JAVAMAIL: ошибка авторизации NTLM

я пытаюсь отправить электронное письмо с java в локальной сети, используя сервер обмена Microsoft

есть мой код:

import java.io.UnsupportedEncodingException;
import java.util.Properties;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;


public class Main {


        public static void main(String[] args) {

            final String username = "[email protected]";
            final String password = "password";

            Properties props = new Properties();
            props.put("mail.smtp.auth", "true");
            props.put("mail.debug", "true");
            props.put("mail.smtp.host", "exchange_host.MyDomain.com");
            props.put("mail.smtp.port", "25");
            props.put("mail.smtp.auth.mechanisms","NTLM");
            props.put("mail.smtp.auth.ntlm.domain","MyDomain");


            Session session = Session.getInstance(props,new MyAuthenticator(username,password));

            try {

                Message message = new MimeMessage(session);
                message.setFrom(new InternetAddress("[email protected]"));
                message.setRecipients(Message.RecipientType.TO,
                    InternetAddress.parse("recipent_adresse"));
                message.setSubject("Testing Subject");
                message.setText("Dear Mail Crawler,"
                    + "\n\n No spam to my email, please!");

                Transport.send(message);

                System.out.println("Done");

            } catch (MessagingException e) {
                throw new RuntimeException(e);
            }
        }
    }

и это мой класс аутентификатора:

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class MyAuthenticator extends Authenticator {

     String user;
     String pw;
     public MyAuthenticator (String username, String password)
     {
        super();
        this.user = username;
        this.pw = password;
     }
    public PasswordAuthentication getPasswordAuthentication()
    {
       return new PasswordAuthentication(user, pw);
    }

}

я использую механизм NTLM, но получаю эту ошибку:

DEBUG: JavaMail version 1.4.7
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "echange_server.MyDomain.com", port 25, isSSL false
220 echange_server.MyDomain.com Microsoft ESMTP MAIL Service ready at Mon, 30 Sep 2013 09:01:08 +0100
DEBUG SMTP: connected to host "echange_server.MyDomain.com", port: 25

EHLO host.MyDomain.com
250-echange_server.MyDomain.com Hello [xx.xx.xx.xx]
250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250-XRDST
250 XSHADOW
DEBUG SMTP: Found extension "SIZE", arg ""
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "DSN", arg ""
DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "X-ANONYMOUSTLS", arg ""
DEBUG SMTP: Found extension "AUTH", arg "NTLM"
DEBUG SMTP: Found extension "X-EXPS", arg "GSSAPI NTLM"
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Found extension "BINARYMIME", arg ""
DEBUG SMTP: Found extension "CHUNKING", arg ""
DEBUG SMTP: Found extension "XEXCH50", arg ""
DEBUG SMTP: Found extension "XRDST", arg ""
DEBUG SMTP: Found extension "XSHADOW", arg ""
DEBUG SMTP: Attempt to authenticate using mechanisms: NTLM
DEBUG SMTP: AUTH NTLM failed

Exception in thread "main" java.lang.RuntimeException: javax.mail.AuthenticationFailedException: 250-exchange_host.MyDomain.com Hello [xx.xx.xx.xx]

    at testPakcage.Main.main(Main.java:51)
Caused by: javax.mail.AuthenticationFailedException: 250-exchange_host.MyDomain.com Hello [xx.xx.xx.xx]

пожалуйста, помогите мне, я потратил несколько дней на поиск решения, но ничего не нашел