Stuart D. Gathman writes:
(Yes, SPF checkers should delete any prior Received-SPF header if they
don't add their own at the top.)
No, they should not. SPF is a per-hop function, and the record of
what happened at prior hops should be preserved.
Of course, you can do whatever you please to mail that's inbound to
your own domain(s), and this is where SPF is most often checked.
There's no rule against shooting yourself in the foot.
--
Dick St.Peters, stpeters(_at_)NetHeaven(_dot_)com
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