The problems with email in this article are nearly the same as those given by Klink founder Leerom Segal in an INC magazine article about Outlawing Email. Though Klink opted to build their own workflow management system to address these issues.

http://www.inc.com/jeff-haden/the-company-that-outlawed-emai...

Key highlights from INC article:

>“While email makes for a decent communication tool with clients, internally it doesn’t facilitate collaboration and basic workflow. Email has no intelligent mechanisms for prioritization, lacks context, lacks a framework for knowledge management, and saps accountability.”

>“We’ve all been on an e-mail thread where people are answering questions but really just creating more confusion,” Segal says, “or maybe referencing some missing yet critical attachment. So we looked for tools to help us better manage our basic workflow.”

>Knowledge can get lost in a person’s mailbox and prioritization is basically nonexistent since inboxes assume that most recent equals most important.