diff --git a/config/config.default.php b/config/config.default.php
index 56ac6e6a..4207754b 100644
--- a/config/config.default.php
+++ b/config/config.default.php
@@ -17,6 +17,9 @@ return [
     // Enable maintenance mode (show a static page)
     'maintenance'             => (bool)env('MAINTENANCE', false),
 
+    // Application name (not the event name!)
+    'app_name'                => env('APP_NAME', 'Engelsystem'),
+
     // Set to development to enable debugging messages
     'environment'             => env('ENVIRONMENT', 'production'),
 
@@ -36,7 +39,7 @@ return [
         'from'   => [
             // From address of all emails
             'address' => env('MAIL_FROM_ADDRESS', 'noreply@engelsystem.de'),
-            'name'    => env('MAIL_FROM_NAME', 'Engelsystem')
+            'name'    => env('MAIL_FROM_NAME', env('APP_NAME', 'Engelsystem'))
         ],
 
         'host'       => env('MAIL_HOST', 'localhost'),
diff --git a/includes/engelsystem.php b/includes/engelsystem.php
index a5dee186..caebe09b 100644
--- a/includes/engelsystem.php
+++ b/includes/engelsystem.php
@@ -16,7 +16,9 @@ require __DIR__ . '/includes.php';
  * Check for maintenance
  */
 if ($app->get('config')->get('maintenance')) {
-    echo file_get_contents(__DIR__ . '/../resources/views/layouts/maintenance.html');
+    $maintenance = file_get_contents(__DIR__ . '/../resources/views/layouts/maintenance.html');
+    $maintenance = str_replace('%APP_NAME%', $app->get('config')->get('app_name'), $maintenance);
+    echo $maintenance;
     die();
 }
 
diff --git a/includes/mailer/shifts_mailer.php b/includes/mailer/shifts_mailer.php
index 4dd430d3..0c4e381c 100644
--- a/includes/mailer/shifts_mailer.php
+++ b/includes/mailer/shifts_mailer.php
@@ -65,7 +65,7 @@ function mail_shift_change($old_shift, $new_shift)
         if ($user['email_shiftinfo']) {
             engelsystem_email_to_user(
                 $user,
-                '[engelsystem] ' . __('Your Shift has changed'),
+                __('Your Shift has changed'),
                 $message,
                 true
             );
@@ -90,7 +90,7 @@ function mail_shift_delete($shift)
 
     foreach ($users as $user) {
         if ($user['email_shiftinfo']) {
-            engelsystem_email_to_user($user, '[engelsystem] ' . __('Your Shift was deleted'), $message, true);
+            engelsystem_email_to_user($user, __('Your Shift was deleted'), $message, true);
         }
     }
 }
@@ -113,7 +113,7 @@ function mail_shift_assign($user, $shift)
     $message .= date('Y-m-d H:i', $shift['start']) . ' - ' . date('H:i', $shift['end']) . "\n";
     $message .= $room['Name'] . "\n";
 
-    engelsystem_email_to_user($user, '[engelsystem] ' . __('Assigned to Shift'), $message, true);
+    engelsystem_email_to_user($user, __('Assigned to Shift'), $message, true);
 }
 
 /**
@@ -134,5 +134,5 @@ function mail_shift_removed($user, $shift)
     $message .= date('Y-m-d H:i', $shift['start']) . ' - ' . date('H:i', $shift['end']) . "\n";
     $message .= $room['Name'] . "\n";
 
