In the PMTA draft I offered the same locator approach as SMIMEA, however also mention that that is one of many possible means for locating the record. It is not hard to image use cases in which a recipient would want to expose multiple payment associations that don't necessarily correspond to a mailbox.
There's two separate questions here -- one is what name to use in the DNS, and the other is what sort of RR to put there. My point is that if the name corresponds to a hashed mailbox, the sensible name is <hash>._mailbox.domain, regardless of what RRs one uses. If you want to publish PMTA records that don't correspond to a mailbox, that's no problem, use the same record with different names. For obvious reasons, it would not be great to have some _pmta names being mailboxes and some being something else.
Do you feel IBAN should be an exemplar?
Yes, both because it's very widely used, and it brings in the important issue of payment systems that handle multiple currencies. I think you'll find that ACH and Bitcoin are fairly unusual in that they are each single currency.
Regards, John Levine, [email protected], Taughannock Networks, Trumansburg NY Please consider the environment before reading this e-mail. _______________________________________________ dane mailing list [email protected] https://www.ietf.org/mailman/listinfo/dane
