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Re: excessive bounces

From: Bob Friesenhahn
Subject: Re: excessive bounces
Date: Thu, 27 May 2004 11:58:15 -0500 (CDT)

On Thu, 27 May 2004, Lars Hecking wrote:

o has a prohibitively high volume of email, and SA/Bayes require
  massive resources. Therefore, the volume of mail going through SA or
  any other tool must be limited.

Bogofilter does a fine job of Bayesian filtering and is 50-100X faster than SpamAssassin. Surely it does not offer the extra features of SpamAssassin, but using it would help considerably, and should keep up with performance requirements.

o Excessive whitelisting: all current subscribers should be white-
  listed, so that their email bypasses anti-spam. Yes, that'll still leave
  the problem of subscribed spammers, but I believe there won't be too many.

This does not work at all. A huge amount of email I receive are bounces or anti-SPAM notices from forged emails sent using my address. More than likely I have received many SPAM emails claiming to be from Lars Hecking. :-)

o Ruthless use of DNS blacklists before mails reach anti-spam. Most of
  spam on GNU lists originates from "known bad boys" - Korea, China,
  dialup/dyn-ip hosts, Comcast, *bell etc. Recommended reading: alone would probably work wonders.

Usually this is good, but lately I have been noticing that substantial email is arbitrarily rejected due temporary local DNS issues or bugs. It is not pleasant to be on the wrong end of this.

Bob Friesenhahn

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