Comment by nemeth

> The whole point of not loading images is the privacy concern, so if your email client (which is any email client with any kind of traction in the past decade) offers (and defaults to) not loading images, it will indeed not hit the URL.

I'm not sure this is accurate, this link is a little old but it indicates quite a few webmail/desktop clients load images by default: http://www.campaignmonitor.com/blog/post/2559/current-condit...