Howtoforge posted an article about installing DSPAM & ClamAV with Postfix (Virtual Users) on Debian GNU/Linux 4.0

This article describes how to integrate DSPAM with embedded ClamAV into a mail server based on Postfix featuring virtual users and domains, i.e. users and domains that are in a MySQL database. DSPAM is a scalable and open-source content-based spam filter. The setup shown here is suitable for Debian Etch servers.

Using DSPAM & ClamAV With Postfix (Virtual Users) On Debian Etch