How to send mail

hi
check fallowing
try{
            string enableEmail = getValueFromList("EnableEmail").Trim();
               if (enableEmail != null)
               {
                   if ((enableEmail.ToString().Trim().ToUpper() != "T")
                       &&
                   (enableEmail.ToString().Trim().ToUpper() != "TRUE"))
                   {
                    return "Email sending is not enabled";
                   }
               }
                MailMessage msg = new MailMessage();
               msg.From = new MailAddress("[email protected]");
                msg.To.Add("[email protected]");
                msg.Body = "Testing the automatic mail";
                msg.IsBodyHtml = true;
                msg.Subject = "Movie Data";
                SmtpClient smt = new SmtpClient("web mail url like gmail (smtp.gmail.com)");
                smt.Port = 587;
             smt.Credentials = new NetworkCredential("[email protected]", "pasword");
                smt.EnableSsl = true;
                smt.Send(msg);
               string script = "";
                this.ClientScript.RegisterClientScriptBlock(this.GetType(), "sendMail", script);

               //return "Success";
            }
            catch (Exception ex)
            {
                throw ex;
            }