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maildrop - mail delivery agent with filtering abilities
Copyright 1998-2001, Double Precision Inc.
This program is distributed under the terms of the GNU General Public
License. See COPYING for additional information.
Where to find maildrop
Join the maildrop mailing list -
http://lists.sourceforge.net/lists/listinfo/courier-maildrop.
I've started a list of "tips and tricks" for writing mail filters with
maildrop.
The HTML version of the maildrop README is located at
http://www.flounder.net/~mrsam/maildrop/. Although the following files
may also be found there, please check your favorite archive for any
local copies.
Download maildrop: http://www.courier-mta.org/download.php#maildrop
Building RPMs
Starting with version 0.99, it is possible to build binary RPMs
directly from the source tarball, so there's no longer a need to
provide a separate set of source and binary RPMs. You will need RPM
3.0 or higher in order to build a binary RPM. Execute the following
command:
rpm -ta maildrop-1.3.7.tar.gz
The binary RPM will be built with a customized configuration (userdb,
GDBM, and quota enhancements enabled). Afterwards, simply execute rpm
-i to install it. That's it.
If you would like to change the RPM build options, move
maildrop-1.3.7.tar.gz to your SOURCES directory, extract the file
maildrop.spec, move it to your SPECS directory, customize it if
necessary, then build from the spec file.
maildrop includes documentation in HTML, as well as traditional man
pages. The HTML versions may also be found at
http://www.flounder.net/~mrsam/maildrop/maildrop.html.
Introduction
maildrop is the mail filter/mail deilvery agent that's used by the
Courier Mail Server. You do not need to download maildrop from here if
you already have Courier installed. This is a standalone build of the
maildrop mail filter that can be used with other mail servers.
maildrop is a replacement for your local mail delivery agent. maildrop
reads a mail message from standard input, then delivers the message to
your mailbox. maildrop knows how to deliver mail to mbox-style
mailboxes, and maildirs. "maildir" is a mailbox format used by the
Qmail MTA.
maildrop will optionally read instructions from a file, which
describes how to filter incoming mail. Instructions can be provided
having mail delivered to alternate mailboxes, or forwarded somewhere
else. Unlike procmail, maildrop uses a structured filtering language.
maildrop is written in C++, and is significantly larger than procmail
in compiled form. However, it uses resources much more efficiently.
Unlike procmail, maildrop will not read a 10 megabyte mail message
into memory. Large messages are saved in a temporary file, and are
filtered from the temporary file. Temporary files are saved in the
user's home directory. If the standard input to maildrop is a file,
and not a pipe, a temporary file will not be necessary.
maildrop checks the syntax of the mail delivery instructions the
filter file, before attempting to deliver a message. Unlike procmail,
if the filter file contains syntax errors, maildrop terminates without
delivering the message. The user can fix the typo without causing any
mail to be lost.
Installation
See INSTALL for installation information. If you are using an
RPM-based Linux distribution, you can install build a binary RPM
directly from the source code.
Using maildrop with sendmail
Maildrop can be easily used as sendmail's local delivery agent,
instead of procmail. Here is the suggested entry for sendmail.cf,
courtesy of Eric J. Schwertfeger <ejs@bfd.com>:
Mlocal, P=/usr/local/bin/maildrop, F=lsAw5:/|@SPfhn, S=10/30, R=20/40,
T=DNS/RFC822/X-Unix,
A=maildrop -d $u
You may also consider including the D, F, and M flags as well.
Other Links
SuSE RPMs of maildrop
Revision history (including development versions)
Change Log
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