MailMessage message = new MailMessage();
message.To.Add("123456@qq.com");
message.From = new MailAddress("654321@qq.com");
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);
上面是代码,不知道什么问题,运行不报错,就是收不到邮件。我是用的qq邮箱发的。