mailmessage发邮件

System.Web.Mail.MailMessage  Mailer = new System.Web.Mail.MailMessage();
Mailer.From = "sftsft@sina.com";
Mailer.To = "sftsft@sina.com";
Mailer.Subject ="发送测试";
Mailer.Body= "11111111111111111111111111111";
Mailer.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
Mailer.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "xxx");
Mailer.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "xxxx");
SmtpMail.SmtpServer = "smtp.sina.com.cn";
SmtpMail.Send(Mailer);