Hi Check the following code SmtpClient smtpClient = new SmtpClient(); MailMessage message = new MailMessage(); MailAddress fromAddress = new MailAddress(txtEmail.Text); smtpClient.Host = "mail.xyz.com"; smtpClient.Port = 25; message.From = fromAddress; message.To.Add("abc@xyz.com"); message.Subject = "put some subject"; message.IsBodyHtml = false; message.Body = "your body text"; smtpClient.Send(message); put this code under your send button event.