If you use Gmail for your primary email address, I’m sure you’ve seen the button at the top of all of your emails that you have to tap to display images in messages. The reasoning behind it is sound; it’s a security measure that keeps your inbox safe. Even if it’s just a safety thing, though, it can still be pretty annoying to have to tap that every time you get email from a new sender.
Thanks to some improvements in Gmail, the “Display images below” button is soon going to be a thing of the past. Google is planning on routing all email messages through their own proxy server, then displaying them in your inbox which helps them to make sure the images are secure and removes that button in one move. This will make your inbox faster, more secure, and more importantly, it’ll look better thanks to filled in images.
If you’re not okay with the change, Google says you can still keep the old method of having to approve images before they’ll display. This can help people that are trying to manage extremely small data caps, or someone that just doesn’t like the extra fluff of images in their emails. The change should be rolling out to Android apps in early 2014.
source: Gmail Blog