Rohit, if you're looking to track it from the machine it was sent, or the machine recieving, this is possible. You need to park your software listening on the network stack, and pick up this kind of traffic and log it. If you are looking at tracking all messages that are sent on a network, success will depend on what kind of network. If it is switched, forget it. If it is a normal hub (or a switch port set to promiscuous mode), then you can "listen in". Look in the Networking section on Firewalls, and you'll see a couple of examples of how to latch on to the network traffic. Good luck. Pauwl