The Department of the Interior just joined a number of other
federal agencies in moving to Google's cloud email services.
http://www.informationweek.com/news/...saas/232901270


Top 10 reasons to use Gmail
https://mail.google.com/mail/help/intl/en/about.html
Gmail makes email easy and efficient. And maybe even fun.
  1. Less spam - You don't like spam. Neither do we. Gmail blocks spam before it gets to your inbox.

  2. Search - Search instantly within Gmail to find the exact message you want.

  3. Conversation view - Messages are grouped with the relevant responses -- so you can always see messages in context.

  4. Built-in chat - With just one click, you can chat in Gmail or talk face to face with voice and video chat.

  5. On the go - Access Gmail from your phone – regardless of which device you use.

  6. Lots of space - Over 10 GB (and growing) of free storage space – and tons more to purchase if you need it.

  7. Call phones - Call any phone in the U.S. and Canada for free and get low rates to other countries.

  8. Priority Inbox (Beta) - Automatically separate important email from everything else and focus on what really matters.

  9. Secure - Just like bank websites, Gmail uses HTTPS encryption to keep your mail secure.

  10. Free! - All this for free? You betcha.