[Mimedefang] Adding support for learning our addresses

[Gary Funck]

> From: David Nelson
> Sent: Saturday, January 28, 2006 9:13 AM
> 
> I subscribe to ip2location.com, which provides geolocation services by
> IP address.  The info is downloaded on nightly from their web servers
> and put into a database.  I check the IP addresses contained in the
> message against the database and if it's from a foreign country, I block
> it.

We use spfilter to build a large sendmail access list file:
http://sourceforge.net/docman/display_doc.php?docid=14634&group_id=49927
We run it nightly to update the access list, and then rebuild access.db.
Spfilter can produce the lists in many different formats.

Here's the block lists currently available:
http://spfilter.openrbl.org/code/xml-view.php
We run with SPAM_SAFE,COUNTRY,CBL as well as our own local overrides.