You appear to be making the naive assumption that every SPF record is
correct, or worse, that whatever the SPF record must be correct even if
it's not what the system manager intended, or it doesn't describe the
domain's actual mail.
In reality, nearly every SPF record is wrong, because SPF's simple model
of mail transport cannot describe all the ways that people send mail. A
competent mail system manager will deal with that, rather than imagining
that he can force the rest of the world to change.
As I have said many times, my goal is to deliver the mail that my users
want. SPF, DKIM, and DMARC are all useful, but I do not make unilateral
decisions based on what any of them say. Having talked to the people who
run many of the world's largest mail systems, I can assure you that they
don't either.
Regards,
John Levine, jo...@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly
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