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Re: (DMARC) We've been here before, was Why mailing lists

2014-04-18 10:26:43
Using Sender: as the authentication key was suggested and ultimately
abandoned during both DomainKeys (RFC 4870, the predecessor to DKIM) and
Sender-ID (RFC 4406, pretty much never implemented) for this sort of reason.

Yup. The patent license didn't help, but the fundamental problem is that it didn't do what users needed it to do.

Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
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