TechRepublic Webinar: 99.984% Availability?! How Gmail Is Built with Scalability, Reliability and Security in Mind
January 31, 2011
ZdNet Australia

The latest research from the Radicati Group found that on-premises email averaged 3.8 hours of downtime per month.

Open-source challenge to Microsoft Exchange gains steam
January 28, 2011
NetworkWorld

Microsoft Exchange Server, the 800-pound gorilla in the room, had a worldwide install base of 301 million mailboxes in 2010 and expects to reach 470 million by 2014, according to a market analysis by the Radicati Group.

It’s time to deal with that overflowing inbox
January 24, 2011
MSNBC.com

… for an average of 110 e-mails sent and received by each e-mail user every day, based on data from tech research firm The Radicati Group.

Too Much Content: A World of Exponential Information Growth
January 18, 2011
Huffington Post Blog

In 2010, the typical corporate user sent and received about 110 messages daily. Roughly 18% of emails received were spam, comprising both actual spam and “graymail” (i.e. unwanted newsletters, alerts, etc.) (Source: Radicati Group — Email Statistics Report)