E-mail snooping
A recent survey of more than 800 U.S. companies found a majority of them monitoring employee e-mail:

• 60 percent use software to monitor outgoing and incoming e-mail
• 27 percent monitor internal e-mail between employees
• 78 percent have a written policy governing e-mail use and content
• 54 percent train employees about e-mail risks, rules and policy
• 25 percent have terminated an employee for violating e-mail policy
• 20 percent have had employee e-mail and instant messages subpoenaed in the course of a lawsuit or regulatory investigation.

Source: 2004 Workplace E-Mail and Instant Messaging Survey, American Management Association and ePolicy Institute