sending mail successfully in localhost but don't when publish on server

Question

If it is working on local and now on server, then there may not be code issue, you need to check other things like firewall settings.
What error you got exactly ?
I use all ports number 587 /25/465, see below snippet
C#
Copy Code
MailMessage mail = new MailMessage();
mail.Subject = "Your Subject";
mail.From = new MailAddress("senderMailAddress");
mail.To.Add("ReceiverMailAddress");
mail.Body = "Hello! your mail content goes here...";
mail.IsBodyHtml = true;

SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.EnableSsl = true;
NetworkCredential netCre = new NetworkCredential("SenderMailAddress","SenderPassword" );
smtp.Credentials = netCre;

try
{
smtp.Send(mail);
}
catch (Exception ex)
{
}