[nickysielicki]

You should take a look at notmuch [1]. It takes a little bit of time to get started (I recommend afew [2] for initial tagging), but I don't think I could ever go back to another mail system. It changes the way that you go through mail, no more folders: between tagging and extremely fast searches, there's no need. Just like an application launcher on modern desktops, there's no need to go through a big menu: press your search key, type what you're thinking, and there it is.

It doubles the size of your maildir with the indexing, which is a downside if you're crunched for space, but maybe that gives you an idea for just how much is indexed and how fast you can expect searching to be.

It's fair to say that the most popular interface for it is the emacs interface, which is great if you're already using emacs for mail because your workflow won't change substantially. There are other interfaces available, I have used one called alot [3] and find it to be very good as well.

[1]: https://notmuchmail.org/

[2]: https://github.com/afewmail/afew

[3]: https://github.com/pazz/alot