EmailAbuse.org  
   Tips to help identify and report email abuse.
   http://www.emailabuse.org/

SamSpade.org  
   Software tools for tracking spam.
   http://www.samspade.org/

How to Interpret Email Headers  
   Instructions for interpreting e-mail headers.
   http://help.mindspring.com/docs/006/emailheaders/

Stop Spam FAQ  
   How to find a spammer and how to respond to spam.
   http://www.mall-net.com/spamfaq.html

net.demon  
   Downloadable software to trace the sender of an e-mail and locate the spammer's real web site.
   http://www.netdemon.net/

The Spamhaus Project  
   Tracks known Spam Support Services and lists the ISPs who keep organized spamming alive; includes news, block list and ROKSO, the Register Of Known Spam Operations.
   http://www.spamhaus.org/

Spam Tracking Page  
   Comprehensive collection of tools to help track spam.
   http://www.rahul.net/falk/

Adcomplain  
   A Perl script to automate spam complaints.
   http://www.rdrop.com/users/billmc/adcomplain.html

The SPAM-L FAQ - Tracking Spam  
   Instructions for reading e-mail headers and complaining to the spammer's ISP.
   http://www.claws-and-paws.com/spam-l/

SpamX - Blocking, Tracking and Reporting  
   Effective software to help block and report the sending of spam. Works with existing POP3 email account(s) and runs on Mac or Windows computers.
   http://www.spamx.com/

Fighting Spam Article by OpioN  
   Basic information on tracking source of spam.
   http://neworder.box.sk/newsread.php?newsid=3000

iNetCheck  
   Spam tracking tools
   http://www.dataphone.se/~astilbe/inetcheck/

SpamFilter: Report Spam Plugin  
   SpamFilter quickly tracks spam source and easily helps send complaints.
   http://www.nehuenmultimedia.com.ar/html/spamfilter.html

Spam Delenda Est  
   Steps for tracking spammers and getting their accounts revoked.
   http://www.stentorian.com/antispam/index.html

JMHO on Spam  
   Resources for tracing and reporting spam.
   http://home.att.net/~marjie1/

What to do about Unwanted/Offensive Email  
   Explains in detail how to track and complain about spam.
   http://www.oitc.com/Disney/WhatToDo.html

Spam Identifier  
   Tools for identifying the source of spam and reporting it.
   http://www.spamid.net/

Exterminating Spammers Step-By-Step  
   Describes procedures and basic tools that recipients can use to report senders of unsolicited commercial email.
   http://www.camblab.com/nugget/extermin.htm

Reading Email Headers  
   An in-depth analysis of how e-mail is sent and how to read its headers.
   http://www.stopspam.org/email/headers.html

Figuring out fake E-Mail & Posts  
   A comprehensive guide on how to track down the source of the spam.
   http://home.digital.net/~gandalf/spamfaq.html

Mail Parsing & Tracking  
   Displays visual email routing and the time taken to go from server to server, allowing each mail server hop to then be queried against common spam blacklists.
   http://www.levinecentral.com/mail_parse/default.aspx

eMailTrackerPro  
   Helps identify the true source of e-mails, to help identify and report spammers. Analyzes e-mail headers and provides the IP Address of the machine that sent the e-mail.
   http://www.visualware.com/personal/products/emailtrackerpro/index.html

Anti-spam: AOL edition  
   A page for AOL users to help combat the threat of spam
   http://sine.tmug.org/~macmaxbh/spam/

Project SpamChart  
   Tracks spam statistically as reported by numerous users running SpamAssassin.
   http://www.crowders.com/spamchart/

alt.spam FAQ or "Figuring Out Fake E-Mail & Posts"  
   Describes how to find out where a fake post or e-mail originated from.
   http://fuzzo.com/spam_faq.htm