CSC 379:Week 1, Group 4

Spam Fighting Techniques

• block domains or even top-level domains "known" to be large senders of spam
  • Spamhaus Block List
    • see faq also
• require users to request permission to send you e-mail (eg Earthlink spam blocker)
• Charge for e-mail sent
  • see article
  • PDF paper on charging for email
• opt-in for commercial email
• domain authentication
  • what canada has to say about it
  • seemingly useful article with links to domain authentication related concepts
• bounties
  • MSNBC article
  • another article about same event
• the "goodmail" approach
  • goodmail article
  • goodmail web page
• bond with escrow agencies
  • microsoft using following service
  • service for escrow
• client-side filtering

huge paper on this subject

Technique Name	Pros	Cons	Our Rating
Block domains of "known" spammers	Gets rid of a large amount of spam Low chance of blocking legitimate email (sbl-faq) Mechanism to allow legitimate sources to know they were blocked (sbl-faq)	things	5 stars!