Automatic response: revert back mail

Hi all,
         through below code I am sending mail, basically this is a Querie form.
        protected void Do_Mail()
    {
        MailMessage msgMail = new MailMessage("queries@jica.org.in", "shankar@winrockindia.org");
        msgMail.To.Add("EEC_Credit@sidbi.in");
        msgMail.Subject = "Jica:Queries";
        msgMail.IsBodyHtml = true;
        string bodyText = "<html>........................<tr>    <td width='31%' valign='top'>Email</td>   <td width='2%' valign='top'><strong>:</strong></td>    <td ...