The U.S. Congress gives final approval to the first federal law regulating spam, which President Bush has indicated he will sign before the end of the year.

Among many provisions, it requires that marketers include "a functioning return" address or a link to a Web form capable of accepting unsubscribe requests. Critics have said it ultimately will fail to have much of an effect on the amount of spam reaching people's in-boxes, in part because of the volume of spam coming from overseas.

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