"In this article, I'm going to trace email through the various
parts of a Postfix mail server running Dspam and Procmail or
Maildrop, focusing on getting the CGI quarantine working correctly.
I'll provide the configuration steps for local users. I'll also
explain where the configuration differs for virtual users, and the
basic changes or decisions that you need to consider, but I won't
provide the actual configuration for virtual users in this