Tiger JMail is a direct replacement for Sun's
javamail, but with an LGPL license and fewer bugs.
TJ works with both the Kaffe and Sun JVMs. It's
tested, maintained, and in active use. TJ works
well, but there's a lot of room for improvement.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.