[CentOS] sendmail and spam

Paul Heinlein heinlein at madboa.com
Wed Jun 4 21:17:25 UTC 2008

On Wed, 4 Jun 2008, Alain Terriault wrote:

> What is todays most effective combination to filter spam ?

We use a three-way combination (on a CentOS 5 base), in this order:

   1. sbl-xbl.spamhaus.org
   2. clamav-milter
   3. spamass-milter (milter-ized spamassassin)

Our server only handles about 50 user accounts, so it's not an 
industrial-strength setup by any means -- though our uptime is well 
above our internal SLA, and most of our employees have a fairly active 
e-mail life. :-)

All bounces happen during the SMTP transaction, so there's no 
backscatter problem.

In a typical week, spamhaus will block ca. 60% of inbound traffic, 
spamassassin 10%, and ClamAV 2-3%. We end up delivering only about 25% 
of the messages we receive from the Internet.

We use rpmforge packages for everything.

Paul Heinlein <> heinlein at madboa.com <> http://www.madboa.com/

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