> However, after a few years of tinkering, I
> did realize that (at least based on messages
> received by my mix of business clients) *I*
> was able to use some tests to outright delete
> 13% of all incoming mail (an additional 50%
> gets deleted by weight):

> BLITZEDALL DELETE
> NJABLPROXIES DELETE
> AHBLPROXIES DELETE
> SORBS-HTTP DELETE
> SORBS-SOCKS DELETE
> SORBS-MISC DELETE

> MAILFROM DELETE
> PERCENT DELETE

Not meaning to open any old wounds, Andy, but I thought I'd chime in and
share what is working for me, too.

I only use a DELETE action as a reaction to something very, very specific.
For example, my home-made SoBig.F filter when for a short time, we were
receiving a ton of obvious bounces and virus notices from other companies
that were getting faked headers with our domain name as the return address.

I don't trust any 3rd party to definitively and automatically HOLD a message
on its say-so alone, so I certainly wouldn't delete on that same say-so.  At
the very least, a delete action robs me of a way to check up on the
"rightness" of the test.

I balance my hold action with a decision of how long is reasonable to hold
before the infromation has expired anyway and how much disk space I'm
willing to spend.  For me, that's 7 days.

I have a little .VBS script that I picked up from the Declude Tools web page
(actually points to posts here) that runs every night to delete the expired
stuff.  Somebody else, I just checked who (Chuck Frolick), contributed a
nifty script to rotate the \imail\spool\spam folder so that you had an
arbitrary day rotation, with a separate folder for each day.

If I wanted to play it close, I might give XBL-DYNA a DELETE weight.
Generally, I've been happy with the tests you cited, except for AHBL which
I've implemented with a low weight until I have time to pay attention to it
specifically.  I've seen false positives with the others, including PERCENT,
which rather than being an open relay "hack" was the notation used by a
company using Lotus Notes on multiple platforms.

Andrew 8)
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