-    engelsystem_email_to_user($user, '[engelsystem] ' . __('Removed from Shift'), $message, true);
+    engelsystem_email_to_user($user, __('Removed from Shift'), $message, true);
 }
diff --git a/includes/mailer/users_mailer.php b/includes/mailer/users_mailer.php
index 5f1e6e79..23a13806 100644
--- a/includes/mailer/users_mailer.php
+++ b/includes/mailer/users_mailer.php
@@ -8,7 +8,10 @@ function mail_user_delete($user)
 {
     return engelsystem_email_to_user(
         $user,
-        '[engelsystem] ' . __('Your account has been deleted'),
-        __('Your angelsystem account has been deleted. If you have any questions regarding your account deletion, please contact heaven.')
+        __('Your account has been deleted'),
+        __(
+            'Your %s account has been deleted. If you have any questions regarding your account deletion, please contact heaven.',
+            [config('app_name')]
+        )
     );
 }
diff --git a/includes/pages/guest_login.php b/includes/pages/guest_login.php
index 797aaea7..95e63bbc 100644
--- a/includes/pages/guest_login.php
+++ b/includes/pages/guest_login.php
@@ -309,7 +309,10 @@ function guest_register()
                             form_email('mail', __('E-Mail') . ' ' . entry_required(), $mail),
                             form_checkbox(
                                 'email_shiftinfo',
-                                __('The engelsystem is allowed to send me an email (e.g. when my shifts change)'),
+                                __(
+                                    'The %s is allowed to send me an email (e.g. when my shifts change)',
+                                    [config('app_name')]
+                                ),
                                 $email_shiftinfo
                             ),
                             form_checkbox(
diff --git a/includes/pages/user_atom.php b/includes/pages/user_atom.php
index 9934fb92..f6a67a15 100644
--- a/includes/pages/user_atom.php
+++ b/includes/pages/user_atom.php
@@ -47,7 +47,7 @@ function make_atom_entries_from_news($news_entries)
     $request = app('request');
     $html = '<?xml version="1.0" encoding="utf-8"?>
   <feed xmlns="http://www.w3.org/2005/Atom">
-  <title>Engelsystem</title>
+  <title>' . config('app_name') . '</title>
   <id>' . $request->getHttpHost()
         . htmlspecialchars(preg_replace(
             '#[&?]key=[a-f\d]{32}#',
diff --git a/includes/pages/user_ical.php b/includes/pages/user_ical.php
index 3430c3b3..f7ed64dd 100644
--- a/includes/pages/user_ical.php
+++ b/includes/pages/user_ical.php
@@ -36,7 +36,7 @@ function send_ical_from_shifts($shifts)
 {
     header('Content-Type: text/calendar; charset=utf-8');
     header('Content-Disposition: attachment; filename=shifts.ics');
-    $output = "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//-//Engelsystem//DE\r\nCALSCALE:GREGORIAN\r\n";
+    $output = "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//-//" . config('app_name') . "//DE\r\nCALSCALE:GREGORIAN\r\n";
     foreach ($shifts as $shift) {
         $output .= make_ical_entry_from_shift($shift);
     }
diff --git a/includes/view/EventConfig_view.php b/includes/view/EventConfig_view.php
index cd657c67..730593b1 100644
--- a/includes/view/EventConfig_view.php
+++ b/includes/view/EventConfig_view.php
@@ -1,6 +1,7 @@
 <?php
 
 use Carbon\Carbon;
+use Illuminate\Support\Str;
 
 /**
  * Shows basic event infos and countdowns.
@@ -24,7 +25,7 @@ function EventConfig_countdown_page()
     $elements[] = div('col-sm-12 text-center', [
         heading(sprintf(
             __('Welcome to the %s!'),
-            $name . ' <span class="icon-icon_angel"></span> ENGELSYSTEM'
+            $name . ' <span class="icon-icon_angel"></span> ' . Str::upper(config('app_name'))
         ), 2)
     ]);
 
