public static int UpdateMailForwarding(MailAlias item)
        {
            // check account
            int accountCheck = SecurityContext.CheckAccount(DemandAccount.NotDemo | DemandAccount.IsActive);
            if (accountCheck < 0) return accountCheck;

            // load original meta item
            MailAlias origItem = (MailAlias)PackageController.GetPackageItem(item.Id);
            if (origItem == null)
                return BusinessErrorCodes.ERROR_MAIL_FORWARDINGS_PACKAGE_ITEM_NOT_FOUND;

            // check package
            int packageCheck = SecurityContext.CheckPackage(item.PackageId, DemandPackage.IsActive);
            if (packageCheck < 0) return packageCheck;

            // place log record
            TaskManager.StartTask("MAIL_FORWARDING", "UPDATE", origItem.Name);
            TaskManager.ItemId = item.Id;

            try
            {
                // update forwarding
                MailServer mail = new MailServer();
                ServiceProviderProxy.Init(mail, origItem.ServiceId);
                MailAlias alias = new MailAlias();
                alias.Name = origItem.Name;
                alias.ForwardTo = item.ForwardTo;

                //For MailEnable alias updating
                alias.DeleteOnForward = true;
                alias.ForwardingAddresses = new string[1];
                alias.ForwardingAddresses[0] = item.ForwardTo;
               
                //
                
                // update service item
                mail.UpdateMailAlias(alias);
                return 0;
            }
            catch (Exception ex)
            {
                throw TaskManager.WriteError(ex);
            }
            finally
            {
                TaskManager.CompleteTask();
            }
        }