Spammers Skirt IP Authentication Attempts

Mon Sep 6 17:45:00 UTC 2004

On Mon, 6 Sep 2004, Peter Corlett wrote:

> I'm an advocate of SPF, but not because it's the magic bullet that 
> stops spam. It does however allow innocent domains to say "no, I 
> didn't send that" and thus avoid the double-bounced backwash from a 
> spammer forging their domain as the sender.

Envelope "cookie" schemes on outbound email, like SRS, can achieve 
that, far better (*you* know whether the bounce is legit, rather than 
relying on the bouncer to do the checking) and without the collateral 
damage of SPF.

regards,
-- 
Paul Jakma	paul at clubi.ie	paul at jakma.org	Key ID: 64A2FF6A
Fortune:
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Film at 11:00.