Add driver to mail config.

app/config/mail.php

@@ -4,6 +4,21 @@ return array(
 
 	/*
 	|--------------------------------------------------------------------------
+	| Mail Driver
+	|--------------------------------------------------------------------------
+	|
+	| Laravel supports both SMTP and PHP's "mail" function as drivers for the
+	| sending of e-mail. You may specify which one you're using throughout
+	| your application here. By default, Laravel is setup for SMTP mail.
+	|
+	| Supported: "smtp", "mail"
+	|
+	*/
+
+	'driver' => 'smtp',
+
+	/*
+	|--------------------------------------------------------------------------
 	| SMTP Host Address
 	|--------------------------------------------------------------------------
 	|