Email Image Spoofing

Spammers put images in emails to see if anyone is reading them. Instead of providing spammers this useful information, email servers should instead load EVERY image in the email and cache them for the end user, even for emails to invalid addresses. (Obviously some bandwidth limiting will be necessary to avoid DoS attacks.) Once the spammers pick up on the fact that they'll always receive false positives from the servers, the information provided by loading images will no longer be useful.

The purpose here is to allow end users to see the images in the email without having to override a security warning and without having to compromise their online identity.