[HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<ActionResult> Index(EmailFormModel model)
        {
            if (ModelState.IsValid)
            {
                var body = "<p>Email From: {0} ({1})</p><p>Message:</p><p>{2}</p>";
                var message = new MailMessage();
                message.To.Add(new MailAddress("aaa@gmail.com"));
                message.From = new MailAddress("aaa@gmailcom");
                message.Subject = "Your email subject";
                message.Body = string.Format(body, model.FromName, model.FromEmail, model.FromSubject, model.Message);
                message.IsBodyHtml = true;
                if (model.Upload != null && model.Upload.ContentLength > 0)
                {
                   message.Attachments.Add(new Attachment(model.Upload.InputStream, Path.GetFileName(model.Upload.FileName)));
                }
                using (var smtp = new SmtpClient())
                {
                    var credential = new NetworkCredential
                    {
                        UserName = "aaa@gmail.com",
                        Password = "aaa"
                    };
                    smtp.Credentials = credential;
                    smtp.Host = "smtp.gmail.com";
                    smtp.Port = 587;
                    smtp.EnableSsl = true;
                    await smtp.SendMailAsync(message);
                    ViewBag.Message = "Your message has been sent!";


                    ModelState.Clear();
                    return View("Index");
                }
            }
            return View(model);