Re: Spam filters

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* Hugo Haas <[email protected]> [2002-04-15 18:13-0400]
> I have changed my spam filtering techniques taking into account the
> new type of spam. I talked to Max who started using SpamAssassin[2]
> and was happy about it. I had a look and found it cool. But I didn't
> want to abandon my whitelist filtering.
>
> I therefore am using 3 different folders:
> - emails identified as spam.
> - emails not identified as spam from people I know (who are on my
>   whitelist).
> - emails not identified as spam from people I don't know.
>
> SpamAssassin works with a scoring system. I use my whitelist to
> decrease the score when somebody is on my whitelist. It is therefore
> easier to be considered as a spammer if the address in not on my
> whitelist.
>
> I have also enabled Vipul's Razor[3] for increasing my detection
> accuracy. When I detect spam which isn't registered in Razor, I do so.

I wanted to give an update an my spam filtering system. With the new
version of SpamAssassin (2.20) and Razor (1.20), my spam filter
catches about 98% of the spam (I lowered the threshold to 3.6 hits and
tweaked a couple of other rules). The 2% of spams that got through
went into my unknown sender folder.

The only non-spam email I saw it catch were bounces from mailing
lists.

In order to make sure that I improve my (and everybody else's) spam
filtering, I systematically bounce spam that went through to
spamassassin-sightings[4] (ESC-B in my Mutt session) and register all
confirmed spam with Razor[5] (ESC-R ; ESC-Z in my Mutt session). This
is easy enough that it just takes a few seconds every day or two.

Basically, I am *very* happy about this new system, and would
encourage people to use it: the more people use Razor and report spams
to it, the less spam we will see.

 4. http://lists.sourceforge.net/lists/listinfo/spamassassin-sightings
 5. http://razor.sourceforge.net/
--
Hugo Haas <[email protected]> - http://larve.net/people/hugo/
Mais alors, tout se recoupe !

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