//
// create the generator for creating an smime/compressed message
//
SMIMECompressedGenerator gen = new SMIMECompressedGenerator();
//
// create the base for our message
//
MimeBodyPart msg = new MimeBodyPart();
msg.setDataHandler(new DataHandler(new FileDataSource(new File(args[0]))));
msg.setHeader("Content-Type", "application/octet-stream");
msg.setHeader("Content-Transfer-Encoding", "binary");
MimeBodyPart mp = gen.generate(msg, SMIMECompressedGenerator.ZLIB);
//
// Get a Session object and create the mail message
//
Properties props = System.getProperties();
Session session = Session.getDefaultInstance(props, null);
Address fromUser = new InternetAddress("\"Eric H. Echidna\"<eric@bouncycastle.org>");
Address toUser = new InternetAddress("example@bouncycastle.org");
MimeMessage body = new MimeMessage(session);
body.setFrom(fromUser);
body.setRecipient(Message.RecipientType.TO, toUser);
body.setSubject("example compressed message");
body.setContent(mp.getContent(), mp.getContentType());
body.saveChanges();
body.writeTo(new FileOutputStream("compressed.message"));
