1. 首先要确保你已经启用了 ASP.NET MVC 的通知功能，在Web.config文件中添加以下配置：

2. 请确保你已经正确设置了邮件服务器，可以通过以下代码进行测试：

SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.yourdomain.com";
smtp.Port = 587;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential("youremail@yourdomain.com", "yourpassword");

try
{
   smtp.Send("youremail@yourdomain.com", "recipient@domain.com", "Subject", "Body");
}
catch (Exception ex)
{
   Console.WriteLine(ex.ToString());
}

3. 检查你的通知代码是否正确，例如：

public ActionResult SendNotification()
{
   string email = "recipient@domain.com";
   string subject = "Test notification";
   string body = "This is a test notification.";

   MailMessage message = new MailMessage();
   message.To.Add(new MailAddress(email));
   message.Subject = subject;
   message.Body = body;
   message.IsBodyHtml = true;

   SmtpClient smtp = new SmtpClient();
   smtp.Send(message);

   return View();
}

如果以上步骤没有解决你的问题，请检查你的电子邮件软件或服务商是否有设置限制。