Currently thinking about either Tuta or Mailbox.org, but to be honest, I don’t even know many providers.
Something I do not like is limit on number of addresses with a custom domain. Mailbox is at least a bit reasonable with 50 on Standard, but Proton’s 10 on Mail Plus is disqualifying for me.
Tuta has unlimited number, but doesn’t support PGP.
So I plan to check out whatever you guys use.
I use Proton. I have 3 aliases, then I use their mail forwarding SimpleLogin with another 7 aliases (that you toggle on and off), and I own a couple domains, which Proton has configured, so I can use those as well.