When using #m2sync, compared to #mbsync, you need to use "maildirpp:" instead of maildir "maildir:".

Just though to mention since I was puzzling around this for few hours, and wondering why #notmuch finds everything, and aerc finds nothing.

EDIT: Had some issues with this but it seems interesting and relevant so I keep tracking this project. Now I at least got the mbsync bug fixed in Fedora.

I found a modern actively updated alternative for #isync (or #mbsync): #m2sync

It is part of #vomit project: https://sr.ht/~bitfehler/vomit/

Compared to the complexity of ~/.mbsyncrc, my config is now dead simple:

cat .config/vomit/config.toml [kapsi] local = "~/.cache/mail/kapsi" remote = "mail.kapsi.fi:993" user = "jjs" pass-cmd = "pass show imap/mail.kapsi.fi"

I love vomit!

vomit: The Very Opinionated Mail Interaction Toolkit