in class mail public static void SendMail(string MailTo, string MailFrom, string Subject,String MailBody) { System.Net.Mail.MailMessage objMailMessage = new System.Net.Mail.MailMessage(MailFrom, MailTo); objMailMessage.Subject = Subject; objMailMessage.IsBodyHtml = true; objMailMessage.Body = MailBody; SmtpClient objsmtp = new SmtpClient(); objsmtp.Send(objMailMessage); } in aspx.cs call Sendmail function string Subject="Hoe to send mail"; strimg MailBody=" Dear user your Username=" +username +""; "password ="+ password; SendMail(to@mail.com, from@mail.com, Subject,MailBody) and also set smtp setting in webconfig