A couple of questions:
What is a good way to monitor throughput of an Exchange Server? I'm looking
for messages received & messages sent per second ( or hour or day......).  
One other post I found when researching this subject suggested using W2K

I have a medium sized organization with several back-end Exchange servers
and two front-end servers used as SMTP gateways.  The routing groups are
setup geographically with two sites being hubs, all the others being
connected to the hubs.  In each of the hubs is one of the SMTP ...