There's always Mutt, of course. Easily beats the ones you listed, especially when handling larger volumes of mail. Development picked up some steam again in rec

There's always Mutt, of course. Easily beats the ones you listed, especially when handling larger volumes of mail. Development picked up some steam again in recent years, with forks like mutt-kz[1] (now deprecated and folded into neomutt[2]) integrating awesome search functionality. Claws Mail has some fans, too, and might be more accessible to Thunderbird users. [1] https://github.com/karelzak/mutt-kz https://github.com/karelzak/mutt-kz [2] https://www.neomutt.org https://www.neomutt.org