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Re: incorrect spam setups cause spool messes on forwarders
Randy Bush writes on 12/1/2003 1:50 PM:
They haven't yet determined that it is spam. So, RFC nitpicking wise, they are right.interesting but utterly irrelevant. the question was not how verison decided it was spam. the point was that their server returned a 450 as opposed to a 5xx (550 looks good), and this causes net damage.
On the other hand, from a mail operations standpoint, I personally feel that sender verification, graylisting and other methods that rely on 4xx'ing email are a bad idea, as they makes things inconvenient for a whole lot of ISPs ... and because these emails have to be either 5xx'd or trashed sometime sooner or later.
srs (postmaster|suresh)@outblaze.com // gpg : EDEDEFB9
manager, outblaze.com security and antispam operations