why IPv6 isn't ready for prime time, SMTP edition

[trejrco at gmail.com (TJ)]

In an attempt to get this thread back on topic:
* Does Google require rDNS for IPv4 mail sources?
If so, doing so for IPv6 shouldn't be a surprise.  Your current provider's
inability to support rDNS for IPv6 is not a protocol failure, it is a
provider failure.

If not, is there an additional operational reason for them to do so in
IPv6?  ... and in that case, I'd come to the same end result,
provider-failure.

... ?

/TJ