North American Network Operators Group

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Re: Misguided SPAM Filtering techniques

  • From: Dave Pooser
  • Date: Mon Oct 22 14:32:54 2007

> And that is probably just fine, as 99% of the true spam comes from email
> addresses (and often doamins) that either do not exist, or often are not
> configured to receive email.

I call BS. I ran sender-callout verification on my primary email server for
a while (before I became convinced it was mildly abusive, and stopped) and
typically blocked 2-3 spams per day. In fact, I had more FPs than legit spam
blocked by that method.

> If you didn't send the the email, why bother confirming it?
> Aren't you also adding back to the problem?

Absolutely I am. If you're going to try to offload your spam filtering to
me, I want the process to cause you as much pain as possible (within ethical
limits, which is why I won't forward your email

> Even if you confirm your email address, that's all that spamarrest is asking
> for.  If the email address is valid, then it's done its job.

Sender callouts will verify addresses without requiring any action from the
end user. If you must [ab]use my resources to do your job, please have the
common decency to use my (abundant) hardware and software resources rather
than my (much more limited) wetware resources.
Dave Pooser, ACSA
Manager of Information Services
Alford Media