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.

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!

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

Here is the process I took to install Spamassassin as a daemon working with Postfix to process incoming mail.

I’ll also be trying to reduce the memory footprint while still getting acceptable performance. Mind you, this is being implemented on a low volume server, so these settings may not be applicable to a production server with lots of users.

First, let’s do some prep work

Now edit /etc/default/spamassassin and change the lines below

Edit /etc/spamassassin/local.cf

Now edit /etc/postfix/master.cf and change it to look like this:

Now reboot some stuff

Now test by sending email to yourself. If you view the full headers it should now have X-SPAM headers in it.

If you send an email with “XJS*C4JDBQADN1.NSBN3*2IDNEN*GTUBE-STANDARD-ANTI-UBE-TEST-EMAIL*C.34X” in the body of the email, it is guaranteed to be flagged as SPAM, and is a great way to test your spam filter.

If you cannot install the nokogiri gem on ubuntu (required or recommended) for Mephisto.

You have to install two other libraries first that may or may not already be installed on your computer:

Simply installing libxml-ruby or libxml1 won’t satisfy the requirements.

Thanks to hightechsorcery.com for the info.