Julian Mehnle wrote:
If the sender identity has failed an authentication check
(SPF or other means), the bounce is misdirected.
Therefore "misdirected" is defined by e.g. a SPF FAIL policy.
If no check has been performed on the> sender identity, it
_might_ be authentic, but sending a bounce would be grossly
negligent due to the identity's unverified nature.
Rejecting mail to non-existent or over-quota users is simply
SMTP. And reporting corresponding bounces as "misdirected"
without a say SPF FAIL policy is clueless.
That's exactly what SpamCop allows, and as I said it's dubious,
because it indirectly propagates the easy way "kill silently"
instead of publishing / checking SPF FAIL policies. Bye, Frank