anubis -- An outgoing mail processor and the SMTP tunnel.<hr>
<a href="http://www.gnu.org/software/anubis/">http://www.gnu.org/software/anubis/</a><hr>
GNU Anubis is an outgoing mail processor. It goes between the MUA (Mail
User Agent) and the MTA (Mail Transport Agent), and can perform on the fly
various sorts of processing and conversion on the outgoing mail in accord
with the sender's specified rules, based on a highly configurable regular
expressions system. It operates as a proxy server, independently from
mail user agents.  GNU Anubis can edit outgoing mail headers, encrypt
and/or sign mail with the GNU Privacy Guard, build secure SMTP tunnels
(Simple Mail Transport Protocol) using the TLS/SSL encryption even if
your mail user agent doesn't support it, or tunnel a connection through
a SOCKS proxy server.
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