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Re: 4yz Temporary Rejections is part of the SMTP Protocol

2011-10-30 13:12:00

At 11:56 -0400 on 10/30/2011, John C Klensin wrote about Re: 4yz Temporary Rejections is part of the SMTP Protocol:

 > If the intent is know to issue a maintenance notice, then I
 would probably not activate AUTH. So it becomes:

 S: 220 hi
 C: EHLO me
Independent of the details, switching the set of extensions
offered when the server was effectively unavailable for a while
in the EHLO response is an option that hadn't occurred to me
that that I think makes a lot of sense.

It is IMO also in line with the intent of the EHLO reply in that it documents those extensions that the server is able/willing to support. If the server is currently unavailable, it should only report those extensions that it can support in its current state - In this case that if requested it will report when it expects to be back in operation.

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