[HttpPost]
        public ActionResult Send(MailModel _objModelMail)
        {
            if (ModelState.IsValid)
            {
                MailMessage mail = new MailMessage();
                mail.To.Add(_objModelMail.To);
                mail.From = new MailAddress(_objModelMail.From);  //WYWALA!!!! przy add grade
                mail.Subject = _objModelMail.Subject;
                string Body = _objModelMail.Body;
                mail.Body = Body;
                mail.IsBodyHtml = true;
                SmtpClient smtp = new SmtpClient
                {
                    Host = "smtp.gmail.com",
                    Port = 587,
                    UseDefaultCredentials = false,
                    Credentials = new System.Net.NetworkCredential("test.na.projekt@gmail.com", "!Testnaprojekt"),
                    EnableSsl = true
                };
                smtp.Send(mail);

                var receiver = db.Users?.Where(x => x.Email == _objModelMail.To)?.FirstOrDefault();
                if(receiver != null)
                {
                    Message msg = new Message()
                    {
                        UserId = receiver.Id,
                        UserFrom = _objModelMail.Name + " " + _objModelMail.Surname,
                        From = _objModelMail.From,
                        Title = _objModelMail.Subject,
                        Body = _objModelMail.Body,
                        AddDate = DateTime.Now,
                        IsOn = true
                    };
                    db.Messages.Add(msg);
                    db.SaveChanges();
                }
            }
            //return RedirectToAction("Index", "Home");
            return Redirect(Request.UrlReferrer.ToString());
        }