[Web] Minor fixes and changes

data/web/inc/functions.mailbox.inc.php

@@ -3383,7 +3383,7 @@ function mailbox($_action, $_type, $_data = null, $_extra = null) {
               $_SESSION['return'][] = array(
                 'type' => 'danger',
                 'log' => array(__FUNCTION__, $_action, $_type, $_data_log, $_attr),
-                'msg' => 'domain_not_empty'
+                'msg' => array('domain_not_empty', $domain)
               );
               continue;
             }