I think that is the tradeoff between encryption and searchability. When I need to search something across my e-mails I use Thunderbird with proton bridge on my laptop.
the tradeoff seems obvious at first in favor of privacy. But when I consider that I need to search quite regularly (sometimes on mobile) in thousands of emails of at least the last decade, the tradeoff is not easy anymore.
https://proton.me/support/search While not ideal it can be enabled in web app if your browser allows web storage. See this article.
thanks. yes, I've already tried that. It works with a reasonably small collection of emails, but with an archive over 5Gb it's not really a workable solution.
I assume increasing the cache size doesn't help?
I've not tried that and I don't really want to be tinkering with browsers everywhere (I use 2 desktops, 2 laptops and 1 smartphone). I need something easy enough. I initially hoped that ProtonMail = Gmail + privacy but in its current state and with a big archive, it's ProtonMail = Gmail + privacy - searchability, which is frankly less compelling. So far, I've moved all communications with banks, shopping sites and private conversations to Proton, but Gmail remains important for the rest and I don't find it handy to need managing both.