You set message tracking only on a server. All messages that are
routed through a server are added to the message tracking logs. You
can record information about the sender, the message, and the
recipient. If you need to log more detailed information, you can
also record the subject line of the e-mail message.
On the Start menu, point to
Programs, point to Microsoft Exchange, and then click
System Manager.
In the console tree, double-click Server, right-click a
server, and then click Properties.
To record the subject of any message sent to, from, or through
the server, on the General tab, select the Enable subject
logging and display check box.
To log information about the sender, the time the message was
sent or received, the message size and priority, or the message
recipients, select the Enable message tracking check
box.