You appear to be asking recipients to distinguish among legit directly
sent paypal transaction mail, legit paypal mail that comes through
known-to-be-real mailing lists, and any other paypal mail that is
presumably illegitimate.
Nope. I'm suggesting a means for enabling DKIM authenticated mail to
survive transit through a mail list and arrive with the
intent/purpose/value of the original authentication might be for MLM's
to validate incoming mail and DKIM sign their own outbound mail along
with the appropriate A-R data. That's all.
But you haven't offered any plausible benefit from doing so, other
than to let you mix your two mailstreams. As I've said about a
bajillion times, we have 40 years of list management history, and this
isn't a problem that anyone has ever needed to solve. So I'll leave
it there.
R's,
John
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