- Jul 21, 2017
- 358
The use of "invisible" tracking tech in emails is now "endemic", according to a messaging service that analysed its traffic at the BBC's request.
Hey's review indicated that two-thirds of emails sent to its users' personal accounts contained a "spy pixel", even after excluding for spam.

'Spy pixels in emails have become endemic'
Email app Hey reveals that two-thirds of the messages it handles contain the hidden trackers.
