Fixes #5413 Fixed postfix table transport saving

postfix/admin/systems/services/postfix/class_servicePostfix.inc

@@ -134,6 +134,12 @@ class servicePostfix extends simpleService
     );
   }
 
+  protected function shouldSave()
+  {
+    /* We need ldap_save to always run */
+    return TRUE;
+  }
+
   function ldap_save ()
   {
     global $config;