Dmitri Alperovitch talks about reputation-based spam protection
Reputation-based security is very similar to what the financial
services industry has created with credit agencies. Every person who has ever
paid a bill or used a credit card has a credit score-a credit reputation, if
you will. When you want to buy a new car, the finance company looks at your
reputation, and then decides whether or not to let you past the gates and give
you some money. We now have the same thing for people who send emails.
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