I have been mulling over Posteo for encrypted mail. Looks like a lot of the same benefits as mailbox.org, but my main attraction was the price (one euro per month) and fact that they do not associate payment with your email account. Haven’t done a deep dive but will compare to mailbox.org before I pull the trigger.
I was looking at Proton for mail and calendar right around the time the Andy thing kicked off. I hadn’t yet pulled the trigger on Proton due to their fairly high pricing. I ultimately decided on Tuta for mail and calendar, and I have no issues using their native/desktop apps. I am still forwarding everything from my Gmail account as I slowly work through changing my email on key services. So far so good.
The one issue I had with Tuta is no ability to import mail unless you are at the highest priced tier. I’m on the middle one so no import. What I did instead was just download a copy of my Gmail to an MBOX file, and I have that on my desktop and access it with Thunderbird (read only) as needed. This was fine for me as I don’t have much mail of significance.
Switching was a small action, but one that made me feel immediately better, like I did something concrete in opposition to the rapidly enshittifying tech universe.