message-WPF實現發送郵件功能，郵件發不出去怎麼回事。求助！

WPF實現發送郵件功能，郵件發不出去怎麼回事。求助！

MailMessage message = new MailMessage();
message.To.Add("[email protected]");
message.From = new MailAddress("[email protected]");
message.Subject = "SUBJECT SUBJECT";
message.SubjectEncoding = Encoding.UTF8;
message.Body = "Body Body";
message.BodyEncoding = Encoding.UTF8;
message.IsBodyHtml = false;
message.Priority = MailPriority.Normal;
SmtpClient smtp = new SmtpClient();
smtp.Credentials = new System.Net.NetworkCredential("654321","password");
smtp.Host = "smtp.qq.com";
smtp.Port = 25;
object userState = message;
smtp.SendAsync(message,userState);

上面是代碼，不知道什麼問題，運行不報錯，就是收不到郵件。我是用的qq郵箱發的。

最佳回答：

檢查下用戶名密碼端口和smtp服務器，另外你的qq郵箱是否啟用了smtp