Viktor Dukhovni:
> On Mon, Jan 03, 2022 at 12:32:03PM -0500, Wietse Venema wrote:
>
> > > offhand, is that generally needed/beneficial for google.com MXs?
> >
> > I don't know, does anyone want to be the guinea pig and discover
> > if they still randomly bounce email over IPv6?
>
> Last I heard the Google MX host policy is not quite that capricious,
> but messages over IPv6 are expected to tick more checklist boxes,
> by e.g. having DKIM signatures, and perhaps other "best practice"
> markers of being a "mainstream" MTA.
They would at random 5XX reject my mail over IPv6 because of
what they claimed was a DNS problem.
Wietse
