Have a personal domain name and use it for email. That way you are not dependent on the provider. It's like owning land, if you don't have a domain name and do

Have a personal domain name and use it for email. That way you are not dependent on the provider. It's like owning land, if you don't have a domain name and do not own the infra or pay for the services you are just a 'peasant' with no rights.