Literally none of the middle-managers I work with can manage their own inbox. I'm certain they'll *only* read an email if it comes from a supervisor or a customer/vendor (depending on what side of the fence they're on), and everything else gets a "quick glance" at most. There's no technological solution to the problem because those solutions already exist and aren't being used, for a variety of weak excuses used to cover for a lack of Basic Office Skills.