Spamhuntress has a good wiki on tools to use in tracking down spammers.
These are tools of different types that I’ve found useful while tracing
Tracing
- trimMail (http://www.trimmail.com/tools) Online tracing tools
- DNSstuff (http://www.dnsstuff.com/) Online tracing tools
- Web-Max Reverse Whois (http://www.web-max.ca/tools/domain.php)
- Passive DNS Replication (http://cert.uni-stuttgart.de/stats/dns-replication.php)
- Dig (http://hn.org/www/tools/dig.cgi)
- Webcomindia tools collection (http://www.webcomindia.net/tools.htm)
Link here.
Alex Eckelberry