diff --git a/config/mail.php b/config/mail.php
index 26af507d9..5b647944b 100644
--- a/config/mail.php
+++ b/config/mail.php
@@ -13,7 +13,7 @@ return [
     |
     */
 
-    'default' => env('MAIL_MAILER', null),
+    'default' => env('MAIL_MAILER', 'array'),
 
     /*
     |--------------------------------------------------------------------------