Sigh...Seems like every time Proton gets criticized, their fanboys always ensure to let you know that you're somehow wrong. I don't know how they managed to get recommended by so many people considering they provide unaffordable services for everyone not on a high income. I would try to migrate if I were you, they're pumping new features constantly despite their users wanting bugfixes and improvements to existing ones to gain more and more ecosystem users. It's a dark pattern. Look at Google and Apple.
"Oh, what about the free-tier?" It's a joke having to use their own clients when powerful open-source ones exist. "Oh, but it's because of the encryption that's protecting you!" I know how to use PGP, thanks. Plus, it only works if you're sending to other Proton accounts, and guess what? I don't even have control over my own key pair! (Edit: and when migrating away, I can't even bulk export my emails!)
Even the comments made by me and Dsklnsadog got vibe-based downvoted because they can't even bother to come up with a response on why our opinions were wrong. I'm glad I stopped using their services before I sent them any money.
Like this one https://github.com/amnesica/KryptEY?