Send Mail Automatically in asp.net

First you include System.Net.Mail name space ..
Then you insert the below query in button click event...

try
            {
                MailMessage message = new MailMessage();
                message.From = new MailAddress("raja.com");
                message.To.Add("raja30march90@gmail.com");
                message.Subject = "Subject";
                message.Body = "Body Content";

                SmtpClient sptclt = new SmtpClient();
                sptclt.Host = "127.5.7.1";
                sptclt.Send(message);
                lblStatus.Text = "Mail send successfully";
            }
            catch (Exception e)
            {
                lblError.Text = "Mail sent Failed";
            }