[clug] Mysterious delivery problems
matt at mh.dropbear.id.au
Tue May 20 17:27:49 EST 2003
Martin Pool (mbp at samba.org) wrote:
> So don't use osirusoft's blacklists. There are plenty of other lists
> that don't take so much glee in deliberately creating collateral
I'd go so far as to say don't use blacklists. For some reason they
always seem to be run by very... temperamental... people.
(some may say s/tempera// ;)
I enjoy messing around with email systems and by far the best thing I've
ever done to combat spam was to use a content filtering system. You can
neuter over 80% with a few simple regex's without fear of accidentally
trapping "ham" - which I think is well worth the slight extra CPU cost
in processing (I measured 3-5% on a 400Mhz cpu), and the crafty ones
that make it past that get done by a bayesian filter.
Not sure if I've mentioned it here before, but the trend I'm seeing
right now is that the spam that still makes it (I've gotten 3 from
memory in the past year, one was recently to this list) are
indistinguishable from legitimate human conversation. At most, they are
simply off-topic messages. Extremely ineffective at selling anything,
which means less money and incentive to use spam, and at 3/10,000+
messages, hardly irritating and easily forgotten.
I recently evaluated my spam box (I keep it solely to re-seed the
bayesian filter) and there were no false positives in it. I'm very,
very happy with that.
(and, for the record, I regularly get HTML and HTML-wannabies email from
family and aquaintances using all sorts of stupid clients)
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