Do it. It’s very straightforward.

• Buy a domain.
• Edit the DNS records to make your provider work with your domain.
• In Tuta (or even an alias service like Addy), create new emails using your custom domain.
• Done.

Whenever you need to switch providers such as if Tuta decides to support fascism like Proton’s CEO, you can easily switch to a new provider. Then add your domain to the provider, update your DNS records to point to your new provider, click Save. Done. And you won’t have to change your email addresses ever again.

“My body is ready… to spiiiiiiiiiiiiiiin!” - Iwata-san, channeling inner Reggie Fils-A-Mech.

Just an FYI that the Smart cancer has already began infecting computer monitors. It won’t be long until there are no more dumb monitors.

Samsung and LG make smart computer monitors. There are probably many others.