mholm(_at_)medrad(_dot_)com wrote:
I expect he is right and I got it wrong.
That's not the case. It's one of the few hard MARID results,
that Sender-ID cannot abuse existing v=spf1 sender policies,
because it's semantically different and incompatible. That's
why they switched to spf2.0/pra for PRA, and after PRA failed
in the "internal last call" the essential part of classic SPF
was added as spf2.0/mfrom.
Many domains will not experience problems from the use of
their spfv1 records by SenderID.
Almost all domains would suffer badly from the abuse of their
v=spf1 records by Sender-ID, unless they stay away from many
mailing lists, moderated newsgroups, broken MTAs, well behaved
MSAs enforcing submission rights without modifying the DATA,
forwarders implementing SRS, and other potential problems.
Bye, Frank