Security :: Sending Email In Asp 3.5 C Sharp / Unable To Recived The Mail?

I am writing the code for contactus module for DNN. But i ma unable to recived the mai. what i m missing in the code.

SmtpClient smtpClient = new SmtpClient();
MailMessage mailMsg = new MailMessage();
MailAddress fromAddress = new MailAddress("friendemail@mail.com", "friend");
smtpClient.Host = "abc.mail.com";
//smtpClient.Port = 587;
smtpClient.Port = 25;
mailMsg.From = fromAddress;
mailMsg.To.Add(myaddress@mail.com");
mailMsg.Subject = "test message";
mailMsg.IsBodyHtml = false;
mailMsg.Body = "hello friend";
try
{
smtpClient.Send(mailMsg);
}
catch (Exception ex)
{
// lblstatus = "sending fail" + ex.Message;
}