Leaving Proton has been in the back of my mind for a while, and this is probably the last straw for me. I've previously heard that Fastmail is good, but I'm interested in what others are doing. I agree with you that email privacy and security are top of the list. I don't care about a private AI feature (eg, Proton's Lumo), and I don't need their productivity suite (docs, sheets, meetings). Just do one thing really well.
Looking for others' input on the right way to offboard from Proton.