On Fri 30/Jan/2026 17:22:16 +0100 Trent Adams wrote:
Concluding the ARC Experiment
(draft-adams-arc-experiment-conclusion-01)
https://datatracker.ietf.org/doc/draft-adams-arc-experiment-conclusion/
I agree with Seth that ARC could be useful. The fact that it hasn't been
widely implemented yet seems to be due to a lack of guidance on how to use it.
Some statements in the I-D sound questionable, such as stating that:
[ARC] must address the uncontrolled nature of forwarding, which spans
countless unknown and dynamic systems, rather than only known
mailing lists or enterprise relays.
What are those uncontrolled elements, beyond mailing lists and enterprise
relays? Dot-forward settings don't arise spontaneously, and usually require
user verification and consent. And the statistics we've seen suggest that "the
mailing list problem" affects a minimal portion of email traffic. Therefore,
if each subscription is managed individually, it is not true that the number of
potential forwarders is so vast and dynamic that maintaining a list is
unrealistic. Simply, no one has said how to do it.
The charter should not assume that ARC's momentum "is believed to be
unsupportable by evidence." Throughout the WG, discussions about ARC usage
have been postponed to allow for the completion of the main documents. Is it
possible to discuss these ideas now?
Best
Ale
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