Howdy Richard! First, thank you very much for the reply, I really appreciate it.
Protonmail must be doing something squirrely. It’s a new account, just started it this morning, and only have 7 emails and checked the spam, and there is absolutely nothing. I’m not the only one with the problem, a user on my new forum (Gauntlet) also hasn’t received a single email to his Protonmail, and he’s a long time paid Protonmail user, so I don’t think it’s some new user backside filtering going on.
I will reach out to support now, thanks again. I’ll also reach out to Protonmail support to figure it out on their end.