[ietf-dkim] besides mailing lists...

[John Levine]

>> And it is easy enough to do "F2F" in a manner that does not break the
>> authentication-based service. 
>
>How?

The system sending the mail signs it.  That's one of the great
advantages of DKIM, the signature doesn't have to match other header
addresses such as To: or From:.

A user whose domain publishes adsp=discard couldn't successfully use
such a service, but that's a limitation of ADSP, not of F2F mail or of
DKIM.

R's,
John