VRC is blocking Protonmail and forcing me to stay on my a gmail address that I don't want to use. I suppose it makes sense to block providers you don't trust to be easily autobotted at account creation, but I've already made my account with a provider that you find “trustable”. It doesn't make sense to restrict people from switching to their actual emails after they've passed that account creation barrier. I also pay for VRC+, and apparently that's not considered either to give me the freedom to set my actual email.

Plus in any case, it's as easy to make a new gmail account as it is to make one on Proton (I actually have found that it is perhaps a little harder on Proton as they tend to require additional verification, I suppose to avoid getting blocked by services like yours). Gating email providers this hard, ones that are used by everyday people, is such a needless pain that I've only come across with you guys.