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How to Tell Which Emails Quietly Track You

Your emails know more about you than you might think

Everyone send emails now: political parties, your book club, freelance journalists the social networks you're signed up to, your parents, that online store that you only bought one item from a decade ago, and many, many more.

What do a lot of those email senders have in common? They want to know whether the messages they send you are being opened, and there are a variety of tools available to help them do just that—tools that aren't all that hard to use.

A tracking pixel, embedded somewhere in the email, is how most people monitor whether an email gets opened. Once the tiny, hidden single-pixel image is loaded, it reports back to base. Their use across emails is now up to "endemic" levels, according to some experts.

Please select this link to read the complete article from WIRED.

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