[ietf-dkim] THIS IS A MULTIPLE 5322.FROM MESSAGE

[J.D. Falk]

On Oct 6, 2010, at 1:22 AM, Murray S. Kucherawy wrote:

>> -----Original Message-----
>> From: ietf-dkim-bounces at mipassoc.org [mailto:ietf-dkim-bounces at mipassoc.org] On Behalf Of Mark Delany
>> Sent: Tuesday, October 05, 2010 8:06 PM
>> To: ietf-dkim at mipassoc.org
>> Subject: Re: [ietf-dkim] THIS IS A MULTIPLE 5322.FROM MESSAGE
>> 
>> There was an assertion in RFC4780 about "conforming emails" that must
>> only have a single 2822.From header. That got lost in the translation
>> to 4781 I guess. Unfortunately, 4780 failed to specify what
>> "conforming" means explicitly.
>> 
>> I also know that this WG has repeatedly stated that messages that are
>> not within standard MUST fail verification.
>> 
>> That this is not in 4871 seems to be mostly a WG assumption that
>> should be made explicit.
> 
> I think several of us thought it was in there, but on review it apparently was indeed lost somewhere along the way.  We've certainly, as I understand it, been proceeding from that assumption for a very long time.
> 
> I like the idea of saying so explicitly in 4871bis, and applying it both to signers and to verifiers.

+1

> I don't like the idea of being any more specific than that.  That is, I don't want to create specific text for specific cases we know about because that means anything we don't list could be perceived as less critical.  A blanket admonishment to implementers is sufficient and appropriate.

+1