MailMessage mail =new MailMessage(); mail.To ="me@163.com"; mail.From ="you@163.com"; mail.Subject ="this is a test email."; mail.Body ="Some text goes here"; mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1"); //basic authentication mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "AlleNny"); //set your username here mail.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "Password"); //set your password here SmtpMail.SmtpServer ="smtp.163.com"; //your real server goes here SmtpMail.Send( mail );