我碰到情況如下：1.通過SSL加密發送2.通過ssl.alibaba-inc.com服務器，端口465發送郵件提示“操作已超時”3.代碼沒變，發送126,gmail不管是普通郵件還是日程都可以發送成功!Code:  string hostServer = "ssl.alibaba-inc.com";  string email = myemail;  string authName = name;  string password = mypassword;  int port = 465;   MailMessage msg = new MailMessage(email, EmailAddress.Text.Trim());   msg.Body = "hello!";   msg.Subject = "hello";   SmtpClient smtp = new SmtpClient();   smtp.Credentials = new NetworkCredential(email, password);   smtp.Port = 465;   smtp.Host = "ssl.alibaba-inc.com";   smtp.EnableSsl = true;   smtp.Timeout = 50000;   try   {    smtp.Send(msg);   }   catch (SmtpException ex)   {    ex.ToString();   }