I believe that Brandon has specifically said that Gmail sees this problem
and that is why whitelisting mail from mailing lists isn't adequate.
And that constitute "meaningfully document[ing]"?
Works for me. I doubt I was the only person wondering why it needed all
that mechanism when whitelisting mailing lists got you most of the way
there, particularly since you need that whitelist anyway to know when to
start ARC analysis.
And, again, when ARC work was pursued, I don't recall anyone claiming that
mailing lists were (significant) sources of misbehavior.
Well, OK. Please feel free to provide footnoted documentation of what
the actual motivation for ARC was if you believe it was something else.
R's,
John
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