Originally posted here by auxnymph
This tutorial is interesting, but I want to track them back to the machine they sent the emails on. Any suggestions?
afaik, the only way is if you're on the same network as the machine that originally sent it, or if you're a cop or work at the isp that provides the net access for the machine that sent the message. in the first case, there should be some common trait in the way ip's are assigned. For example one room may be 192.168.0.100-120. Also, most routers will tell you the name of the computer an ip is leased to, then if you did a good naming scheme you can easily find the computer on the network. The other instance of being a cop with a warrant or working at the isp: If you're a cop you can talk to someone who can give you the info of which address(physical like a street address) of the owner of that ip. And if you work there you can get the info yourself.