On April 21, 2004 at 10:33 msergeant(_at_)messagelabs(_dot_)com (Matt Sergeant)
wrote:
Stamps buy you nothing in this scenario. ISPs are already free to
reject mail from ISPs they don't like, and throttle their customers to
only be able to send N mails per day.
This adds objectivity to the process, you're sending me mail with
invalid stamps so I dropped it all (either due to counterfeiting or
revocation.)
That's a lot better than "I think you host spammers".
But they don't do it (some throttle, but hardly any reject based on
ISP, unless that ISP happens to be a spammer masquerading as an ISP).
As an ISP perhaps you can answer why they don't do it?
Well, I won't completely agree that hardly any reject based on ISP,
it's not often advertised. But SPEWS for example approached this, so
one could check who used SPEWS.
That said, one concern is collateral damage and the other is lack of
objectivity so one tends to act cautiously before it becomes an
all-out shooting war.
--
-Barry Shein
Software Tool & Die | bzs(_at_)TheWorld(_dot_)com |
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