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I finally think I have arrived at a good approach to spam elimination
here. Using a combination of DNSBL's and the local access file in sendmail
I have my daily spam down from roughly 300 messages to a trickle of one or
two. I had a slight problem with a sendmail rule that I have corrected
that was rejecting some legitimate mail. I am using no filtering software.
All spam is rejected. I use the approach characterized by this statement I
found at a spam elimination site on the web:
<quote>
I don't do any kind of content analysis: I'm in agreement with Paul
Vixie on this one: either people share our values or they don't. If they
do, then they don't allow spam to flow out of their networks (at any rate
beyond a trickle, which is probably inevitable). If they don't, then
they're either actively supporting spammers or incidentally supporting
them through neglect and incompetence -- and the reason doesn't really
matter to me, my users, my systems or my networks.
More succinctly: systems and networks which emit spam are broken and
should either be repaired immediately or physically disconnected from
the Internet until they are.
More bluntly: I'm not going to waste my resources trying to sort out clean
water from sewage. That responsibility rests with the people whose servers
and networks are spewing effluent through the pipes designated for water.
<end qoute>
Filtering is a waste of energy and does not fight the root cause. If
anyone wants to read more about this a good place to start is here:
http://sunportal.sunmanagers.org/pipermail/summaries/2004-July/005565.html
I feel it is very important that we stop routing this stuff. The links
include some lists of IP's and domains that are strictly spam and should
not be routed.
Doug
****************************
* Doug Crompton *
* Richboro, PA 18954 *
* 215-431-6307 *
* *
* doug@crompton.com *
* http://www.crompton.com *
****************************
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