A customer asked us to help with a tool to audit for mail rules that were forwarding emails externally. I had a look around and found the very good openNTF Mail Rules Analyser application from Thomas Hampel
Having looked at it David Harding and I felt that it was great starting point but we wanted something a bit different that could be used by an auditor without admin access and which showed the history of mail rules.
We modified the application and are hoping to feed back some or all of the changes into the openNTF project. In the mean time you can down load it from this link Mail Rules .