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.