Douglas Otis <dotis(_at_)mail-abuse(_dot_)org> writes:
DKIM signatures might be damaged by various gateways. Enterprise mail
gateways may perform Content-Type header fix-ups which damage a
signature, for example.
In which case they SHOULD be validating the DKIM signature before
performing the fix-ups. They are the (incoming) border, so are the best
place to perform DKIM, SPF etc checks.
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