> On Sep 23, 2016, at 9:11 PM, John Levine <johnl@xxxxxxxxx> wrote: > >>> Google has repeatedly said that they're not going to turn on DMARC >>> until ARC is available. >> >> They already have for google.com <http://google.com/>… gmail is probably a much bigger impact, but I >> discovered google.com’s p=reject when we accidentally turned on DMARC enforcement :/ > > Well, yeah. The domain google.com is used by about 57,000 Google > employees while the domain gmail.com is used by about a billion (yes, > really) Gmail users. I think my point is that there are already plenty of users posting to IETF lists with p=reject. There can’t be many recipients enforcing those policies, as I heard pretty quickly after we accidentally turned it on.