c# calls qq mailbox smtp to send mail modified version code

try { MailMessage mm = new MailMessage(); MailAddress Fromma = new MailAddress("xxxx@qq.com"); MailAddress Toma = new MailAddress("MMMMMMM@qq.com", null); mm.From = Fromma; //收件人 mm.To.Add("MMMMMM@qq.com"); //邮箱标题 mm.Subject = "Hello Dear:"; mm.IsBodyHtml = true; //邮件内容 mm.Body = "你好Mr流星！"; //内容的编码格式 mm.BodyEncoding = System.Text.Encoding.UTF8; //mm.ReplyTo = Toma; //mm.Sender =Fromma; //mm.IsBodyHtml = false; mm.DeliveryNotificationOptions = DeliveryNotificationOptions.OnSuccess; mm.CC.Add(Toma); SmtpClient sc = new SmtpClient(); NetworkCredential nc = new NetworkCredential(); nc.UserName = "XXXXX@qq.com";//你的邮箱地址 nc.Password = "zzzzz";//你的邮箱密码,这里的密码是xxxxx@qq.com邮箱的密码，特别说明下~ sc.UseDefaultCredentials = true; sc.DeliveryMethod = SmtpDeliveryMethod.Network; sc.Credentials = nc; //如果这里报mail from address must be same as authorization user这个错误，是你的QQ邮箱没有开启SMTP， //到你自己的邮箱设置一下就可以啦！在帐户下面,如果是163邮箱的话，下面该成smtp.163.com sc.Host = "smtp.qq.com"; sc.Send(mm); } catch (Exception ex) { throw new Exception(ex.Message); }