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

Andrew — Mon, 23 Mar 2009 19:08:46 +0000

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.

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

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#/etc/postfix/main.cf
virtual_transport = maildrop
maildrop_destination_recipient_limit = 1

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#/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!

Intrepid’s courier-maildrop and authlib

Andrew — Mon, 23 Mar 2009 18:29:27 +0000

Ubuntu 8.10’s courier-maildrop is not compiled against courier-authlib and so cannot read from many of the supported authentication schemes that authlib can support.

Fortunately, Debian Lenny’s can. So if you’re having trouble you can try and install the package from that distribution, YMMV.

To save you the effort of going out and locating it, I’ll attach a version of it here. Use it at your own risk, but it’s working for me.

courier-maildrop_0600-2_amd64

andr3w.net » lenny

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

Intrepid’s courier-maildrop and authlib