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Local Spam Filtering Doesn't Solve the Problem
Authored by: el bid on Apr 22, '02 03:58:14PM

Spam is a huge problem, and getting bigger. The culprits, IMHO (apart from the obvious ones) are ISPs who don't care enough to take steps to stop relaying all this stuff to you.

It's the ISPs who have the leverage. They have the tools and knowledge to figure out where this stuff is coming from (nearly always through known open relays already listed at ordb.org or spamcop), and they have the overview that shows when the same email is being directed to thousands of their subscribers.

Standard rules say lodge your complaint with the sending domain. I recommend not doing this unless you feel equipped to distinguish open relays, forged source domains and genuinely responsible ISPs. I recommend forwarding all spam back, with headers expanded to allow full diagnostics, to _your own_ ISP with the question: Your logs will show you this is is just spam -- why are you relaying it to me?

OK, it's not _quite_ as simple as that. But just downloading spam and deleting it locally, whether manually or though an automated filter, doesn't make any any sort of dent in the rapidly escalating deluge.

--
el bid



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