Cost-based Anti-spam Systems
Since spam occurs primarily because it is so cheap to send, a proposed set of solutions require that senders pay some cost in order to send spam, making it prohibitively expensive for spammers.
Read more about Cost-based Anti-spam Systems: Stamps, Proof-of-work Systems, Bonds or Sender-at-risk, Suing Spammers
Famous quotes containing the word systems:
“I am beginning to suspect all elaborate and special systems of education. They seem to me to be built up on the supposition that every child is a kind of idiot who must be taught to think.”
—Anne Sullivan (1866–1936)