CIRCLE WITH A DOT

@Bebef @kkarhan @momo @badkeys
Do y'all have any docs on this you could link? Is it a blanket automated check a la DKIM and SPF or is it something that's reviewed when appealing an anti-spam listing? My search queries aren't turning up much.

OpenBSD is the Volvo 240 of operating systems and I mean that in the most loving way possible.