Description:

Vacation is a Horde module for managing user e-mail "vacation notices"
or "auto-responders." It works via a local vacation program which must
be installed and functioning on the server. It supports vacation
programs using the .forward-style forwarding mechanism supported by
several popular mailers, as well as qmail and SQL based
implementations. While it has been released and is in production use
at many sites, it is also under heavy development in an effort to
expand and improve the module.