Re: [ietf-822] WSJ/gmail/ML, was a permission to... (off-topic)

["John Levine" <[e-mail]>]

>It strikes me that the RFC-5322 resent-headers, which don't seem to be 
>used much, might be a good starting point for such standardization - for 
>a start, by getting past the overloading of the From: header that causes 
>so many problems.

Keep in mind that anything a mailing list can do, a spammer who wants
to piggyback on the generally good reputations of mailing lists can
also do.  Anything that says "I'm a mailing list" is only useful with
some sort of external validation that it really is a list.  If you
have to do that anyway, you might as well use the list's DKIM
signature as the key which doesn't involve inventing any new
mechanism.

I think it's also pretty clear that any scheme that depends on the
DKIM signatures of incoming messages transiting mailing list software
won't work, either.