regarding sending mail to gmail account

i am trying to send mail by creating the C# application but i am not able to send . Can u tell me what may be the probable cause

hi

you can use this coding...

using System.Web.Mail;


string to = "mail Id";
string from = "Mail Id";
string sub = "";
SmtpMail.Send(from, to, sub, "body of the mail");

And in IIS u should add the following 127.0.0.0