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
• opt-in for commercial email
• domain authentication
• bounties
• the "goodmail" approach
• bond with escrow agencies

Technique Name	Pros	Cons
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