Hi, here is my code, which is same as your one. but not working as System.Net.Mail classes doesn't support SMTPS.

SmtpClient client = new SmtpClient("smtp.gmail.com", 465);
MailMessage mail_msg = new MailMessage();

            MailAddress fromAdd = new MailAddress(tbFrom.Text.Trim());
            mail\_msg.From = fromAdd;
            mail\_msg.To.Add(new MailAddress(tbTo.Text.Trim()));
            mail\_msg.Subject = tbSubject.Text;
            mail\_msg.IsBodyHtml = true;
            mail\_msg.Body = "Message From: " + tbFrom.Text.Trim() + "Subject:" + tbSubject.Text.Trim() + "Email: " + tbTo.Text.Trim() + "Content: " + tbContent.Text.Trim();

            System.Net.NetworkCredential basicCredential = new System.Net.NetworkCredential(tbFrom.Text, "my password");
            client.EnableSsl = true;
            client.UseDefaultCredentials = false;
            client.Credentials = basicCredential;
            client.Send(mail\_msg);

Himanshu Manjarawala. Sr. Software engineer @AutomationAnywhere http://www.himanshumbi.blogspot.com http://www.fieredotnet.wordpress.com