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Re: [ietf-dkim] RFC4871 5322.From Binding - Proposal to relax it.

2010-09-16 13:18:45
Murray S. Kucherawy wrote:

Neither class of extension is a statement by us that extensive 
field operations has yielded this as a flaw in the protocol or 
a required extension.  Absent a statement by this other open 
source project to that effect, I would just assume it's another 
knob people can try.

True, but...

A MUST does not mean optional.  Most good implementators will always 
begin by following the MUST specs to the letter and most will never 
implement a MUST as a SHOULD or MAY (thus make it a local policy 
option) unless absolutely necessary, and if its necessary to explore 
it is done in a low key manner.

Since we all agree the 5322.FROM is extremely important and MUST be 
bound to the signature, any reason to make this an option after 3-4 
years of implementation is a very significant DKIM Project Research 
data point especially when done by a large commercial MTA.

PS: The request has already been made to get the specifics on the 
implementation change.

-- 
Hector Santos, CTO
http://www.santronics.com
http://santronics.blogspot.com


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