On 4 Aug 2021, at 8:38 am, Dave Crocker <dhc(_at_)dcrocker(_dot_)net> wrote:
I don't see anything in either that prohibits what you've described.
The main thing that's implicit is that MUAs can't generally expect
to find a usable recipient address in the recorded "Delivered-To"
mailbox. This may be true for some operators for some period of
time, but is not a requirement of the field semantics.
--
Viktor.
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