string to = "jane@contoso.com";
            string from = "ben@contoso.com";
            MailMessage message = new MailMessage(from, to);
            message.Subject = "Using the new SMTP client.";
            message.Body = @"Using this new feature, you can send an e-mail message from an application very easily.";
            SmtpClient client = new SmtpClient(server);
            // Credentials are necessary if the server requires the client 
            // to authenticate before it will send e-mail on the client's behalf.
            client.UseDefaultCredentials = true;

            try
            {
                client.Send(message);
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception caught in CreateTestMessage2(): {0}", ex.ToString());
            }