 FACT: The end of the movie is all about the search for the computer  that has supposedly the IP address from which the fake email has  been sent. But no computer in the world has its own IP address. It  just gets it from the network connection. A laptop connects to the  Internet at home and gets an IP address, but if the same computer  connects at the campus the IP will be another one. Besides, most  networks uses dynamic IPs, getting the error even bigger.