mdsort

The mdsort(1) utility moves messages from one maildir to another according to a set of rules expressed in the mdsort.conf(5) format.

Example configuration:

$ cat ~/.mdsort.conf
inbox = "~/Maildir/INBOX"

maildir "${inbox}" {
	# Move messages from OpenBSD mailing lists into dedicated directories.
	match	header { "Cc" "To" } /(bugs|misc|ports|tech)@openbsd.org/i
		move "~/Maildir/openbsd-\e1"

	# Label messages with the plus portion of the address.
	match header "To" /user\e+(.+)@example.com/l label "\e1"

	# Conditionally move to a maildir named after the plus portion of the
	# address.
	match	header "To" /user\e+(.+)@example.com/l and
		isdirectory "~/Maildir/\e1"
		move "~/Maildir/\e1"

	# Extract calendar attachments.
	match all attachment {
		match	header "Content-Type" |text/calendar|
			exec stdin body "icalendar2calendar"
	}

	# Archive read messages.
	match ! new move "~/Maildir/Archive"
}

maildir { "~/Maildir/Junk" "~/Maildir/Trash" } {
	# Delete messages older than 2 weeks.
	match date > 2 weeks discard
}

Invoking mdsort(1) with the -d option shows which messages would be moved and why, leaving the maildir(s) unchanged:

$ mdsort -d
/home/anton/Maildir/INBOX/new/1521917775.89020_21.host -> /home/anton/Maildir/mdsort/new
~/.mdsort.conf:3: From: Charlie Root <notifications@github.com>
                                      ^                      $
~/.mdsort.conf:4: Subject: mptre commented on pull request mptre/mdsort#1337
                                                                 ^    $

In addition, mdsort(1) can also act as a MDA reading messages from stdin:

$ cat ~/.mdsort.conf
stdin {
	match all move "~/Maildir/INBOX"
}
$ mdsort - <message

Installation

OpenBSD

# pkg_add mdsort

From source

The installation prefix defaults to /usr/local and can be altered using the PREFIX environment variable when invoking configure:

$ ./configure
$ make
$ make install

License

Copyright (c) 2018-2024 Anton Lindqvist. Distributed under the MIT license.