amdavidson

Configuring Postfix, Courier, and Courier-Maildrop for Virtual Users

posted on 2009-03-23 - amd.im/u27r

Here are some highlights for configuring Postfix to use Courier-Maildrop for local delivery.

This allows some advantages over just having postfix deliver, because you can do server-side filtering of spam and mailing list messages to de-clutter your inbox.

All these notes are based on configuring the setup on Ubuntu 8.10 (Intrepid Ibex) with Debian Lenny's courier-maildrop

The following are snippets from my configuration files, highlighting the changes that I had to make, from an already existing mail server. If these look unfamiliar, or you need more assistance setting up the basic framework of a Postfix + Courier-IMAP mail server, start here.

/etc/courier/maildroprc:

EXTENSION="$1"
RECIPIENT=tolower("$2")
USER="$3"
HOST="$4"
SENDER="$5"
DEFAULT="/home/vmail/$HOST/$USER/."

/etc/postfix/main.cf:

virtual_transport = maildrop
maildrop_destination_recipient_limit = 1

/etc/postfix/master.cf:

maildrop unix   -       n       n       -       -       pipe
flags=ODRhu user=vmail argv=/usr/bin/maildrop -w 90 -d ${user}@${nexthop} ${extension} ${recipient} ${user} ${nexthop}

So if you have a working mail server: make these changes, sudo /etc/init.d/postfix restart, and then get to work writing your .mailfilters!