On Thu, Nov 01, 2018 at 01:15:04PM -0700, Alice Wonder wrote:
> > My advice is to accept the current state as a transitional phase to
> > to potentially more secure email in a decade or so from now.
> >
>
> Both opportunistic TLS and DANE secured TLS could still be supported on
> Port 25 allowing a staggered adoption until such time that the majority
> of mail servers implement it.
Sorry, it can't be turtles all the way down. Anything that can
reliably signal a mandatory security policy for port 465, can with
less disruption do the same for port 25. And port 465 is already
taken for SUBMIT, it is NOT an inbound relay port.
--
Viktor.
