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.
--
Viktor.
