Sending Email problem in webdynpro Application

Question

Hi all,
      I have the written following coding to send a mail.It was working fine till we upgrade our mailing server to Exchange server2007.
  Properties properties = new Properties();
   String SMTPIPAddress = "mail.exchange.com"
   String SMTPAddress = "mail.smtp.host";
    String mailId = "[email protected]";
    Session session;
    Provider p;     
    properties = System.getProperties();               
    properties.put(SMTPAddress, SMTPIPAddress);
    session = Session.getDefaultInstance(properties, null);
    Message message = new MimeMessage(session);               
    message.setFrom(new InternetAddress("[email protected]"));     
    message.addRecipient(Message.RecipientType.TO,
                                                   new InternetAddress(mailId));
    message.setSubject("Conference");           
    message.setText(strMailBody.toString());          
    Transport.send(message);
Now I am geeting the following error.
      Exception : Sending failed;  nested exception is:  
       javax.mail.MessagingException: 530 5.7.1 Client was not authenticated 
When I approahed the Admin people for the above error, since some relay must opened to receive the mail, they said it cannot be done in the exchange server.
Is there any other way to send mail (different codings)
Thanks in advance
Ponnusamy P

Answer 1

Hi Ponnusamy,
First of all, use
Session.getInstance()
instead of
Session.getDefaultInstance()
<i>Since the default session is potentially available to all code executing in the same Java virtual machine, and the session can contain security sensitive information such as user names and passwords, access to the default session is restricted.</i>
Second, I forgot, <i>To use SMTP authentication you'll need to set the mail.smtp.auth property [...]</i>. See also <a href="http://java.sun.com/products/javamail/javadocs/com/sun/mail/smtp/package-summary.html">com.sun.mail.smtp (JavaMail API documentation)</a>.
Everything together becomes
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", "mail.exchange.com");
Session session = Session.getInstance(props, new MyAuthenticator());
BTW, does the <i>AuthenticationFailedException</i> contain any additional information that indicates why authentication failed?
Just note that JavaMail supports <i>SMTP Authentication (RFC 2554) using the LOGIN, PLAIN, and DIGEST-MD5 mechanisms [...] When using DIGEST-MD5 authentication, you'll also need to supply an appropriate realm; your mail server administrator can supply this information. You can set this using the mail.smtp.sasl.realm property, [...]</i>.
So only LOGIN, PLAIN and DIGEST-MD5 are supported. It's very well possible your Exchange server is configured to support only NTLM and I can imagine your Exchange admin won't allow LOGIN authentication due to security reasons.
And a last remark. <i>If your username is foo, your mailbox name is Foo.Bar and your server is FUBAR, your username for connecting to your mailbox is not foo. Instead, it would be FUBAR\foo\Foo.Bar</i>.
Kind regards,
Sigiswald