A signup verification code object
      *
      * @return void
      */
     public function __construct(SignupCode $code)
     {
         $this->code = $code;
     }
 
     /**
      * Build the message.
      *
      * @return $this
      */
     public function build()
     {
         $href = sprintf(
             '%s/signup/%s-%s',
             \config('app.url'),
             $this->code->short_code,
             $this->code->code
         );
 
         $username = $this->code->data['first_name'] ?? '';
         if (!empty($this->code->data['last_name'])) {
             $username .= ' ' . $this->code->data['last_name'];
         }
         $username = trim($username);
 
         $this->view('emails.signup_code')
             ->subject(__('mail.signupcode-subject', ['site' => \config('app.name')]))
             ->with([
                     'site' => \config('app.name'),
                     'username' => $username ?: 'User',
                     'code' => $this->code->code,
                     'short_code' => $this->code->short_code,
                     'link' => sprintf('<a href="%s">%s</a>', $href, $href),
             ]);
 
         return $this;
     }
+
+    /**
+     * Render the mail template with fake data
+     *
+     * @return string HTML output
+     */
+    public static function fakeRender(): string
+    {
+        $code = new SignupCode([
+                'code' => Str::random(SignupCode::CODE_LENGTH),
+                'short_code' => SignupCode::generateShortCode(),
+                'data' => [
+                    'email' => 'test@' . \config('app.domain'),
+                    'first_name' => 'Firstname',
+                    'last_name' => 'Lastname',
+                ],
+        ]);
+
+
+        $mail = new self($code);
+
+        return $mail->build()->render();
+    }
 }
diff --git a/src/app/Mail/SuspendedDebtor.php b/src/app/Mail/SuspendedDebtor.php
new file mode 100644
index 00000000..e3509f91
--- /dev/null
+++ b/src/app/Mail/SuspendedDebtor.php
@@ -0,0 +1,77 @@
+<?php
+
+namespace App\Mail;
+
+use App\User;
+use App\Utils;
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Queue\SerializesModels;
+
+class SuspendedDebtor extends Mailable
+{
+    use Queueable;
+    use SerializesModels;
+
+    /** @var \App\User A suspended user (account) */
+    protected $account;
+
+
+    /**
+     * Create a new message instance.
+     *
+     * @param \App\User $account A suspended user (account)
+     *
+     * @return void
+     */
+    public function __construct(User $account)
+    {
+        $this->account = $account;
+    }
+
+    /**
+     * Build the message.
+     *
+     * @return $this
+     */
+    public function build()
+    {
+        $user = $this->account;
+
+        $subject = \trans('mail.suspendeddebtor-subject', ['site' => \config('app.name')]);
+
+        $moreInfo = null;
+        if ($moreInfoUrl = \config('app.kb.account_suspended')) {
+            $moreInfo = \trans('mail.more-info-html', ['href' => $moreInfoUrl]);
+        }
+
+        $this->view('emails.suspended_debtor')
+            ->subject($subject)
+            ->with([
+                    'site' => \config('app.name'),
+                    'subject' => $subject,
+                    'username' => $user->name(true),
+                    'cancelUrl' => \config('app.kb.account_delete'),
+                    'supportUrl' => \config('app.support_url'),
+                    'walletUrl' => Utils::serviceUrl('/wallet'),
+                    'moreInfo' => $moreInfo,
+                    'days' => 14 // TODO: Configurable
+            ]);
+
+        return $this;
+    }
+
+    /**
+     * Render the mail template with fake data
+     *
+     * @return string HTML output
+     */
+    public static function fakeRender(): string
+    {
+        $user = new User();
+
+        $mail = new self($user);
+
+        return $mail->build()->render();
+    }
+}
diff --git a/src/config/app.php b/src/config/app.php
index 9dd7ddac..8dce8ef0 100644
--- a/src/config/app.php
+++ b/src/config/app.php
@@ -1,239 +1,247 @@
 <?php
 
 return [
 
     /*
     |--------------------------------------------------------------------------
     | Application Name
     |--------------------------------------------------------------------------
     |
     | This value is the name of your application. This value is used when the
     | framework needs to place the application's name in a notification or
     | any other location as required by the application or its packages.
     |
     */
 
