Switch default mail config to Mailgun.

app/config/mail.php

@@ -28,7 +28,7 @@ return array(
 	|
 	*/
 
-	'host' => 'smtp.postmarkapp.com',
+	'host' => 'smtp.mailgun.org',
 
 	/*
 	|--------------------------------------------------------------------------
@@ -41,7 +41,7 @@ return array(
 	|
 	*/
 
-	'port' => 2525,
+	'port' => 587,
 
 	/*
 	|--------------------------------------------------------------------------