Previous version of Gmail was not allowing to show images in your incoming mail because Google do this to help protect privacy from spammers, who can use images and link to verify that e-mail address is real.but most of the messages you get with images from your friends and family so to resolve this problem Google decided to start displaying images by default. now , whenever some on you have e-mailed at least twice send you a message containing images you will see them right away.
when you get any message with images . Gmail shows you following two option.
1. Display image Below
2. Always display image es from xyz@xyz.com
if you prefer to go back to the things were, you can choose not to display image from certain senders or from anyone . to disable images from an individual sender , click " do not display from now on " under the show detail.