Send mail works locally but not on server?

Question

This code works locally, but when I upload it to my server on Godaddy, it does not send the e-mail. Any idea why it doesn't work on their server? What do I need to change?

try {
    MailMessage mail = new MailMessage();
    SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");

    mail.From = new MailAddress("[email protected]");
    mail.To.Add("[email protected]");
    mail.Subject = "New sign up";
    mail.Body = "New member";

    SmtpServer.Port = 587;
    SmtpServer.Credentials = new System.Net.NetworkCredential("[email protected]", "**Mypass**");
    SmtpServer.EnableSsl = true;

    SmtpServer.Send(mail);
} catch(Exception ex) {
    throw ex;
}

Answer 1

They may be blocking outgoing SMTP connections in order to prevent spammers from using their service to send spam. You should check what error messages you're getting and check your server host's policy.