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Re: [dmarc-ietf] From: rewriting, was Email standard revision

Dave Crocker <dcrocker@gmail.com> Sat, 30 November 2019 15:37 UTC

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To: Alessandro Vesely <vesely@tana.it>, dmarc-ietf <dmarc@ietf.org>
Cc: John C Klensin <john@jck.com>
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From: Dave Crocker <dcrocker@gmail.com>
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Date: Sat, 30 Nov 2019 07:37:04 -0800
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Subject: Re: [dmarc-ietf] From: rewriting, was Email standard revision
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On 11/30/2019 4:40 AM, Alessandro Vesely wrote:
> Let me quote this from the ietf-smtp mailing list:
>
> On Sat 30/Nov/2019 00:12:53 +0100 John C Klensin wrote:
>> --On Friday, 29 November, 2019 11:16 -0600 Pete Resnick wrote:
>> [...]
>>> Even the "From: rewriting" issue is
>>> a gatewaying issue, not a message format issue per se.
>>>
>>> That is less clear.  It fits into the gray area that has existed
>>> for years about just exactly what a mailing list exploder /
>>> redistribution system really is.


This view is reasonable only if one re-defines accepted terminology and ignores some basic technical facts.

A user specifies a recipient address. The message is posted and then 
delivered to that address.

That simple process describes basic email handling, and has been the 
accepted view for roughly 40 years.

And it describes the /first/ leg of a message sent /through/ a mailing list.

For the second leg, a bot at that address /re-/posts the message.  In 
simple, formal email technical terms, this is an entirely new email 
transaction.

It isn't 'gatewaying' per se, since that term applies to transit between 
heterogeneous systems, but it /is/ a higher-level process.

If only we had a document that discussed all this coherently, defined 
basic terminology, and had undergone IETF review and approval.  If only 
we had RFC 5598...


d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net

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