How do spammers know an email is active?

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I recently put my old Hotmail account on my phone, which I traditionally only checked a few times a year. I went from 1-2 spam emails every few months to several a day, after going through all the old ones and marking them as spam. How is this possible? I haven’t given this email out in years, and none of my monitoring services have flagged this email recently. It seems spammers somehow know this email is active again.

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Anonymous 0 Comments

Dead emails would have a bounce back message from the domain.

They also don’t much care if the email is ‘active’ these things are run by bots and defending out billions of emails blindly.

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