Apart from ADSP rules, a broken signature must be treated as if there was no
signature at all. That in itself is not the problem. The problem with broken
signatures is that people will not buy into a technology (DKIM) if it will
not cover a significant part of their e-mail.
Of course. That's why MLMs should sign their mail, or equvalently the MSA
they use should sign it. Problem solved, right?
Free bonus: MLMs can sign the list mail even if the contributor didn't
sign it.
R's,
John
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