Comment by teyopi

buy a domain.

create icloud account.

use their custom domain email setup (free btw) - https://support.apple.com/en-us/102540

Start replacing important account emails with your custom domain.

Every time you get an important email in gmail, login and update.

Bonus: icloud let's you create catch all emails, so you can create many burner emails such as hackernews@mydomain.com