diff --git a/includes/view/User_view.php b/includes/view/User_view.php
index ddf49885..fb541619 100644
--- a/includes/view/User_view.php
+++ b/includes/view/User_view.php
@@ -54,7 +54,10 @@ function User_settings_view(
                     form_text('mail', __('E-Mail') . ' ' . entry_required(), $user_source['email']),
                     form_checkbox(
                         'email_shiftinfo',
-                        __('The engelsystem is allowed to send me an email (e.g. when my shifts change)'),
+                        __(
+                            'The %s is allowed to send me an email (e.g. when my shifts change)',
+                            [config('app_name')]
+                        ),
                         $user_source['email_shiftinfo']
                     ),
                     form_checkbox(
diff --git a/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.mo b/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.mo
index 4909145a..a1765a6b 100644
Binary files a/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.mo and b/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.mo differ
diff --git a/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.po b/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.po
index 54e819c8..263d1641 100644
--- a/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.po
+++ b/resources/lang/de_DE.UTF-8/LC_MESSAGES/default.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Engelsystem 2.0\n"
 "POT-Creation-Date: 2017-12-29 19:01+0100\n"
-"PO-Revision-Date: 2018-09-17 12:10+0200\n"
+"PO-Revision-Date: 2018-10-05 15:35+0200\n"
 "Last-Translator: msquare <msquare@notrademark.de>\n"
 "Language-Team: \n"
 "Language: de_DE\n"
@@ -669,16 +669,18 @@ msgid "Hi %s,"
 msgstr "Hallo %s,"
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/helper/email_helper.php:21
-msgid "here is a message for you from the engelsystem:"
-msgstr "hier ist eine Nachricht aus dem Engelsystem für Dich:"
+#, php-format
+msgid "here is a message for you from the %s:"
+msgstr "hier ist eine Nachricht aus dem %s für Dich:"
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/helper/email_helper.php:23
+#, php-format
 msgid ""
 "This email is autogenerated and has not been signed. You got this email "
-"because you are registered in the engelsystem."
+"because you are registered in the %s."
 msgstr ""
 "Diese E-Mail wurde automatisch generiert und muss daher nicht unterschrieben "
-"werden. Du hast diese E-Mail bekommen, weil Du im Engelsystem registriert "
+"werden. Du hast diese E-Mail bekommen, weil Du im %s registriert "
 "bist."
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/mailer/shifts_mailer.php:15
@@ -747,11 +749,12 @@ msgid "Your account has been deleted"
 msgstr "Dein Konto wurde gelöscht."
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/mailer/users_mailer.php:12
+#, php-format
 msgid ""
-"Your angelsystem account has been deleted. If you have any questions "
+"Your %s account has been deleted. If you have any questions "
 "regarding your account deletion, please contact heaven."
 msgstr ""
-"Dein Engelsystem-Konto wurde gelöscht. Wenn Du dazu Fragen hast, kontaktiere "
+"Dein %s-Konto wurde gelöscht. Wenn Du dazu Fragen hast, kontaktiere "
 "bitte den Himmel."
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/pages/admin_active.php:10
@@ -1591,10 +1594,11 @@ msgstr ""
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/pages/guest_login.php:316
 #: /Users/msquare/workspace/projects/engelsystem/includes/view/User_view.php:55
+#, php-format
 msgid ""
-"The engelsystem is allowed to send me an email (e.g. when my shifts change)"
+"The %s is allowed to send me an email (e.g. when my shifts change)"
 msgstr ""
-"Das Engelsystem darf mir E-Mails senden (z.B. wenn sich meine Schichten "
+"Das %s darf mir E-Mails senden (z.B. wenn sich meine Schichten "
 "ändern)"
 
 #: /Users/msquare/workspace/projects/engelsystem/includes/pages/guest_login.php:321
diff --git a/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.mo b/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.mo
index 5ad48984..95251feb 100644
Binary files a/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.mo and b/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.mo differ
diff --git a/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.po b/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.po
index 19b08ad7..e7307e5d 100644
--- a/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.po
+++ b/resources/lang/pt_BR.UTF.8/LC_MESSAGES/pt_BR.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Engelsystem 2.0\n"
 "POT-Creation-Date: 2017-04-25 05:23+0200\n"
-"PO-Revision-Date: 2018-09-17 12:11+0200\n"
+"PO-Revision-Date: 2018-10-05 15:35+0200\n"
 "Last-Translator: samba <samba@autistici.org>\n"
 "Language-Team: \n"
 "Language: pt_BR\n"
@@ -560,14 +560,16 @@ msgid "Hi %s,"
 msgstr "Oi %s,"
 
