How do I send an e-mail with authentication in MS Exchange

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Java

sir ,

below is my code in java ,this send mail without authenticate in ms exchange server,i want authenticate in ms exchange server ,

please help

public void sendSSL(String to, String from1, String host1, String port1, String subject, String body, String fileAttachment1, String attachmentMimeType1, String username1, String password1)
    throws Exception
  {
    String username = username1; String password = password1;
    String from = from1; String host = host1; String smtpPort = port1;
    String attachmentMimeType = attachmentMimeType1; String fileAttachment = fileAttachment1;
    String[] tosendadd = new String[1];
    from = username;
    tosendadd[0] = to;
    Properties props = new Properties();
    props.put("mail.pop3.host", host);
    Session session = Session.getDefaultInstance(props);
    props.put("mail.smtp.user", username);
    props.put("mail.smtp.password", password);
    props.put("mail.smtp.host", host);
    props.put("mail.smtp.port", smtpPort);

    int toCount = tosendadd.length;

    session = Session.getDefaultInstance(props, null);

    System.out.println("check");
    MimeMessage message = new MimeMessage(session);
    message.setFrom(new InternetAddress(from));
    InternetAddress[] address = new InternetAddress[toCount];
    for (int i = 0; i < toCount; i++)
      address[i] = new InternetAddress(tosendadd[i]);
    message.setRecipients(Message.RecipientType.TO, address);
    message.setSubject(subject);
    MimeBodyPart messageBodyPart = new MimeBodyPart();
    messageBodyPart.setDataHandler(new DataHandler(new HTMLDataSource(body)));
    Multipart multipart = new MimeMultipart();
    multipart.addBodyPart(messageBodyPart);
    System.out.println("dhirendra1");
    if (fileAttachment != null)
    {
      messageBodyPart = new MimeBodyPart();
      FileDataSource fds = new FileDataSource(fileAttachment);
      messageBodyPart.setDataHandler(new DataHandler(fds));
      messageBodyPart.setFileName("abc.zip");
      multipart.addBodyPart(messageBodyPart);
    }
    System.out.println("dhirendra2");
    message.setContent(multipart);
    Transport.send(message);
    System.out.println("dhirendra3");
  }