$dayjob gave me an email, but they are the only ones that use it. My primary is a GMail, though I really should switch to a less crappy provider. I run my own mail server, all my GMail is just forwarded there, but it’s not my primary because too many people were having problems sending or receiving mail though there.
So, 3 or less in practice.
I also have a half-dozen variant usernames at GMail and can trivially create as many as I like on my own mail server. So, unbounded in theory.
I’ve given up. Especially with my new address (same state), I don’t think any of the races are even close.
I voted as hard as possible until (and including) 2022, but Dobbs hurt, and this latest round of SCOTUS rulings and it is going to be harder to get to a voting station. It just doesn’t feel worth it.