Resources
For further reading and research, I recommend the following websites
and mailing lists:
Procmail:
- Procmail FAQ: http://www.iki.fi/~era/procmail/
- The procmail mailing list archive:
http://www.rosat.mpe-garching.mpg.de/mailing-lists/procmail/
Spam:
- The Official SPAM-L FAQ: http://www.ot.com/~dmuth/spam-l/
- Fight Spam on the Internet: http://spam.abuse.net/