Some good ideas in there I think. But I think unless you can shoe-horn them into the existing MX record and get piecemeal buy-in, the results will be quite similar to what we see with IPv6 vs. IPv4. No?
email has already been sufficiently captured by the big guys that if they chose to support this, there would be buy in. and without their support it's dead.
if outlook and gmail announce that emails that aren't MX2 get ranked more harshly in their spam filter, everybody will adopt it. if they don't do that, nobody will.
Seeing how we got a brand-new and very shiny `HTTPS` RR type instead of using the existing `SRV`, I'd say the hope for improved email is not zero. Still very close to zero, but not zero.
I don't see the problem with implementing it via the MX2 option. That makes backwards compatibility a lot easier than messing with the existing MX option. It also means if the proposal goes over like a lead balloon it at least won't have made the existing situation worse.
Good luck convincing Microsoft to implement anything you're suggesting in Outlook though. Or for Google to add it to gmail.