     'name' => env('APP_NAME', 'Laravel'),
 
     /*
     |--------------------------------------------------------------------------
     | Application Environment
     |--------------------------------------------------------------------------
     |
     | This value determines the "environment" your application is currently
     | running in. This may determine how you prefer to configure various
     | services the application utilizes. Set this in your ".env" file.
     |
     */
 
     'env' => env('APP_ENV', 'production'),
 
     /*
     |--------------------------------------------------------------------------
     | Application Debug Mode
     |--------------------------------------------------------------------------
     |
     | When your application is in debug mode, detailed error messages with
     | stack traces will be shown on every error that occurs within your
     | application. If disabled, a simple generic error page is shown.
     |
     */
 
     'debug' => env('APP_DEBUG', false),
 
     /*
     |--------------------------------------------------------------------------
     | Application URL
     |--------------------------------------------------------------------------
     |
     | This URL is used by the console to properly generate URLs when using
     | the Artisan command line tool. You should set this to the root of
     | your application so that it is used when running Artisan tasks.
     */
 
     'url' => env('APP_URL', 'http://localhost'),
 
     'public_url' => env('APP_PUBLIC_URL', env('APP_URL', 'http://localhost')),
 
     'asset_url' => env('ASSET_URL', null),
 
     /*
     |--------------------------------------------------------------------------
     | Application Domain
     |--------------------------------------------------------------------------
     |
     | System domain used for user signup (kolab identity)
     */
     'domain' => env('APP_DOMAIN', 'domain.tld'),
 
     /*
     |--------------------------------------------------------------------------
     | Application Timezone
     |--------------------------------------------------------------------------
     |
     | Here you may specify the default timezone for your application, which
     | will be used by the PHP date and date-time functions. We have gone
     | ahead and set this to a sensible default for you out of the box.
     |
     */
 
     'timezone' => 'UTC',
 
     /*
     |--------------------------------------------------------------------------
     | Application Locale Configuration
     |--------------------------------------------------------------------------
     |
     | The application locale determines the default locale that will be used
     | by the translation service provider. You are free to set this value
     | to any of the locales which will be supported by the application.
     |
     */
 
     'locale' => 'en',
 
     /*
     |--------------------------------------------------------------------------
     | Application Fallback Locale
     |--------------------------------------------------------------------------
     |
     | The fallback locale determines the locale to use when the current one
     | is not available. You may change the value to correspond to any of
     | the language folders that are provided through your application.
     |
     */
 
     'fallback_locale' => 'en',
 
     /*
     |--------------------------------------------------------------------------
     | Faker Locale
     |--------------------------------------------------------------------------
     |
     | This locale will be used by the Faker PHP library when generating fake
     | data for your database seeds. For example, this will be used to get
     | localized telephone numbers, street address information and more.
     |
     */
 
     'faker_locale' => 'en_US',
 
     /*
     |--------------------------------------------------------------------------
     | Encryption Key
     |--------------------------------------------------------------------------
     |
     | This key is used by the Illuminate encrypter service and should be set
     | to a random, 32 character string, otherwise these encrypted strings
     | will not be safe. Please do this before deploying an application!
     |
     */
 
     'key' => env('APP_KEY'),
 
     'cipher' => 'AES-256-CBC',
 
     /*
     |--------------------------------------------------------------------------
     | Autoloaded Service Providers
     |--------------------------------------------------------------------------
     |
     | The service providers listed here will be automatically loaded on the
     | request to your application. Feel free to add your own services to
     | this array to grant expanded functionality to your applications.
     |
     */
 
