Gmail MX over IPv6

[Phil Pennock]

On 2012-06-15 at 23:30 +0200, Luca BRUNO wrote:
> I'm not sure if it is a recent change or if I have just been
> white-listed, but today in mailserver logs I've spotted that gmail.com
> is already accepting mail over an IPv6 MX:

Recent, started with this year's IPv6 day.  I've been whitelisted for
a couple of years, but I noticed it on June 6:

  https://plus.google.com/101939425596655172174/posts/b5Rfyg8czw9

> I haven't yet seen any mail coming from gmail.com over IPv6, though. 

Me neither, but they do seem to have been giving some recent attention
to their SMTP gateways; they also recently picked up support for TLS1.2
inbound-to-Gmail.  Not yet outbound.

-Phil