Given that businesses can track when (and from what IP) recipients open those emails through tracking images, that's not likely to ever happen.
Although, of course, you can always choose not to open html emails as html.
Although, of course, you can always choose not to open html emails as html.
Many e-mail clients will not show images from e-mail addresses that are not in your contacts list for this reason (for example, Thunderbird). They make the user click a button to make the decision to proceed with the image download an explicit action.