Tracker pixels in emails are now an ‘endemic’ privacy concern – ZDNet

Invisible pixels used to track email activity are now an “endemic” issue that breaches our privacy, analysts suggest. 
This week, the Hey messaging service analyzed its traffic following a request from the BBC and discovered that roughly two-thirds of emails sent to its users’ private email accounts contained what is known as a “spy pixel.”
Spy pixels, also known as tracking pixels or web beacons, are invisible, tiny image files — including .PNGs and .GIFs — that are inserted in the content body…

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