I am using IE8 browser on Windows Xp. Till last fortnight I was able to see Images in my Gmail. But all of a sudden, when I try to open any email containing images, I get security warning from Microsoft firewall that webpage contains content not through HTTPS secure connection. I want to know what setting has got changed. Is it due to some update from Microsoft or Gmail has made certain changes. I've tried solving the problem by changing security settings from internet options to default. Adding Google & Gmail as trusted sites. But problem is not solved. Gmail setting for always display images is ineffective. It seems that Images are filtered at the server before email is downloaded in my Laptop.
Go to Internet Options
Go to Security
Click on the Internet icon
Click on the Custom level button
Scroll down and near the bottom, look for "Display Mixed Content"
Change it to Enable
Display video and animation on a webpage that does not use external media player - Enable