I cancelled protonmail and the subscription ended right away instead of at the end of the paid period, so there’s that. Honestly it was just a bunch of little things that added up. I don’t remember any one thing that was specifically distasteful except for the cancellation. I’m on fastmail now.

I switched from protonmail to fastmail recently. Fastmail was a ton faster and didn't randomly forget my sessions. Night and day to use. It also let me use two custom domains without paying twice, which was nice.

I had a bad experience as well. Been a long time proton user. I had a CC incident where the proton mail annual charge was incorrectly, without my confirmation labeled unauthorized.

PM cut off access to my account for 4 days as the issue was being resolved with them. Like, yeah I get it shitty situation and they probably have to deal with a bunch of scammers but I think it was way too extreme of a response given I explained what happened and have been a long term customer.

I'm thinking about going back to Gmail now.... any ideas how to defend against this? For example, have a tested procedure to change MX records of the custom domain to another provider or even self hosted in order to restore email access while an issue is being resolved?

I believe it was cheaper back then. Doesn't seem to be now :)