On Sat 12/Apr/2025 09:52:21 +0200 Dave Crocker wrote:
On 4/11/2025 12:57 PM, Richard Clayton wrote:
The term forwarding is ambiguous. It is used to mean very different types of
behavior.
*If 'forwarding' means every MTA, this is a massive infrastructure
change to the entire Internet Mail service. *
If it only means Intermediaries/mediators that sit between a delivery and a new
posting, such as mailing lists, then it has the same adoption barriers as ARC,
which has proved challenging.
We mean all the devices between a submission server and the machine
which does final delivery.
Ahh. So the adoption barrier is much, much worse than for ARC. It is literally
every piece of the global email transit infrastructure.
That confusion affects ARC as well. Those who use it produce a series of ARC
sets, one for each internal hop, which make little sense. There should be one
ARC set per ADMD. I guess the same holds for DKIM2.
Best
Ale
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