The usual method of dealing with spam is get the IP address of the person that generated the spam. This means getting hold of an e-mail header which is difficult to explain "how to get" because there are so many different mail programs and online mail settings that might need to be clicked to get one, so this assumes you've got their IP from this.
You can then do a lookup on the IP address, so you know the canonical name and other data.
(Those that computer lit. will find this easy, but for the rest of you either use:
http://www.info-x.co.uk/netools/netools.asp?tool=13
http://sunny.nic.com/cgi-bin/whois)
When you know which domain name they are from (note your after an ISP domain if it's a DSL/CABLE connection outputting the spam) Get the domain output which might be dsl44-55-66-77.anisp.net, and generate an abuse e-mail address. i.e.
abuse@anisp.net
FWD: the e-mail you recieved (INCLUDING FULL HEADERS) to the abuse e-mail address, if the e-mail included attachments, then don't bother sending the attachments.
Just type something in the top of the FWD: like:
Dear Sir(s),
I'm forwarding the following e-mail entitled *what it was titled*, which I received *date & time*. I have reason to believe it's *spam/a worm* as the IP continually sends the same content.
I have made sure the forward contains both the HEADER of the e-mail and the message contents. Due to the risk of spreading infections I've withheld the attachment.
Could you please deal with this problem on your network.
Regards,
*you*
Thats pretty much all you can do, the ISP's usually are pretty good, when they have mails sent to abuse that contain the offending e-mail containing header they can deal with the ISP and even packetscan to work out which ports are infected. (Sometimes they pull the plug on the whole IP until the system is made safe again).
Don't go silly though trying to get revenge on someone that you think is attacking your e-mail address, most of the time it's because the person is using an unpatched OS with an out of date anti-virus program running, so it's just those points that caused the outbreak rather than spitefulness.