Automatic key verification / CERT in DNS / RFC4398

[Julian Mehnle]

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Julian Mehnle wrote:
> Werner Koch wrote:
> > The goal of PKA is much simpler: Authenticate the From: header and
> > allow the MUA or MTA to detected spoofed messages this way.
> >
> > The ability to do an opportunistic encryption using the PKA framework
> > is just a very welcome side-effect.
>
> It is exactly that side-effect of opportunistic encryption that SPF aims
> to support.

Oops, please read that as "opportunistic authentication".  But that's not 
all that different.
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