Not dead yet

The Radicati Group foresees continued growth in e-mail accounts, despite the rise in alternative tools for communication and collaboration, such as blogs and wikis.

Active corporate e-mail accounts worldwide:
2009: 568 million
2010: 597 million
2011: 626 million
2012: 657 million
2013: 691 million

Storage requirements for e-mail will also continue to grow.

Average number of corporate messages sent/received per day per user:
2009: 167
2010: 179
2011: 192
2012: 205
2013: 219

Average storage per corporate user per day:
2009: 20.3M
2010: 22.3M
2011: 25.0M
2012: 27.6M
2013: 30.8M

Source: Radicati Group