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Re: [ietf-dkim] detecting header mutations after signing

2010-10-08 11:32:14
-----Original Message-----
From: ietf-dkim-bounces(_at_)mipassoc(_dot_)org 
[mailto:ietf-dkim-bounces(_at_)mipassoc(_dot_)org] On Behalf Of Alessandro 
Vesely
Sent: Friday, October 08, 2010 8:34 AM
To: ietf-dkim(_at_)mipassoc(_dot_)org
Subject: Re: [ietf-dkim] detecting header mutations after signing

The whole discussion on multiple "From"s then boils down on whether it
is worth to change the protocol so that, for example,
"h=from:subject:date:message-id:to" MUST be interpreted by the
verifier to mean
"h=from:from:subject:subject:date:date:message-id:message-id:to:to", a
handy abbreviation for known fields.

I'm still cringing at the layering violation of "fixing" in DKIM the fact that 
many RFC5322 implementations, MTAs, MSAs and MUAs alike, don't bother to 
enforce normative portions of that specification.

Is there precedent of this being done elsewhere, i.e. compensating in one 
protocol for abundant lousy implementations of a layer below it?


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