diff --git a/Application/Controller/Admin/MailConfigCheck.php b/Application/Controller/Admin/MailConfigCheck.php
index fd1f85e..b4db9c5 100644
--- a/Application/Controller/Admin/MailConfigCheck.php
+++ b/Application/Controller/Admin/MailConfigCheck.php
@@ -87,6 +87,13 @@ class MailConfigCheck extends AdminDetailsController
 
     protected function getCurrentMailer(): void
     {
+        set_error_handler(
+            function ($errno, $errstr, $errfile, $errline) {
+                throw oxNew(Exception::class, $errstr.' in '.$errfile.'('.$errline.')', $errno);
+            },
+            E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
+        );
+
         try {
             $shop = Registry::getConfig()->getActiveShop();
 
@@ -114,5 +121,7 @@ class MailConfigCheck extends AdminDetailsController
             ob_end_clean();
             Registry::getUtilsView()->addErrorToDisplay($e);
         }
+
+        restore_error_handler();
     }
 }