Includes information regarding laws, filtering, spam prevention, and responsible marketing, as well as information and advice about how to complain about spam. Laws, anti-spam information, and links to other resources... 

http://spam.abuse.net/

United States, European Union, and other countries' laws and pending legislation regarding unsolicited commercial email... 

http://www.spamlaws.com/

Provides a general overview of the spamming phenomenon. Links to articles which discuss the techniques of spammers on particular media: Internet e-mail, instant messaging, Usenet newsgroups, Web search engines, weblogs, and mobile phone messaging. Another article describes ways of stopping e-mail abuse... 

http://en.wikipedia.org/wiki/Spamming

Anti-spam resources include papers examining the problem of bulk e-mail and links to other organizations... 

http://www.imc.org/imc-spam/