Are you frustrated with all the spammmmmm?!?!
Here is how to handle the bastards!
1) Make sure you have your email settings adjusted to view Full Headers.
2) When you receive the email, look at the headers and look for the Originating IP
address. This is the address of the home connection of the user.
3) Take that IP Address and follow the How to Use ARIN step below.
Arin is the IP address registry for America. It also has links for all registries around the world. I have filed complaints to many networks world-wide.
When you use Arin by placing the IP address in the search box, they will give you the network information and there is an email address to report abuse on that particular network.
How to use Arin.net:
Go to http://www.arin.net/index.shtml and plug the Originating IP address of the email into the 'search who is' box and voila! You have the info of the network that the sender is using.