09-10-2002
Many people simply pipe mail received by either an MTA or MUA to a process. An MTA, such as sendmail, can receive mail and pipe it to a process. Often, mail is received by an MTA and sent to a user mailbox via a local MUA, and the MUA forwards the mail, via a pipe, to the standard-in.
Often, in a .forward file in a user directory has something like,
"|/home/user/bin/myprocess".
Or, in a file like the sendmail aliases file:
joe.user: "|/home/user/bin/myprocess"
There are many reasons to do this, a person can simply send mail to a host and in the message have embedded tokens that could be used for anything imaginable... for example, you could send a message to a user aliase and have an embedded command (with embedded security) telling your home computer to turn off the lights in your house (if you had a interface to your home lighting)....
You can literally do anything you can imagine by sending mail to a process.... your imagination is the limit.... you could send mail to our home computer and with an embedded token that could be used by a process to activate a video camera, another example.
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LEARN ABOUT DEBIAN
anubis
anubis(1) GNU Anubis anubis(1)
NAME
anubis -- an SMTP message submission daemon.
SYNOPSIS
anubis [options]
DESCRIPTION
GNU Anubis is an SMTP message submission daemon. It represents an intermediate layer between mail user agent (MUA) and mail transport agent
(MTA), receiving messages from the MUA, applying to them a set of predefined changes and finally inserting modified messages into an MTA
routing network. The set of changes applied to a message is configurable on a system-wide and per-user basis. The built-in configuration
language used for defining sets of changes allows for considerable flexibility and is easily extensible.
THE GNU ANUBIS MANUAL
The full documentation for GNU Anubis is maintained as a Texinfo manual. If the info and GNU Anubis programs are properly installed at
your site, the command
info anubis
should give you access to the complete manual.
REPORTING BUGS
Please send any bug reports, improvements, comments, suggestions, or questions to <bug-anubis@gnu.org>.
Before reporting a bug, make sure you have actually found a real bug. Carefully reread the documentation and see if it really says you can
do what you are trying to do. If it is not clear whether you should be able to do something or not, report that too; it's a bug in the doc-
umentation!
FILES
/etc/anubisrc - system configuration file
~/.anubisrc - user configuration file
SEE ALSO
grep(1), regex(7), perlre(1), pcre(3), sendmail(8), openssl(1), gpg(1), identd(1), pam(8), tcpd(8)
AUTHORS
The Anubis Team (read the AUTHORS file).
GNU Anubis Home Page:
http://www.gnu.org/software/anubis/
LICENSE
GNU Anubis is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your option) any later version.
GNU Anubis is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABIL-
ITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with GNU Anubis. If not, see <http://www.gnu.org/licenses/>.
anubis(1)