diff --git a/src/tests/Feature/Controller/NGINXTest.php b/src/tests/Feature/Controller/NGINXTest.php
index f00c5927..10f20ff0 100644
--- a/src/tests/Feature/Controller/NGINXTest.php
+++ b/src/tests/Feature/Controller/NGINXTest.php
@@ -1,292 +1,292 @@
 <?php
 
 namespace Tests\Feature\Controller;
 
 use Tests\TestCase;
 
 class NGINXTest extends TestCase
 {
     /**
      * {@inheritDoc}
      */
     public function setUp(): void
     {
         parent::setUp();
 
         $john = $this->getTestUser('john@kolab.org');
         \App\CompanionApp::where('user_id', $john->id)->delete();
         \App\AuthAttempt::where('user_id', $john->id)->delete();
         $john->setSettings([
                 'limit_geo' => null,
                 'guam_enabled' => null,
         ]);
         \App\IP4Net::where('net_number', inet_pton('127.0.0.0'))->delete();
 
         $this->useServicesUrl();
     }
 
     /**
      * {@inheritDoc}
      */
     public function tearDown(): void
     {
         $john = $this->getTestUser('john@kolab.org');
         \App\CompanionApp::where('user_id', $john->id)->delete();
         \App\AuthAttempt::where('user_id', $john->id)->delete();
         $john->setSettings([
                 'limit_geo' => null,
                 'guam_enabled' => null,
         ]);
         \App\IP4Net::where('net_number', inet_pton('127.0.0.0'))->delete();
 
         parent::tearDown();
     }
 
     /**
      * Test the webhook
      */
     public function testNGINXWebhook(): void
     {
         $john = $this->getTestUser('john@kolab.org');
 
         $response = $this->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         $pass = \App\Utils::generatePassphrase();
         $headers = [
             'Auth-Login-Attempt' => '1',
             'Auth-Method' => 'plain',
             'Auth-Pass' => $pass,
             'Auth-Protocol' => 'imap',
             'Auth-Ssl' => 'on',
             'Auth-User' => 'john@kolab.org',
             'Client-Ip' => '127.0.0.1',
             'Host' => '127.0.0.1',
             'Auth-SSL' => 'on',
             'Auth-SSL-Verify' => 'SUCCESS',
             'Auth-SSL-Subject' => '/CN=example.com',
             'Auth-SSL-Issuer' => '/CN=example.com',
             'Auth-SSL-Serial' => 'C07AD56B846B5BFF',
             'Auth-SSL-Fingerprint' => '29d6a80a123d13355ed16b4b04605e29cb55a5ad'
         ];
 
         // Pass
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'OK');
         $response->assertHeader('auth-port', \config('imap.imap_port'));
 
         // Invalid Password
         $modifiedHeaders = $headers;
         $modifiedHeaders['Auth-Pass'] = "Invalid";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         // Empty Password
         $modifiedHeaders = $headers;
         $modifiedHeaders['Auth-Pass'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         // Empty User
         $modifiedHeaders = $headers;
         $modifiedHeaders['Auth-User'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         // Invalid User
         $modifiedHeaders = $headers;
         $modifiedHeaders['Auth-User'] = "foo@kolab.org";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         // Empty Ip
         $modifiedHeaders = $headers;
         $modifiedHeaders['Client-Ip'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         // SMTP Auth Protocol
         $modifiedHeaders = $headers;
         $modifiedHeaders['Auth-Protocol'] = "smtp";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'OK');
-        $response->assertHeader('auth-server', \config('smtp.host'));
+        $response->assertHeader('auth-server', gethostbyname(\config('smtp.host')));
         $response->assertHeader('auth-port', \config('smtp.port'));
         $response->assertHeader('auth-pass', $pass);
 
         // Empty Auth Protocol
         $modifiedHeaders = $headers;
         $modifiedHeaders['Auth-Protocol'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
 
         // Guam
         $john->setSettings(['guam_enabled' => 'true']);
 
