If you already know you trust the list, how much practical benefit is
there to the assertion?
Not much. It seems to me that the best application of DKIM here would be to
ensure that posters to closed lists are (likely to be) who they say they are.
Oh, sure. For inbound mail, lists can use DKIM the same way that anyone
else does to recognize mail from senders whose mail they want.
Subscribers might manually note that all their mail is signed, a la
Paypal, or this might be a narrow scenario where ADSP could do less harm
than good.
R's,
John
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