If you are in the small minority of people currently able to maintain less than a screen full of email most of the time (because your volume is low and/or you process them rapidly and consistently), your system is probably fine as-is. If you regularly have many more than that (hundreds, thousands?) residing in your email in-box, you’re dangerously subject to stress and numbness relative to your digital communication world.
Personal Productivity :: Art Of Working
Getting Email Under Control
Managing the flood of email messages that most of us need to interact with on a daily basis is a growing challenge. No one’s volume is diminishing. That “beast is out of the barn,” and we’re not going to be able to shove it back in! So, getting a grip on it with a good systematic approach is critical for staying sane.