public ActionResult MailModifyAdvanced(string uniqueId, SpecialFolder specialFolder)
        {
            MailRepository  mailRepository = Session["MailRepository"] as MailRepository;
            IMessageSummary getMessageInfo = mailRepository.GetMessageInfo(uniqueId, specialFolder);

            ViewBag.getMessageInfo = getMessageInfo;

            if (!getMessageInfo.Flags.Value.HasFlag(MessageFlags.Seen))
            {
                MailAddFlags(uniqueId, MessageFlags.Seen);
            }

            return(View("~/Views/ControlPanel/MailAdvanced/MailModifyAdvanced.cshtml", mailRepository.GetMessage(uniqueId, specialFolder)));
        }