     'providers' => [
 
         /*
          * Laravel Framework Service Providers...
          */
         Illuminate\Auth\AuthServiceProvider::class,
         Illuminate\Broadcasting\BroadcastServiceProvider::class,
         Illuminate\Bus\BusServiceProvider::class,
         Illuminate\Cache\CacheServiceProvider::class,
         Illuminate\Foundation\Providers\ConsoleSupportServiceProvider::class,
         Illuminate\Cookie\CookieServiceProvider::class,
         Illuminate\Database\DatabaseServiceProvider::class,
         Illuminate\Encryption\EncryptionServiceProvider::class,
         Illuminate\Filesystem\FilesystemServiceProvider::class,
         Illuminate\Foundation\Providers\FoundationServiceProvider::class,
         Illuminate\Hashing\HashServiceProvider::class,
         Illuminate\Mail\MailServiceProvider::class,
         Illuminate\Notifications\NotificationServiceProvider::class,
         Illuminate\Pagination\PaginationServiceProvider::class,
         Illuminate\Pipeline\PipelineServiceProvider::class,
         Illuminate\Queue\QueueServiceProvider::class,
         Illuminate\Redis\RedisServiceProvider::class,
         Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
         Illuminate\Session\SessionServiceProvider::class,
         Illuminate\Translation\TranslationServiceProvider::class,
         Illuminate\Validation\ValidationServiceProvider::class,
         Illuminate\View\ViewServiceProvider::class,
 
         /*
          * Package Service Providers...
          */
 
         /*
          * Application Service Providers...
          */
         App\Providers\AppServiceProvider::class,
         App\Providers\AuthServiceProvider::class,
         // App\Providers\BroadcastServiceProvider::class,
         App\Providers\EventServiceProvider::class,
         App\Providers\RouteServiceProvider::class,
     ],
 
     /*
     |--------------------------------------------------------------------------
     | Class Aliases
     |--------------------------------------------------------------------------
     |
     | This array of class aliases will be registered when this application
     | is started. However, feel free to register as many as you wish as
     | the aliases are "lazy" loaded so they don't hinder performance.
     |
     */
 
     'aliases' => [
 
         'App' => Illuminate\Support\Facades\App::class,
         'Arr' => Illuminate\Support\Arr::class,
         'Artisan' => Illuminate\Support\Facades\Artisan::class,
         'Auth' => Illuminate\Support\Facades\Auth::class,
         'Blade' => Illuminate\Support\Facades\Blade::class,
         'Broadcast' => Illuminate\Support\Facades\Broadcast::class,
         'Bus' => Illuminate\Support\Facades\Bus::class,
         'Cache' => Illuminate\Support\Facades\Cache::class,
         'Config' => Illuminate\Support\Facades\Config::class,
         'Cookie' => Illuminate\Support\Facades\Cookie::class,
         'Crypt' => Illuminate\Support\Facades\Crypt::class,
         'DB' => Illuminate\Support\Facades\DB::class,
         'Eloquent' => Illuminate\Database\Eloquent\Model::class,
         'Event' => Illuminate\Support\Facades\Event::class,
         'File' => Illuminate\Support\Facades\File::class,
         'Gate' => Illuminate\Support\Facades\Gate::class,
         'Hash' => Illuminate\Support\Facades\Hash::class,
         'Lang' => Illuminate\Support\Facades\Lang::class,
         'Log' => Illuminate\Support\Facades\Log::class,
         'Mail' => Illuminate\Support\Facades\Mail::class,
         'Notification' => Illuminate\Support\Facades\Notification::class,
         'Password' => Illuminate\Support\Facades\Password::class,
         'Queue' => Illuminate\Support\Facades\Queue::class,
         'Redirect' => Illuminate\Support\Facades\Redirect::class,
         'Redis' => Illuminate\Support\Facades\Redis::class,
         'Request' => Illuminate\Support\Facades\Request::class,
         'Response' => Illuminate\Support\Facades\Response::class,
         'Route' => Illuminate\Support\Facades\Route::class,
         'Schema' => Illuminate\Support\Facades\Schema::class,
         'Session' => Illuminate\Support\Facades\Session::class,
         'Storage' => Illuminate\Support\Facades\Storage::class,
         'Str' => Illuminate\Support\Str::class,
         'URL' => Illuminate\Support\Facades\URL::class,
         'Validator' => Illuminate\Support\Facades\Validator::class,
         'View' => Illuminate\Support\Facades\View::class,
 
