My boss wants me to provide an easy to read audit of one users email usage.

We currently have GW7 and Gwava. I know I can keep a copy of all incoming emails with Gwava, but I do not think I can use it to track outgoing usage.

Does anyone know of a product that will do that with a GW system that wont require a massive interruption in email service to implement?

Ideally, it would allow me to set as low as ONE persons mailbox for in and out traffic.