Summary: How to avoid spam mail (revisited)

Thanks to many people who responded.
Most recommended looking up the following websites:

Use procmail at 
http://www.procmail.org

There are some spam avoidance code examples at 
http://www.sendmail.org 

Spam Prevention Early Warning System:
http://www.spews.org/

Spam Cop Blocking List information:

http://spamcop.net/fom-serve/cache/294.html

After the summary was posted, Richard Bond,
and Thomas W. Holt, Jr were kind enough to mention 
that Spam Assassin (tm) worked very well for them.

Spam Assassin is available at:

http://www.spamassassin.org

One can look at past Spam Assassin archives at:

http://www.geocrawler.com/lists/3/SourceForge/11679/0/

or subscribe to the Spam Assassin mailing list at:

http://lists.sourceforge.net/lists/listinfo/spamassassin-talk

Last but not least, there is a bunch of anti-spam
procmail links (as suggested by Fabrice Guerini which
is very useful:

http://www.ling.helsinki.fi/users/reriksso/procmail/links.html#antispam

Tony
Yahoo! - Official partner of 2002 FIFA World Cup
http://fifaworldcup.yahoo.com