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Re: [ietf-smtp] Fwd: New Version Notification for draft-crocker-email-deliveredto-00.txt

Valdis Kl ē tnieks <valdis.kletnieks@vt.edu> Fri, 05 February 2021 21:44 UTC

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Date: Fri, 05 Feb 2021 16:44:25 -0500
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Subject: Re: [ietf-smtp] Fwd: New Version Notification for draft-crocker-email-deliveredto-00.txt
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On Fri, 05 Feb 2021 11:56:55 +0100, Alessandro Vesely said:

>     The Delivered-To: header field is added at the time of delivery, when
>     responsibility for a message transitions from the Mail Handling
>     (Transport) Service to an agent acting on behalf of the specified
>     recipient address.

It's a plausible design that the agent doing final delivery accepts
responsibility for delivery to multiple local mailboxes (I've often had things
that ended up delivering to root@localhost and valdis@localhost with one
invocation of the local delivery agent, for example).  Should the agent
generate two Delivered-To: headers, or does it *actually* get generated
appropriately for each copy (at a time later than when the agent accepted
responsibility)?

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