ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
                service.Credentials = new NetworkCredential("1800476", "a96321452xd0202!");
                service.AutodiscoverUrl("kevin-wu@systex.com");
                EmailMessage message = new EmailMessage(service);



                // Add properties to the email message.
                message.Subject = "Interesting";
                message.Body = "The merger is finalized.";
                message.ToRecipients.Add("kevin84020202@gmail.com");
                message.SendAndSaveCopy();