When viewing some emails in Microsoft Outlook, if the sender has included images, I get the following option appear at the top of the email:
"To help protect your privacy, Outlook prevented automatic download of some pictures in this message"
I am unsure how preventing the download of images in an email will protect my privacy. Is this mainly so people who might be looking over my shoulder can't see the visual contents of my email? Or is there a more technical reason; for example, to prevent the use of some kind of exploit in the image format itself (something like What is the corrupted image vulnerability? How does it work?)?
If it's the latter, why would the notice specifically mention privacy, as opposed to security? I guess this last question could come down to "because the guy/girl who wrote the notice wrote 'privacy'", or even "because 'privacy' is one of those terms that the general public can relate to", but I'd be interested to know if there's more to it.