Exchange Server 2000 Event Sinks

I need an event sink for Exchange 2000 server. This will : Trap any incoming / outgoing email message and expose its properties (available before sending / receiving). Look in the contact database to see if the email address is there. If it is, then : append a link to the email before it gets to the recipient (if incoming). save message properties to contacts database I can write the code to look in the contacts database. I need someone to : Write the event sink which captures the emails Give me advice on registering it. ## Deliverables 1) Documented source code (either Visual Basic or WSH) of event sink which traps sent / received emails. 2) Any advice on registerign the event sink and getting it up and running. ## Platform Windows 2000 Exchange Server 2000