diff --git a/config/mail.php b/config/mail.php
index db9633658b7..88bb0b797ed 100644
--- a/config/mail.php
+++ b/config/mail.php
@@ -42,7 +42,6 @@
             'username' => env('MAIL_USERNAME'),
             'password' => env('MAIL_PASSWORD'),
             'timeout' => null,
-            'auth_mode' => null,
         ],
 
         'ses' => [