C# - Failure sending mail

[atn91]

This code works fine on my local machine ut when I deploy it. it gives \[code\]Failure sending mail\[/code\] error.. Please Help... \[code\]MailAddress addrsTo = new MailAddress(toEmail);MailAddress addrsFrom = new MailAddress("[email protected]", "XXX Title");MailMessage mailmsg = new MailMessage(addrsFrom, addrsTo);mailmsg.Subject = mailSbjct;mailmsg.Body = "XXX Body";SmtpClient smtp = new SmtpClient("mail.XXX.com");smtp.EnableSsl = false;smtp.Port = 26;smtp.Credentials = new NetworkCredential("[email protected]", "XXXXXXX");try { smtp.Send(mailmsg);} catch (Exception exc) { throw new XXXException(1234, "---" + exc.Message);}\[/code\]