How Does Blocking Pictures in an Email Protect My Privacy?

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In Windows Mail, I received an email from a known vendor (not spam) with all the pictures withheld. At the top (below the header) there was a message which read:

“Some pictures have been blocked to help prevent the sender from identifying your computer. Click here to download pictures.”

My question is: How can a sender identify my computer by me receiving pictures? And of course, how great is the risk?

“Identifying your computer” in that informational message is somewhat vague, as it’s not exactly what can happen. But the concept is still important.

And in fact, if you’ve ever seen ads or services that claim “we can tell you if your email has been read” – images are how they do it, and it’s also why they can never be 100% reliable.

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How Do I Put a Picture into the Body of an Email?

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I have been wondering for a long time how to put pictures and other things on the face/body of an e-mail. I’m not referring to a separate attachment.
The big problem with attempting to answer this is that the answer is different, depending on what email program you use, and perhaps even dependent on the email provider you might be signed up with. In many cases the pragmatic answer is: you can’t. On top of that, even if you do put your images in the body of your email, there’s no guarantee that your recipients will see them there. But I can at least cover a few of the requirements, and some of the more common methods.

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