It appears that Rob Nagler via mailop <mailop-bp...@q33.us> said: >Require the sender to authenticate the first time via this port through a >challenge-reponse that includes a delay, say, to slow down registrations >further. As to the size of the database, 100K per ADMD is tiny in >comparison to the amount of spam sent to our servers.
If you want reliable identifiation of the sender, tell them to sign the messages with S/MIME or PGP. We already know how to do that. Trusted notifier schemes exist and work to some extent but they have the usual problems of managing reputation at scale, and that any group of people large enough to be interesting includes people who shouldn't be there. R's, John _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
