Excerpt from Semler's 2004 book "The Seven-Day Weekend"
Wikipedia entry on Ricardo Semler:
An excellent interview with Semler by CIO Insight, unfortunately dated April 1, 2004:
Very good stuff about corporate email privacy, among other issues, here's an excerpt from Semler:
...we searched far and wide for anybody who could tell us what kind of software or system could be installed on our [server] that would make it impossible for our own IT people to spy on people's e-mail. We did not find one. We had to customize one.