On Wed, 10 Dec 2003 11:38:59 -0500, Stephen M. Przepiora
<[EMAIL PROTECTED]> posted to spamassassin-talk:
 > Almost all spam comes through with a url to click on, or a url to load
 > an image from. Most spammers have multiple domains they use, and
 > rotate through them. We match these domains and add a 2 to the score.
 > I can not stress enough how effective this is. It cuts down the spam
 > down from 100-200 a day to 2-3 a day per user (obviously some users do
 > not get quite as much).

Why don't you put these in your own little DNSBL and figure out how to
maintain that instead? It would also make it easier to share with us
others -- what you have sounds like a useful resource.

There used to be a DNSBL called something like "conduits of spam"
which would blacklist domains who hosted click-throughs, but it never
caught on. Maybe now the time is ripe.

Then you'd only need a single rule, although probably you'd have to
construct your own eval:() stuff for extracting URIs and querying the
DNSBL with a suitably normalized URI (remember DNSBLs are basically
operating on domain names so you would need to squeeze URIs into what
DNS can handle).

16,000 SpamAssassin rules doesn't sound very manageable in any event
so perhaps you should at least think about other ways to handle this.

/* era */

-- 
The email address era     the contact information   Just for kicks, imagine
at iki dot fi is heavily  link on my home page at   what it's like to get
spam filtered.  If you    <http://www.iki.fi/era/>  500 pieces of spam for
want to reach me, see     instead.                  each wanted message.



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