libapache-mime4j-java - 0.8.2-1 main

mime4j provides a parser, MimeStreamParser, for e-mail message streams in
plain rfc822 and MIME format. The parser uses a callback mechanism to report
parsing events such as the start of an entity header, the start of a body,
etc.
If you are familiar with the SAX XML parser interface you should have no
problem getting started with mime4j.