利用SmtpClient发送邮件

代码：

1  163邮箱 HOST:smtp.163.com

  public static string CreateTimeoutTestMessage(string server) { string Success = "发送成功"; try { string _to = "1035092449@qq.com"; string _from = "young-20@163.com"; string _subject = "Using the new SMTP client."; string _body = @"Using this new feature, you can send an e-mail message from an application very easily."; MailMessage message = new MailMessage(); message.From = new MailAddress(_from); //可以利用MailMessage.To.Add方法增加要发送的邮件地址 message .To .Add (new MailAddress ("652105072@qq.com")); message.To.Add(new MailAddress(_to)); message.Subject = _subject; message.Body = _body; //添加附件 Attachment a = new Attachment(@"C:/Users/Administrator/Desktop/smtpclient.rar"); message.Attachments.Add(a); //设置邮箱的地址或IP SmtpClient client = new SmtpClient(server); //设置邮箱端口，pop3端口:110, smtp端口是:25 client.Port = 25; //设置超时时间 client.Timeout = 9999; //要输入邮箱用户名与密码 client.Credentials = new NetworkCredential("young-20@163.com", "******"); client.Send(message); } catch (Exception ex) { Success = ex.ToString(); } return Success; } 

2 QQ邮箱

  QQ邮箱默认的SMTP服务是关闭的，要自己去开通。

  HOST:smtp.qq.com

try { SmtpClient client = new SmtpClient(); client.Host = "smtp.qq.com"; MailMessage mm = new MailMessage(); client.Port = 25; mm.From = new MailAddress("652105072@qq.com"); mm.To.Add(new MailAddress("1035092449@qq.com")); mm.Subject = "Hello~!"; mm.Body = "HIthere.here is a post "; mm.IsBodyHtml = false; mm.Priority = MailPriority.High; client.Credentials = new NetworkCredential("652105072@qq.com", "******"); client .Send (mm); } catch (Exception ex) { MessageBox.Show(ex.Message); }