[newscracker]

On desktop, I use Thunderbird, although it’s showing its age on performance and search. The lack of native integration with MS Exchange is also a drawback for me (I have used some extensions, but they’re not very reliable). I do donate to the Thunderbird project regularly though.

On mobile, I use Mail.app from Apple and connect to mailboxes using IMAP. The only exception is ProtonMail, which doesn’t support IMAP directly, needs a bridge software on the desktop and supports it only for paid tiers (which is a fine business decision).

For productivity, I don’t think any desktop app or webmail could compete with well configured command line applications (like Mutt, Emacs, etc.).