Marissa Mayer

Big email hack doesn't exactly send the message Yahoo needed

Yahoo has been struggling for years to keep people coming back to its digital services such as email. That challenge just got more daunting after hackers stole sensitive information from at least 500 million accounts.

The startling breach disclosed Thursday is believed to be the largest to hit a single email provider. The security breakdown risks magnifying Yahoo's preexisting problems — specifically, that it is losing users, traffic and the advertising revenue that follows both, to rivals such as Google and Facebook.

Some snarky online commentators quipped that the hack would have been far more devastating if people actually still used the company's services. While...

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