I’ve been with Tuta mail for years now and it just keeps getting better. It’s not free, but I believe that that’s why it’s a good choice. They’ve add the calendar app and are expanding to cloud storage.

It's also an argument for not having your own domain for emails, because you may one day loose that domain too, and someone could poach the domain to impersonate you.

Yep, it's a great idea

This. Don’t ever delete the account because someone will scoop it up and impersonate you. Just set auto reply and log out. Check the terms, you may need to log in every 6 months though. Do that a couple of times at least.

This is what I did. I set up autoresponse giving out an address that redirects to my new email address. My parents called me to see if I was hacked. Everyone else just started using the new address.