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Fitbit hacked?

news.ycombinator.com

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Re: Fitbit hacked?

#6
post #3

How do you know they were from FitBit, rather than from a spammer with their From address set to FitBit?

good question - i believe the email address was Fitbit but will confirm

Ah, sounds like you don't know about from addresses: they are specified by the sender, and not authenticated. A spammer can send email that appears to be from anyone else, until you look at the validated headers (like "Return-path:").