The JavaMail(TM) 1.3 API provides a set of abstract classes that model
a mail system. The API provides a platform independent and protocol
independent framework to build Java technology-based mail and messaging
applications. The JavaMail(TM) API is implemented as a Java platform
optional package and is also available as part of the Java 2 platform,
Enterprise Edition. Sun provides a royalty-free reference
implementation, in binary form, that developers will be able to use and
ship.