Tutanota never let you use a third party mail client to begin with. Same issue with Protonmail bar their overly complex bridge. Don’t lock yourself and instead look into IMAP providers such as Migadu, Fastmail, and the likes. I personally use Gandi, as you get 2 inboxes for free when you buy a domain with them.
I’d like to add that Password Store has built-in integration in GNU Emacs and you can easily navigate your vault via pass. Further, syncing your passwords with other devices is only a matter of creating a Git respository, and using Android Password Store and OpenKeyChain to access and decrypt them on mobile.
Tutanota never let you use a third party mail client to begin with. Same issue with Protonmail bar their overly complex bridge. Don’t lock yourself and instead look into IMAP providers such as Migadu, Fastmail, and the likes. I personally use Gandi, as you get 2 inboxes for free when you buy a domain with them.