When reading html email, this note appears at the top of each email message:

External images are not displayed. Click here to display external images.

Once this has been selected, the images show up. Is there any option/setting to either disable this behaviour on a global basis, or can each user toggle this on or off? After a few times, especially with trusted senders and ESPECIALLY when going back to the same message it is annoying to have to click the link at the top each time.