I used to be under the impression that the Gmail proxy protects you from this, but then I learned (on a different HN thread) that this is only partially true. I

I used to be under the impression that the Gmail proxy protects you from this, but then I learned (on a different HN thread) that this is only partially true. It protects you from the sender harvesting the user agent etc, but it still only fetches the images when you open the email, so still leaks information. This promoted me to disable automatic image loading in gmail.