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

On 8/6/2021 11:28 AM, Viktor Dukhovni wrote:
>> Why use one field that is sufficient when we can pretend two are needed?
> Well, Envelope-To: records the envelope address as received from upstream,
> e.g. in the "RCPT TO" command.  While "Delivered-To:" is some internal
> representation of the receiving mailbox for loop detection.
> 
> The former can be expected to match a usable email address as specified
> in the incoming envelope.
> 
> So the two are in fact semantically distinct, even when they happen to
> coincide in the absence of rewrites, hashing, ...


Please explain how the current deliveredto draft does not satisfy these 
uses with a single field.

d/
-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net