Re: Fwd: New Version Notification for draft-crocker-email-deliveredto-05.txt

On Fri, Aug 13, 2021 at 08:09:06PM +0200, Alessandro Vesely wrote:

> Also MUAs can take advantage of any mailbox values found there, as a
> sponger.  For example, Thunderbird has a configuration item named
> catchAllHeaders which can be set to a list such as "envelope-to,
> x-original-to, to, cc, delivered-to".

The "Delivered-To" header is NOT for MUA consumption.  Any MUA using
"Delivered-To" for anything other than display to the user as diagnostic
information is violating the contract, and deserves whatever
misbehaviour ensues when it seems something new and/or unexpected.

-- 
    Viktor.