Ian, this makes no sense to me. If a signing domain is concerned enough to choose to implement ADSP, why would they reduce what they are signing to accommodate a small percentage of their mail going to MLMs that they may or may not be able to identify?
I'm with you. All of this emphasis on complex designs for MLMs strikes me as a waste of time, since it's a tiny corner of the mail space that has not historically been a vector for abuse, and shows no sign of becoming one.
That's why my advice is that lists should sign their mail, which is easy and at worst harmless, and we're done.
R's, John
smime.p7s
Description: S/MIME Cryptographic Signature
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