Protonmail will let you point a custom domain at them and deliver to the same mailbox as your protonmail e-mail, starting with their lowest subscription tier (w

Protonmail will let you point a custom domain at them and deliver to the same mailbox as your protonmail e-mail, starting with their lowest subscription tier (which I personally would have signed up for anyway to support them). Product experience is pretty good. I don't disclose that address to many people, so I can't vouch for the spam filtering.