I suspect that the notion of managing one's inbox creates a sort of kruger-dunning effect with the inbox owner in terms of perceived productivity. I've given up active or structured management of my inbox : I read a few times during the work day, try to keep up, but don't get worried about missing 40% of things that come through. I'm at-ease with the notion that important communications have a way of finding me (emai…
Ah, so you're one of those folks who doesn't answer my emails! Makes me pester you multiple times, by email, SMS, Skype, and if I'm truly desperate, the dog park. You're just outsourcing the work of communication onto me. When you ask for a favor I will pretend I didn't hear it! Winky emoticon.
If that isn't a compelling argument, keep in mind that many engineers have varying degrees of ADHD, and email is a huge distraction from getting what they normally do done. Every context switch is painful, so they often put it on mute.