You could, but now we're back to whether we believe that list managers
act to keep crud out of their lists. In general, I observe that they
do, so I don't see any point to adding features that assume that
managers will just sit there and allow subscribers to abuse their
lists.
This sounds a lot like what ATPS turned out to be, except that it didn't
give much thought to replay protection. Maybe we can build on that instead?
I'd rather stick with the whitelists, since they can solve more problems
than the various signtature-transit hacks can.
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
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