Right now I have a paid (€5/mo) ProtonMail account, hosting mail for my domain. I recently set up my own mail server under a different domain for other purposes. That server costs me €3/mo. I'm now wondering if I should ditch ProtonMail and move my other domain to my own mail server. As I see it, the crux is that Proton has a large, redundant infrastructure, and a dedicated ops staff. OTOH, I have a single point of failure and a part-time ops staff of one (me). In terms of privacy, I think PM has pretty good policies, but in my own case I have an absolute guarantee. PM also has a decent webmail interface, but I have Rainloop, which is more than adequate.
Thoughts?