public ActionResult Index()
        {
            string timestamp = Request.Params["scts"];
            string sender    = Request.Params["oa"];
            string content   = Request.Params["ud"];

            if (sender != null)
            {
                sender = sender.Trim('+', ' ');
                sender = s_NameMap.LookupNumber(sender);
            }

            MailMessage mm = new MailMessage(Settings.MailFrom, Settings.MailTo);

            mm.Subject = "SMS from " + sender;
            mm.Body    = content ?? "Empty message";
            SmtpClient client = new SmtpClient(Settings.SmtpHost, 587);

            client.Credentials    = new NetworkCredential(Settings.SmtpUser, Settings.SmtpPassword);
            client.EnableSsl      = true;
            client.DeliveryFormat = SmtpDeliveryFormat.International;
            client.Send(mm);

            return(Content("OK"));
        }