Gmail

Why use Gmail?

Top ten reasons to use Gmail
https://mail.google.com/mail/help/intl/en/about.html

Using Gmail for your personal email, why use anything else?
http://www.techtous.com/blog/using-gmail-for-your-personal-email-why-use-anything-else/

Why and how to use Gmail
http://www.koonec.com/k-blog/2010/10/14/why-use-gmail-for-all-your-emailing-and-how-to-use-it/