@craigmaloney -- My one trouble is with dice.camp. I had no trouble with the octodon and tabletop.social, but I never got the confirmation email from dice.camp. I tried signing up again but it confirmed that my email and user name were already in use. I then tried to resend the confirmation email, but that never reached me (or my spam folder) either. Yet I can copy-paste the email I used and send myself email.
@MechanteAnemone Yeah, sadly the way Sage is using Mailgun doesn't handle reverse-name lookups, so mail servers will refuse to receive the mail. I've mentioned this to Sage but I think there's something else that's preventing it. Not 100% sure.
Naturally this causes other things like email notifications to not work. 😬