On Dec 27, 2019, at 1:42 PM, John C Klensin <john(_at_)jck(_dot_)com> wrote:
It seems that the -02 has not yet been uploaded, did you mean
for it to be already available?
Sorry... meant -01. Been thinking about and working on -02 too
much. It should be up in the next couple of hours.
Thanks, I see it now. Thanks for including the "552 -> 442" issue,
I'd also like to see a similar placeholder for clarifying the semantics
of a "554" greeting. Is the client expected to immediately bounce the
message, or look for a better MX host? The spec is not clear and
Past behaviour by some MTAs (returning a 554 banner under load) made
the second choice more appropriate, but I've not seen recent reports
of whether that's ongoing.
More recently some users are running into policy-based 554 greeting
rejects, and don't want to keep retrying message that will be
I'd like to know which is the expected client behaviour, and which
is a work-around for particular unexpected circumstances a client
ietf-smtp mailing list