Would You Warranty Your Email?

A team from the University of Michigan is proposing an economic solution to spam. Instead of relying on technical solutions or government regulations, they use a sender warranty system. In some cases, they argue, it can even be superior to a perfect filter with zero cost, and no errors. With the caveat that some infrastructure is necessary, they also claim their approach restores control to the recipient, halts spam, and creates a marketplace for valuable information exchange

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