Help with SMTP mailer

static bool mailSent = false;
        private static void SendCompletedCallback(object sender, AsyncCompletedEventArgs e)
        {
            // Get the unique identifier for this asynchronous operation.
            String token = (string)e.UserState;
 
            if (e.Cancelled)
            {
                Console.WriteLine("[{0}] Send canceled.", token);
            }
            if (e.Error != null)
            {
                Console.WriteLine("[{0}] {1}", token, e.Error.ToString());
            }
            else
            {
                Console.WriteLine("Message sent.");
            }
            mailSent = true;
        }
        public static void SendMail(string args, string emailto, string theServer)
        {
            // Command line argument must the the SMTP host.
            SmtpClient client = new SmtpClient(args.ToString());
            // Specify the e-mail sender.
            // Create a mailing address that includes a UTF8 character
            // in the display name.
            MailAddress from = new MailAddress("alerts@mydomain.com",
               "alerts@activesos.com",
            System.Text.Encoding.UTF8);
            // Set destinations for the e-mail message.
            MailAddress to = new MailAddress(emailto);
            // Specify the message content.
            MailMessage message = new MailMessage(from, to);
            message.Body = "alert: Server, " + theServer + " (IS DOWN)";
            // Include some non-ASCII characters in body and subject.
            string someArrows = new string(new char[] { '\u2190', '\u2191', '\u2192', '\u2193' });
            message.Body += Environment.NewLine + someArrows;
            message.BodyEncoding = System.Text.Encoding.UTF8;
            message.Subject = "alert";
            message.SubjectEncoding = System.Text.Encoding.UTF8;
            // Set the method that is called back when the send operation ends.
            client.SendCompleted += new
            SendCompletedEventHandler(SendCompletedCallback);
            // The userState can be any object that allows your callback 
            // method to identify this send operation.
            // For this example, the userToken is a string constant.
            string userState = "test message";
            client.SendAsync(message, userState);
            Thread.Sleep(10000);
            message.Dispose();
            Console.WriteLine("Goodbye.");
        }
 
 
 
 
 
 
        #endregion
 
 
    }
}