CSC 379:Week 1, Group 4

Spam Prevention 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

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!
require users to request permission to send you e-mail (eg Earthlink spam blocker)	pro	con	4
Charge for e-mail sent	pro	con	4
opt-in for commercial email	pro	con	4
domain authentication	pro	con	4
bounties	pro	con	4
The "goodmail" approach	pro	con	4
Bonds with escrow agencies	pro	con	4
client-side filtering	pro	con	4