add maildomain from customfield

app/Http/Actions/CreateAccount.php

@@ -39,8 +39,7 @@ class CreateAccount extends AddonController
 
             //update domain
             if($params['customfields']['maildomain']){
-                $this->hosting()->domain = $params['customfields']['maildomain'];
-                $this->hosting()->save();
+                $params['domain'] = $params['customfields']['maildomain'];
             }
 
             /**