We use a LOT of screen shots on this website and in our emails. We hope that you see them as a picture is worth a thousand words and when you respond, it helps me remember what the conversation was about. See instructions below.
Try restarting or rebooting the phone.
Verify that your cellular carrier supports Multimedia Messaging Service (MMS) which is standard way to send messages that include multimedia content to and from mobile phones. It extends the core SMS (Short Message Service) capability Wikipedia Apple.com
For more details – Visit the Apple Forum
There are a number of other settings in the Mail, Contacts, Calendars screen:
•Load Remote Images – Slide this to On/Green to load images in emails–like email newsletters–that are part of messages About.com
If we send you an image, it helps greatly, if you return the image in your answer. The work around seems to be to forward the email to us, rather than hitting the reply button. (StackExchange.com)