jSieve is a Java implementation of the Sieve mail
filtering language defined by RFC 3028. Sieve is
an extensible mail filtering language. Its limited
expressiveness (no loops or variables and no tests
with side effects) allows user created scripts to
be run safely on email servers. Sieve is targeted
at the final delivery phase (where an incoming
email is transferred to a user's mailbox). jSieve
is implemented as a language processor that can be
plugged into any Internet mail application to add
Sieve support.
