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Re: 2821bis AUTH48 fix (?)

2008-08-13 20:32:04



--On Wednesday, August 13, 2008 3:05 PM -0700 Bart Schaefer <barton(_dot_)schaefer(_at_)gmail(_dot_)com> wrote:


On Wed, Aug 13, 2008 at 8:36 AM, Tony Finch <dot(_at_)dotat(_dot_)at>
wrote:
On Tue, 12 Aug 2008, Bart Schaefer wrote:
On Tue, Aug 12, 2008 at 10:07 AM, John C Klensin
<john+smtp(_at_)jck(_dot_)com> wrote:
>
> Any server sending
> back a 4yz or 5yz code in response to a RCPT command is
> outside the spec.

I presume you meant "a DATA command" here.

A server can reply with 4yz or 5yz to DATA too.

Well, yes, but it depends on whether this means immediately
after DATA, or after the final "." at the end of the content.
It would be unusual for a server to respond 2yz for at least
one RCPT and then immediately respond 4yz or 5yz (rather than
354) to DATA; my interpretation of John's statement was that a
server which did so was out of scope for the part of the spec
under discussion.

Unless it did so as one of the "shutting down service" or equivalent messages. I.e., 450 might make sense, other 4yz or 5yz codes would be very unusual. Of course, if there were no valid recipients, even "command out of sequence" (or equivalent) would be plausible.

  john




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