I use Migadu with simplelogin. So I get to use my own domain the easy way, and I believe it costs around $9/year. With simple login I give a proxy address all the time and I stop the spam anytime I want. I think it costs around $10-15/year for unlimited email addresses. I experienced that even governments leak/sell your email address and I end up with unwanted spam (or marketing as they call it) so I highly recommend simplelogin and always hide your real address.