• IN THE U.S. : Visit www.spamlaws.com.

• IN EUROPE : Visit www.spamlaws.com, but also the European Union site, specifically the section on the protection of data.

• IN SWITZERLAND:
  Modified law (LTC)

  As a result of a change to the federal law against unfair competition, customers are better protected from unfair mass advertising (spam) sent using telecommunications. Senders of such mass advertising must now obtain the consent of customers before transmission (the "opt-in" model). Telecommunications service providers are obliged to combat unfair mass advertising.

  In light of the Article 8 of the law on the protection of personal information (in French), you have the right to demand from a listholder what personal data he possesses that concerns you.

  The Federal Law on the Protection of Data (in French) (LPD - Rs 235.1), and more specifically Art. 8 on the Right of Access to Personal data

Until the day that rigorous regulations are in place to stanch the flow of unsolicited e-mail by dubious sources, the most efficient means of avoiding spam is undoubtedly through a mail filter that places all e-mail resembling spam in quarantine.
MailCleaner meets that demand. You will find information about MailCleaner here.