If you just want pure email, migadu.com works very well. I like the fact that they price based on emails sent, not domains or addresses. This lets me run a diff

If you just want pure email, migadu.com works very well. I like the fact that they price based on emails sent, not domains or addresses. This lets me run a different domain with a regex based catchall for account registrations so that my personal inbox remains clean. They do require you to purchase your own domain but you should do that anyway to ensure that a provider can't lock you out of your digital life.