JDIC provides some functionality to do this. Although much of JDIC was absorbed into java.awt.Desktop
in Java 6, it didn't include the email composition bits. Unfortunately the JDIC binaries disappeared with the transition of java.net to the Kenai platform; I uploaded the most recent versions I could find to the project JIRA.
JDIC doesn't play well in OSGi, so I recently extracted the relevant MAPI bits into a bundle called jmapi.