Re: homework, not an experiment, draft-crocker-email-deliveredto

On 8/6/2021 11:45 AM, Viktor Dukhovni wrote:
>> On 6 Aug 2021, at 2:37 pm, Dave Crocker <[email protected]> wrote:
>>
>> Please explain how the current delivered-to draft does not satisfy these uses with a single field.
> 
> If an MUA wants to learn the envelope recipient address to which the
> message was sent (by the immediate upstream MUA or relay) then Delivered-To
> is not the right header for that.  That's why Exim has Envelope-To, while
> Postfix has "X-Original-To:", both of which are intended for consumption by
> tools like fetchmail.

So you are saying that it is not possible for one Delivered-To to show 
the actual address it has been delivered to, followed by another 
Delivered-To that shows a local transformation to an internal delivery 
string?

Or are you saying that Delivered-To has nothing to do with delivery?



> The draft as written does not preclude the present use of Delivered-To, but
> its "Experimental" status still makes no sense to me,

1. That's irrelevant to the current issue.

2. It's been explained.  Please refer to my earlier note that provides 
quite a bit of detail for that explanation.


d/

-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net