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

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 of an email.

They may appear as clear, white, or another color to merge with the content and remain unseen by a recipient and are often as small as 1×1 pixels. Similar pixels are also widely used on web domains to track visitors.

However, according to Hey co-founder David Heinemeier Hansson, they also represent a “grotesque invasion of privacy.”

Full article: Tracker pixels in emails are now an ‘endemic’ privacy concern | ZDNet

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