Re: Experimental (was: Re: homework, not an experiment, draft-crocker-email-deliveredto)

> On 17 Aug 2021, at 5:37 pm, Murray S. Kucherawy <[email protected]> wrote:
> 
> I would like to take this opportunity, given the number of implementers in the room (guten tag, Claus!), to ask:
> 
> Hypothetically, if this work were to take the path of declaring a new code point for this purpose, what's the likelihood of adoption?
> 
> Please note "instead of or in addition to" in the sentiment above.

Perhaps, but first it'd have to be clear what "this purpose" means.

  - Standardise "Envelope-To"/"X-Original-To" that records the public input address
    that led to the recipient, thus unifying a common feature of Exim/Postfix/...

  - Standardise a variant of "Delivered-To" for consumption by downstream MUAs that
    is not MTA-private for loop detection, but rather a commitment to record the
    actual delivery address and not "some opaque token" (that often happens to be
    the delivery address)?  If so, what's the use-case?  Who needs this, and what
    are they going to do with it that would motivate implementation?

  - Something else?  For what audience, and why?

-- 
	Viktor.