My email productivity went through the roof when I switched to mu4e (Emacs interface to mu).

I can in a few keystroke isolate the handful of emails that actually need my attention in the hundreds I receive every couple of days.

Org mode integration allow me to reference those that I may need in the future, or that require later action in my to-do list.

My time handling email is now reduced to 20min-2h every two days, in one sitting, my mind feels liberated. I can't recommend this setup enough.