Lol you can join the community from another instance. If you're talking about joining the instance, I just used a temp email and explained that in the application. Honestly it's just to fend off bots.
Gotta reset that password somehow :P At the core, all the interwebs are federated through email. God forbid you try to run a mail server these days though, blacklists are brutal. I hope activitypubland never gets that bad
Yup, best to do it like [email protected]er because /c/whatever is Reddit language, and you don’t know what instance it’s on if you use /c/, so you can’t go to that community.