But I guess I could live with it if the consensus moves this way, but to me that seems only because I know the MUST NOT will be violated.
At first I bristled at John's proposed change, but he's right that RFC 5321 is completely clear on this topic, and it is a full standard. And, yes, lots of SMTP applications probably violate the MUST NOT as well, but that doesn't change it.
In my experience, people who write mail software understand the opaque mailbox rule, and try pretty hard to follow it. Some cheat and do case folding to match Bob@domain to BOB@domain, but I can't think of any that match bob+foo@domain or b.ob@domain to bob@domain, other than the MTA that actually knows what the addresses mean.
I can't emphasize strongly enough that any design that depends on people guessing addresses is fatally flawed. If, as you're saying, this one does, it'll just be kicked back until it's redesigned to take out the need to guess.
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
