On 7/18/2014 4:58 AM, John C Klensin wrote:
I believe (in agreement with what this document
just about says) that this mechanism is a back-door workaround
to requiring MX records for any host that is willing to accept
incoming email.
It says and implies no such thing. Nor does it move us towards that.
Suggesting otherwise sounds odd, given that you say you don't object to
the mechanism.
The document formalizes an existing practice. We sometimes do that in
the IETF.
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net