Not the OP, but if youve got your own domain, you can register it with Proton so that you can create email addresses on it that route to your Proton inbox.

How it’ll work is:

• Proton will ask you to verify you own the domain (by adding a few TXT records on it)
• then Proton will give you some MX records you can add to your domain so that mail routes to Proton using your domain.

• Protonmail
• Spotify
• Kagi search
• a handful of servers scattered in DigitalOcean, Hetzner, and AWS
• Sendgrid