You might find these books useful. If you know of other books we should list, please let us know at mai-dev@eclipse.org.
JavaMail API, by Elliotte Rusty Harold.
Internet Email, by David Wood.
Programmer’s Guide to Internet Mail, by John Rhoton.
Internet Email Protocols: A Developer’s Guide, by Kevin Johnson.
Java Network Programming, 2nd Edition, by Elliotte Rusty Harold.
Essential Email Standards: RFCs and Protocols Made Practical, by Pete Loshin.
Internet Messaging: From the Desktop to the Enterprise, by Marshall T. Rose and David Strom.
Internet E-Mail: Protocols, Standards, & Implementation, by Lawrence Hughes.
Managing IMAP, by Dianna Mullet and Kevin Mullet.
Java Cookbook: Solutions and Examples for Java Developers, by Ian F. Darwin.
JavaServer Pages (JSP) Fast & Easy Web Development, by Aneesha Bakharia.