 #: includes/helper/email_helper.php:12
-msgid "here is a message for you from the engelsystem:"
-msgstr "aqui está uma mensagem do engelsystem para você:"
+#, php-format
+msgid "here is a message for you from the %s:"
+msgstr "aqui está uma mensagem do %s para você:"
 
 #: includes/helper/email_helper.php:12
+#, php-format
 msgid ""
 "This email is autogenerated and has not been signed. You got this email "
-"because you are registered in the engelsystem."
-msgstr "Você recebeu esse email porque está registrado no engelsystem."
+"because you are registered in the %s."
+msgstr "Você recebeu esse email porque está registrado no %s."
 
 #: includes/mailer/shifts_mailer.php:10
 msgid "A Shift you are registered on has changed:"
@@ -1344,10 +1346,11 @@ msgstr ""
 "Esse script criará uma conta no sistema."
 
 #: includes/pages/guest_login.php:229 includes/view/User_view.php:50
+#, php-format
 msgid ""
-"The engelsystem is allowed to send me an email (e.g. when my shifts change)"
+"The %s is allowed to send me an email (e.g. when my shifts change)"
 msgstr ""
-"Permito que o engelsystem me envie emails (por exemplo, quando meus turnos "
+"Permito que o %s me envie emails (por exemplo, quando meus turnos "
 "mudam)"
 
 #: includes/pages/guest_login.php:230 includes/view/User_view.php:51
diff --git a/resources/views/emails/mail.twig b/resources/views/emails/mail.twig
index f5ac5860..c99fc104 100644
--- a/resources/views/emails/mail.twig
+++ b/resources/views/emails/mail.twig
@@ -1,6 +1,6 @@
 {{ __('Hi %s,', [user]) }}
 
-{{ __('here is a message for you from the engelsystem:') }}
+{{ __('here is a message for you from the %s:', [config('app_name')]) }}
 {{ message|raw }}
 
-{{ __('This email is autogenerated and has not been signed. You got this email because you are registered in the engelsystem.') }}
+{{ __('This email is autogenerated and has not been signed. You got this email because you are registered in the %s.', [config('app_name')]) }}
diff --git a/resources/views/layouts/app.twig b/resources/views/layouts/app.twig
index d8f8d10f..ed0d96af 100644
--- a/resources/views/layouts/app.twig
+++ b/resources/views/layouts/app.twig
@@ -3,7 +3,7 @@
 <html lang="{{ session_get('locale')|split('_')[0]|escape('html_attr') }}">
 <head>
     {% block head %}
-        <title>{% block title %}{{ title }}{% endblock %} - Engelsystem</title>
+        <title>{% block title %}{{ title }}{% endblock %} - {{ config('app_name') }}</title>
 
