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Getting fewer advertisements for Viagra or low-rate mortgages in your inbox these days?

The Federal Trade Commission says that's thanks to the anti-spam law that took effect two years ago.

The commission is citing two reports by spam-filtering firms that show less junk mail this year than in years past. One says it's seen a nine-percentage-point decline in the first eight months of this year than there was during the same period last year.

The FTC says advances in technology, like spam filters, are also aiding the decline.

But some tech experts say they don't see any less spam than before. E-mail security firm executive Jordan Ritter says the anti-spam law only works when spammers voluntarily follow it. He says it's too hard to track down people who break it.