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Good ol’ Thunderbird
This one :)
Thunderbird on PC and K-9 Mail on Android
Apple Mail. I’d use Thunderbird if it used native frameworks for the UI; sadly this keeps me from using a lot of open-source stuff. I’m too picky
Mailspring
K-9!
mbsync to sync IMAP to my local machine, then mu4e in Emacs to manage everything
Evolution in Gnome
Betterbird
