Sun Java(tm) System Messaging Server 6.3-0.15 outgoing mail issue

Question

Hi,
We are running Sun Java(tm) System Messaging Server 6.3-0.15 (built Feb  9 2007).
with this java code if i change  email.setFrom(SenderEmial);   to any other email address than the mail server will send email form that email instead of authenticated which is a problem for us so that any one can misuse it. i need help regarding this issue.I think its due to lack of SSL security so i want to know that how i can enable SSL.
  Email email = new SimpleEmail();
    email.setSmtpPort(25);
    email.setAuthenticator(new DefaultAuthenticator("[email protected]","myPass"));
    email.setDebug(false);
    email.setHostName("mail.sunjavamail.com");
    email.setFrom(SenderEmial);  //By changing this my mail server is sending emails from any email address.
    email.setSubject("Hi");
    email.setMsg("Test Mail");
    email.addTo("[email protected]");
      // email.setTLS(true);
   // email.setSSL(true);
    email.send();
    System.out.println("Done");
Thanks..

Answer 1

Hi,
I do not think this is unusual.  Out of the box there are no restrictions on From: addresses, they're not required to match the domain of the sender or match up with DNS results.  You can configure various restrictions or even modify the from address based on the users authenticated credentials, but not by default. 
See the following documentation for details on restricting From: addresses:
https://wikis.oracle.com/display/CommSuite/Mail+Filtering+and+Access+Control#MailFilteringandAccessControl-FROMACCESSDescription
https://wikis.oracle.com/display/CommSuite/Handling+Forged+Email+by+Using+the+Sender+Policy+Framework