         <meta charset="UTF-8"/>
         <meta name="viewport" content="width=device-width, initial-scale=1">
diff --git a/resources/views/layouts/maintenance.html b/resources/views/layouts/maintenance.html
index f7ab5772..85b95168 100644
--- a/resources/views/layouts/maintenance.html
+++ b/resources/views/layouts/maintenance.html
@@ -1,7 +1,7 @@
 <!DOCTYPE html>
 <html>
 <head>
-    <title>Maintenance - Engelsystem</title>
+    <title>Maintenance - %APP_NAME%</title>
     <meta charset="UTF-8"/>
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <link rel="stylesheet" type="text/css" href="assets/theme0.css"/>
@@ -19,7 +19,7 @@
                 <span class="icon-bar"></span>
             </button>
             <a class="navbar-brand" href="#">
-                <span class="icon-icon_angel"></span> <strong class="visible-lg-inline">ENGELSYSTEM</strong>
+                <span class="icon-icon_angel"></span> <strong class="visible-lg-inline">%APP_NAME%</strong>
             </a>
         </div>
         <div class="collapse navbar-collapse" id="navbar-collapse-1">
@@ -40,7 +40,7 @@
                 </h1>
                 <div class="col-md-6">
                     <h2>
-                        The <span class="icon-icon_angel"></span> <strong>ENGELSYSTEM</strong> is in maintenance mode.
+                        The <span class="icon-icon_angel"></span> <strong>%APP_NAME%</strong> is in maintenance mode.
                     </h2>
                     <p>This may be due to...</p>
                     <p>
diff --git a/resources/views/layouts/parts/navbar.twig b/resources/views/layouts/parts/navbar.twig
index 94df9013..22797a7a 100644
--- a/resources/views/layouts/parts/navbar.twig
+++ b/resources/views/layouts/parts/navbar.twig
@@ -21,7 +21,7 @@
                     <span class="icon-bar"></span>
                 </button>
                 <a class="navbar-brand" href="{{ url('/') }}">
-                    <span class="icon-icon_angel"></span> <strong class="visible-lg-inline">ENGELSYSTEM</strong>
+                    <span class="icon-icon_angel"></span> <strong class="visible-lg-inline">{{ config('app_name')|upper }}</strong>
                 </a>
             </div>
 
diff --git a/src/Mail/EngelsystemMailer.php b/src/Mail/EngelsystemMailer.php
index 17047cc8..81660681 100644
--- a/src/Mail/EngelsystemMailer.php
+++ b/src/Mail/EngelsystemMailer.php
@@ -10,6 +10,13 @@ class EngelsystemMailer extends Mailer
     /** @var Renderer|null */
     protected $view;
 
+    /** @var string */
+    protected $subjectPrefix = null;
+
+    /**
+     * @param SwiftMailer $mailer
+     * @param Renderer    $view
+     */
     public function __construct(SwiftMailer $mailer, Renderer $view = null)
     {
         parent::__construct($mailer);
@@ -32,4 +39,37 @@ class EngelsystemMailer extends Mailer
 
         return $this->send($to, $subject, $body);
     }
+
+    /**
+     * Send the mail
+     *
+     * @param string|string[] $to
+     * @param string          $subject
+     * @param string          $body
+     * @return int
+     */
+    public function send($to, string $subject, string $body): int
+    {
+        if ($this->subjectPrefix) {
+            $subject = sprintf('[%s] %s', $this->subjectPrefix, $subject);
+        }
+
+        return parent::send($to, $subject, $body);
+    }
+
+    /**
+     * @return string
+     */
+    public function getSubjectPrefix(): string
+    {
+        return $this->subjectPrefix;
+    }
+
+    /**
+     * @param string $subjectPrefix
+     */
+    public function setSubjectPrefix(string $subjectPrefix)
+    {
+        $this->subjectPrefix = $subjectPrefix;
+    }
 }
diff --git a/src/Mail/MailerServiceProvider.php b/src/Mail/MailerServiceProvider.php
index 989fee8f..70725afd 100644
--- a/src/Mail/MailerServiceProvider.php
+++ b/src/Mail/MailerServiceProvider.php
@@ -28,9 +28,10 @@ class MailerServiceProvider extends ServiceProvider
         $this->app->instance(SwiftMailer::class, $swiftMailer);
         $this->app->instance('mailer.swift', $swiftMailer);
 
