"email's real value isn't in communicating with Kuala Lumpur but with Betsy in the next cubicle. The most productive workers have the densest intracompany email web.
This shouldn't surprise us. Email makes it quicker and easier to reach your colleagues — you don't have to interrupt them, and messages are easy to process. But email doesn't stop you from wanting facetime, too. Just the opposite: By enabling us to maintain productive business relationships with more people, it encourages more face-to-face contact. "