     ],
+
+    // Locations of knowledge base articles
+    'kb' => [
+        // An article about suspended accounts
+        'account_suspended' => env('KB_ACCOUNT_SUSPENDED'),
+        // An article about a way to delete an owned account
+        'account_delete' => env('KB_ACCOUNT_DELETE'),
+    ],
 ];
diff --git a/src/resources/lang/en/mail.php b/src/resources/lang/en/mail.php
index 5b5b3f97..732dc4ac 100644
--- a/src/resources/lang/en/mail.php
+++ b/src/resources/lang/en/mail.php
@@ -1,25 +1,42 @@
 <?php
 
 return [
 
     /*
     |--------------------------------------------------------------------------
     | Mail Language Lines
     |--------------------------------------------------------------------------
     |
     | The following language lines are used in mail/sms messages sent by the app.
     */
 
     'header' => "Dear :name,",
     'footer' => "Best regards,\nYour :site Team",
 
+    '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.\n\n"
+        . "Settle up to keep your account running.",
+
     'passwordreset-subject' => ":site Password Reset",
     'passwordreset-body' => "Someone recently asked to change your :site password.\n"
         . "If this was you, use this verification code to complete the process: :code.\n"
         . "You can also click the link below.\n"
         . "If you did not make such a request, you can either ignore this message or get in touch with us about this incident.",
 