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'OK');
-        $response->assertHeader('auth-server', \config('imap.host'));
+        $response->assertHeader('auth-server', gethostbyname(\config('imap.host')));
         $response->assertHeader('auth-port', \config('imap.guam_port'));
 
 
         $companionApp = $this->getTestCompanionApp(
             'testdevice',
             $john,
             [
                 'notification_token' => 'notificationtoken',
                 'mfa_enabled' => 1,
                 'name' => 'testname',
             ]
         );
 
         // 2-FA with accepted auth attempt
         $authAttempt = \App\AuthAttempt::recordAuthAttempt($john, "127.0.0.1");
         $authAttempt->accept();
 
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'OK');
 
         // Deny
         $authAttempt->deny();
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         // 2-FA without device
         $companionApp->delete();
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'OK');
 
 
         // Geo-lockin (failure)
         $john->setSettings(['limit_geo' => '["PL","US"]']);
 
         $headers['Auth-Protocol'] = 'imap';
         $headers['Client-Ip'] = '127.0.0.1';
 
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'authentication failure');
 
         $authAttempt = \App\AuthAttempt::where('ip', $headers['Client-Ip'])->where('user_id', $john->id)->first();
         $this->assertSame('geolocation', $authAttempt->reason);
         \App\AuthAttempt::where('user_id', $john->id)->delete();
 
         // Geo-lockin (success)
         \App\IP4Net::create([
                 'net_number' => '127.0.0.0',
                 'net_broadcast' => '127.255.255.255',
                 'net_mask' => 8,
                 'country' => 'US',
                 'rir_name' => 'test',
                 'serial' => 1,
         ]);
 
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx");
         $response->assertStatus(200);
         $response->assertHeader('auth-status', 'OK');
 
         $this->assertCount(0, \App\AuthAttempt::where('user_id', $john->id)->get());
     }
 
     /**
      * Test the httpauth webhook
      */
     public function testNGINXHttpAuthHook(): void
     {
         $john = $this->getTestUser('john@kolab.org');
 
         $response = $this->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(200);
 
         $pass = \App\Utils::generatePassphrase();
         $headers = [
             'Php-Auth-Pw' => $pass,
             'Php-Auth-User' => 'john@kolab.org',
             'X-Forwarded-For' => '127.0.0.1',
             'X-Forwarded-Proto' => 'https',
             'X-Original-Uri' => '/iRony/',
             'X-Real-Ip' => '127.0.0.1',
         ];
 
         // Pass
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(200);
 
         // domain.tld\username
         $modifiedHeaders = $headers;
         $modifiedHeaders['Php-Auth-User'] = "kolab.org\\john";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(200);
 
         // Invalid Password
         $modifiedHeaders = $headers;
         $modifiedHeaders['Php-Auth-Pw'] = "Invalid";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(403);
 
         // Empty Password
         $modifiedHeaders = $headers;
         $modifiedHeaders['Php-Auth-Pw'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(401);
 
         // Empty User
         $modifiedHeaders = $headers;
         $modifiedHeaders['Php-Auth-User'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(200);
 
         // Invalid User
         $modifiedHeaders = $headers;
         $modifiedHeaders['Php-Auth-User'] = "foo@kolab.org";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(403);
 
         // Empty Ip
         $modifiedHeaders = $headers;
         $modifiedHeaders['X-Real-Ip'] = "";
         $response = $this->withHeaders($modifiedHeaders)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(403);
 
         $companionApp = $this->getTestCompanionApp(
             'testdevice',
             $john,
             [
                 'notification_token' => 'notificationtoken',
                 'mfa_enabled' => 1,
                 'name' => 'testname',
             ]
         );
 
         // 2-FA with accepted auth attempt
         $authAttempt = \App\AuthAttempt::recordAuthAttempt($john, "127.0.0.1");
         $authAttempt->accept();
 
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(200);
 
         // Deny
         $authAttempt->deny();
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(403);
 
         // 2-FA without device
         $companionApp->delete();
         $response = $this->withHeaders($headers)->get("api/webhooks/nginx-httpauth");
         $response->assertStatus(200);
     }
 }