I looked to procmail to filter spam too, but I found a solution which takes care of all of that by using MailScanner (http://www.mailscanner.info) This program uses other tools to scan for viruses and spam (dangerous content), is quick and has low overhead. It integrates all these programs that you never know you have so many tools working together. So with MailScanner, I am also using:
a) SpamAssassin 2.63 (www.spamassassin.org) - using the RPM's available there
b) Active Spam Killer 2.4.1 (www.paganini.net/ask/) - a challenge/confirmation system.
c) ClamAV 0.65 (www.clamav.net) for virus scanning
d) MailWatch (mailwatch.sourceforge.net) - web frontend for MailScanner (very cool!)
I had been running just Sendmail, and was using RBL to filter our spam. I was getting more and more false positives this way, and somehow more and more spam was getting through.
I installed ASK (Active Spam Killer) and instantly, spam was no longer an issue. Users can monitor and configure thier Queue and White/Black/Ignore lists via email. This was a godsend and installed in like 15 minutes!
Then MyDoom hit, some of our machines became virus infected. I had seen MailScanner before, and wrongly thinking that this was a Virus Scanner at the MTA level. I downloaded it and then learned that it was so much more. Excited about it, I had it installed and running in about an hour (including SpamAssassin!) I then downloaded and installed ClamAV, set it up to auto update every few hours.
I then learned of MailWatch (I don't remember where) and downloaded and installed this. This is great because now I can monitor incoming mail and see that MailScanner is actually working. With it, you can teach SpamAssassin what is or is not Spam and this has really helped. MailWatch is really worth having.
The whole system was a breeze to set up. Maintaining it is even easier. I don't know how we got by without it. Needless to say, I have ditched the RBL system altogether.
Kind regards,
Craig D.
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Craig Daters (craig@xxxxxxxxxxxxx) Systems Administrator West Press Printing 1663 West Grant Road Tucson, Arizona 85745-1433
Tel: 520-624-4939 Fax: 520-624-2715
www.westpress.com
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