A bit more context is important here. They aren’t E2EE, but they are stored encrypted. In the case of the person whose meta information was turned over, ProtonMail wasn’t forced to hand over the information right away, they were forced to collect it the next time that person accessed and used their email. That tells us that they didn’t store the information beforehand and could not access it without preparing to intercept it the next time their service was used.
Ultimately, though, if something like that’s a dealbreaker, it’s likely you’re doing something that would benefit from a more secure way of communicating than email.
A bit more context is important here. They aren’t E2EE, but they are stored encrypted. In the case of the person whose meta information was turned over, ProtonMail wasn’t forced to hand over the information right away, they were forced to collect it the next time that person accessed and used their email. That tells us that they didn’t store the information beforehand and could not access it without preparing to intercept it the next time their service was used.
Ultimately, though, if something like that’s a dealbreaker, it’s likely you’re doing something that would benefit from a more secure way of communicating than email.