     'signupcode-subject' => ":site Registration",
     'signupcode-body' => "This is your verification code for the :site registration process: :code.\n"
         . "You can also click the link below to continue the registration process:",
+
+    'suspendeddebtor-subject' => ":site Account Suspended",
+    'suspendeddebtor-body' => "You have been behind on paying for your :site account "
+        ."for over :days days. Your account has been suspended.",
+    'suspendeddebtor-middle' => "Settle up now to reactivate your account.",
+    'suspendeddebtor-cancel' => "Don't want to be our customer anymore? "
+        . "Here is how you can cancel your account:",
+
+    'support' => "Special circumstances? Something wrong with a charge?\n"
+        . " :site Support is here to help:",
+
+    'more-info-html' => "See <a href=\":href\">here</a> for more information.",
 ];
diff --git a/src/resources/views/emails/negative_balance.blade.php b/src/resources/views/emails/negative_balance.blade.php
new file mode 100644
index 00000000..1294aa9e
--- /dev/null
+++ b/src/resources/views/emails/negative_balance.blade.php
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
+    <head>
+        <meta charset="utf-8">
+    </head>
+    <body>
+        <p>{{ __('mail.header', ['name' => $username]) }}</p>
+
+        <p>{{ __('mail.negativebalance-body', ['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.footer', ['site' => $site, 'appurl' => config('app.url')]) }}</p>
+    </body>
+</html>
diff --git a/src/resources/views/emails/suspended_debtor.blade.php b/src/resources/views/emails/suspended_debtor.blade.php
new file mode 100644
index 00000000..ead7fc12
--- /dev/null
+++ b/src/resources/views/emails/suspended_debtor.blade.php
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
+    <head>
+        <meta charset="utf-8">
+    </head>
+    <body>
+        <p>{{ __('mail.header', ['name' => $username]) }}</p>
+
+        <p>{{ __('mail.suspendeddebtor-body', ['site' => $site, 'days' => $days]) }} {!! $moreInfo !!}</p>
+        <p>{{ __('mail.suspendeddebtor-middle') }}</p>
+        <p><a href="{{ $walletUrl }}">{{ $walletUrl }}</a></p>
+
+@if ($supportUrl)
+        <p>{{ __('mail.support', ['site' => $site]) }}</p>
+        <p><a href="{{ $supportUrl }}">{{ $supportUrl }}</a></p>
+@endif
+@if ($cancelUrl)
+        <p>{{ __('mail.suspendeddebtor-cancel') }}</p>
+        <p><a href="{{ $cancelUrl }}">{{ $cancelUrl }}</a></p>
+@endif
+
+        <p>{{ __('mail.footer', ['site' => $site, 'appurl' => config('app.url')]) }}</p>
+    </body>
+</html>
diff --git a/src/tests/Unit/Mail/NegativeBalanceTest.php b/src/tests/Unit/Mail/NegativeBalanceTest.php
new file mode 100644
index 00000000..1e173a29
--- /dev/null
+++ b/src/tests/Unit/Mail/NegativeBalanceTest.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\NegativeBalance;
+use App\User;
+use Tests\TestCase;
+
+class NegativeBalanceTest extends TestCase
+{
+    /**
+     * Test email content
+     *
+     * @return void
+     */
+    public function testBuild()
+    {
+        $user = new User();
+
+        \config([
+                'app.support_url' => 'https://kolab.org/support',
+        ]);
+
+        $mail = new NegativeBalance($user);
+        $html = $mail->build()->render();
+
+        $walletUrl = \App\Utils::serviceUrl('/wallet');
+        $walletLink = sprintf('<a href="%s">%s</a>', $walletUrl, $walletUrl);
+        $supportUrl = \config('app.support_url');
+        $supportLink = sprintf('<a href="%s">%s</a>', $supportUrl, $supportUrl);
+
+        $appName = \config('app.name');
+
+        $this->assertSame("$appName Payment Reminder", $mail->subject);
+        $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, "$appName Support") > 0);
+        $this->assertTrue(strpos($html, "$appName Team") > 0);
+    }
+}
diff --git a/src/tests/Unit/Mail/SuspendedDebtorTest.php b/src/tests/Unit/Mail/SuspendedDebtorTest.php
new file mode 100644
index 00000000..a823bd71
--- /dev/null
+++ b/src/tests/Unit/Mail/SuspendedDebtorTest.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace Tests\Unit\Mail;
+
+use App\Mail\SuspendedDebtor;
+use App\User;
+use Tests\TestCase;
+
+class SuspendedDebtorTest extends TestCase
+{
+    /**
+     * Test email content
+     *
+     * @return void
+     */
+    public function testBuild()
+    {
+        $user = new User();
+
+        \config([
+                'app.support_url' => 'https://kolab.org/support',
+                'app.kb.account_suspended' => 'https://kb.kolab.org/account-suspended',
+                'app.kb.account_delete' => 'https://kb.kolab.org/account-delete',
+        ]);
+
+        $mail = new SuspendedDebtor($user);
+        $html = $mail->build()->render();
+
+        $walletUrl = \App\Utils::serviceUrl('/wallet');
+        $walletLink = sprintf('<a href="%s">%s</a>', $walletUrl, $walletUrl);
+        $supportUrl = \config('app.support_url');
+        $supportLink = sprintf('<a href="%s">%s</a>', $supportUrl, $supportUrl);
+        $deleteUrl = \config('app.kb.account_delete');
+        $deleteLink = sprintf('<a href="%s">%s</a>', $deleteUrl, $deleteUrl);
+        $moreUrl = \config('app.kb.account_suspended');
+        $moreLink = sprintf('<a href="%s">here</a>', $moreUrl);
+
+        $appName = \config('app.name');
+
+        $this->assertSame("$appName Account Suspended", $mail->subject);
+        $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, $deleteLink) > 0);
+        $this->assertTrue(strpos($html, "You have been behind on paying for your $appName account") > 0);
+        $this->assertTrue(strpos($html, "over 14 days") > 0);
+        $this->assertTrue(strpos($html, "See $moreLink for more information") > 0);
+        $this->assertTrue(strpos($html, "$appName Support") > 0);
+        $this->assertTrue(strpos($html, "$appName Team") > 0);
+    }
+}