2002-08-02-21:45:37 Graham Hillstomer:
> Ok, what would be the general opinion of the audience here as to
> the most reliable SPAM filter?

I can't help with "most reliable", since I've not applied very many
different solutions. I settled on Junkfilter[1] some years ago, and
it works quite well for me. I keep meaning to migrate my whole email
filtering to maildrop, which would require that I translate
Junkfilter, haven't quite gotten around to it somehow.

Junkfilter has the highest catch rate (often in my experience
exceeding 90%), and the lowest false-positive rate (a few false
positives a month, despite pulling aside 20-50 spam messages a day),
of any solution I've tried.

If you want to offer a powerful spam filtering solution as an MTA
plug-in, groovy, but it'll need to be a subscription service; spam
blocking tools need active updating, it's an arms race out there.

And I've never seen or heard of a spam-blocking strategy with a very
high catch rate that doesn't have a non-trivial false-positive rate,
so I strongly recommend confining MTA activities to marking the
mail, adding a header, to assist users in their own choice of filing
efforts.

-Bennett

[1] <URL:http://junkfilter.zer0.org/>

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