On 14/Feb/12 18:34, Murray S. Kucherawy wrote:
>> From: ietf.org On Behalf Of Scott Kitterman
>> 
>>>> You are of course correct that SPF failures sometimes don't accept
>>>> the message.  I'd be willing to file an erratum that 2.d. should
>>>> have said that the report MUST include the message if the reporting
>>>> entity has received it.
>>>
>>> I'd support that.
>> 
>> That's great.  Is MUST include if you have ... or SHOULD include
>> (unless you do not have ...) a better construction?  I thought the
>> trend in IETF documents was away from MUSTs if they weren't essential.
> 
> I'd prefer "MUST ... unless" for this one.  I'm not sure I can
> explain why though.

We could get away with "... unless an extension specifies otherwise".

> This one's for Barry: Can a Standards Track document contradict
> another one on the basis of an accepted erratum?  Or should we do a
> quick update to RFC5965 (not a "bis", just a standards-track
> correction)?

IMHO we have to change authfailure-report anyway.  Section 3.1 says:

 The third MIME part of the message is either of type "message/rfc822"
 (as defined in [MIME-TYPES]) or "text/rfc822-headers" (as defined in
 [REPORT]) and contains a copy of the entire header block from the
 original message.  This part MUST be included (contrary to [REPORT],
 which makes it optional).

jm2c
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