It can't do maildir. I tried mdir:/// maildir:/// file:/// and /.

grep -R maildir of the code returns nothing.

So I guess, using it on local mail is a no go. Sad. I tried it only because this was advertised, only to be disappointed.

It's better to not advertise features you don't have. Or at least state what features you have instead of mixing what you have and have not into a feature list at random.

It's also far cry from the configurability of the mutt/neomutt. But that can change. It would certainly be nice to have a properly scriptable terminal based MUA, as neomutt, while nice, and flexible, is kind of hard to configure.