Carl S. Gutekunst wrote:
I get leery any time the specs assume that the guy running the
mail server and the guy running the DNS server are on speaking
terms.
No matter what 2821bis will say, when IPv6 enters the picture
they need to talk.
They already need to talk in the worst way but they don't. (Too much desire for
fiefdoms, I suppose.) And I don't see IPv6 forcing the issue. It can easily see
being the recipient of a one-way "in addition to having IPv4 address foo for
domain bar, you now have IPv6 address foo6, enjoy" message.
The mail guy in an IPvX network will want
mail from non-IPvX networks.
And they'll arrange it by setting up a relay of some kind. Perhaps
the case we should be looking at is this:
MX IN MX 10 IPV6
MX IN MX 20 IPV4
IPV6 IN AAAA ...
IPV4 IN A ...
Ned