Good ol’ Thunderbird
This one :)
Thunderbird on PC and K-9 Mail on Android
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I use Thunderbird on desktop and K9 on mobile.
I can’t say I love either but I’ve tried a bunch of options and they were the best for me. Plus development has picked up on both recently so I hope they get polished up.
IIRC, the primary (and maybe only?) dev for k-9 mail on Android was hired by the Thunderbird team, and eventually, k-9 will get rebranded as a mobile version of Thunderbird (presumably with eventual setting sync capabilities and feature parity and such).
Yes, that is a large part of what I meant by “development has picked up”. IIUC there are now multiple full-time devs on K9 (which I guess will be called Thunderbird Mobile or something eventually)
Betterbird
Mailspring
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mbsync to sync IMAP to my local machine, then mu4e in Emacs to manage everything
I use Apple mail and thunderbird when on Mac and Linux respectively
Thunderbird on the desktop. k-9 mail on mobile.
Tutanota. It’s free and encrypted.
And I just use a plain text-document to compose the email.
Evolution in Gnome
Neomutt. May take a little of a learning curve, but nothing is as quick and efficient at getting through masses of email.
@nour I use Gnome’s Evolution. It was installed by default and its never given me any problems so I haven’t had a reason to switch to anything else.