-        /** @var Mailer $mailer */
+        /** @var EngelsystemMailer $mailer */
         $mailer = $this->app->make(EngelsystemMailer::class);
         $mailer->setFromAddress($mailConfig['from']['address']);
+        $mailer->setSubjectPrefix($config->get('app_name'));
         if (!empty($mailConfig['from']['name'])) {
             $mailer->setFromName($mailConfig['from']['name']);
         }
diff --git a/tests/Unit/Mail/EngelsystemMailerTest.php b/tests/Unit/Mail/EngelsystemMailerTest.php
index aae6e267..0f60ff3b 100644
--- a/tests/Unit/Mail/EngelsystemMailerTest.php
+++ b/tests/Unit/Mail/EngelsystemMailerTest.php
@@ -7,6 +7,7 @@ use Engelsystem\Renderer\Renderer;
 use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 use Swift_Mailer as SwiftMailer;
+use Swift_Message as SwiftMessage;
 
 class EngelsystemMailerTest extends TestCase
 {
@@ -37,4 +38,53 @@ class EngelsystemMailerTest extends TestCase
         $return = $mailer->sendView('foo@bar.baz', 'Lorem dolor', 'test/template.tpl', ['dev' => true]);
         $this->equalTo(1, $return);
     }
+
+    /**
+     * @covers \Engelsystem\Mail\EngelsystemMailer::send
+     * @covers \Engelsystem\Mail\EngelsystemMailer::setSubjectPrefix
+     * @covers \Engelsystem\Mail\EngelsystemMailer::getSubjectPrefix
+     */
+    public function testSend()
+    {
+        /** @var SwiftMessage|MockObject $message */
+        $message = $this->createMock(SwiftMessage::class);
+        /** @var SwiftMailer|MockObject $swiftMailer */
+        $swiftMailer = $this->createMock(SwiftMailer::class);
+        $swiftMailer->expects($this->once())
+            ->method('createMessage')
+            ->willReturn($message);
+        $swiftMailer->expects($this->once())
+            ->method('send')
+            ->willReturn(1);
+
+        $message->expects($this->once())
+            ->method('setTo')
+            ->with(['to@xam.pel'])
+            ->willReturn($message);
+
+        $message->expects($this->once())
+            ->method('setFrom')
+            ->with('foo@bar.baz', 'Lorem Ipsum')
+            ->willReturn($message);
+
+        $message->expects($this->once())
+            ->method('setSubject')
+            ->with('[Mail test] Foo Bar')
+            ->willReturn($message);
+
+        $message->expects($this->once())
+            ->method('setBody')
+            ->with('Lorem Ipsum!')
+            ->willReturn($message);
+
+        $mailer = new EngelsystemMailer($swiftMailer);
+        $mailer->setFromAddress('foo@bar.baz');
+        $mailer->setFromName('Lorem Ipsum');
+        $mailer->setSubjectPrefix('Mail test');
+
+        $this->assertEquals('Mail test', $mailer->getSubjectPrefix());
+
+        $return = $mailer->send('to@xam.pel', 'Foo Bar', 'Lorem Ipsum!');
+        $this->equalTo(1, $return);
+    }
 }
diff --git a/tests/Unit/Mail/MailerServiceProviderTest.php b/tests/Unit/Mail/MailerServiceProviderTest.php
index 0c841e9e..793cd1f2 100644
--- a/tests/Unit/Mail/MailerServiceProviderTest.php
+++ b/tests/Unit/Mail/MailerServiceProviderTest.php
@@ -20,7 +20,8 @@ class MailerServiceProviderTest extends ServiceProviderTest
 {
     /** @var array */
     protected $defaultConfig = [
-        'email' => [
+        'app_name' => 'Engelsystem App',
+        'email'    => [
             'driver'   => 'mail',
             'from'     => [
                 'name'    => 'Engelsystem',
@@ -58,6 +59,7 @@ class MailerServiceProviderTest extends ServiceProviderTest
 
         /** @var EngelsystemMailer $mailer */
         $mailer = $app->get('mailer');
+        $this->assertEquals('Engelsystem App', $mailer->getSubjectPrefix());
         $this->assertEquals('Engelsystem', $mailer->getFromName());
         $this->assertEquals('foo@bar.batz', $mailer->getFromAddress());