On Tue, 28 Apr 2020, Dave Cridland wrote:
> RFC 4954 says that it defines a service extension for SMTP, not Submission. > It does say the extension is appropriate for Submission, but makes no > suggestion that this is any kind of defining factor. Equally, RFC 6409 does > not mandate SMTP-AUTH, but does refer to it as exactly that name.
That's what it's called, but I can promise you that in 100% of the many mail sytems I have looked at, if you authorize, you're doing submission.
Then you haven't looked at a bunch of ours. Authenticated relay isn't routinely done, but it's by no means unheard of, and we fully support it. Ned
