If images are not being displayed when you view your emails on your iPhone, try the following tips to resolve the issue:
1. Try exiting out of the message and going back to your inbox. Then tap the message one more time to see if it loads properly.
2. The application to view email does place a limit on the amount of content it will download initially.
3. If the email is too large, scroll to the bottom of the message and look for a button labelled "Download Full Message" or something similar to that. Select the button to let the message download completely. The images should now appear.
To modify the settings on your iPhone to allow images please follow the steps below:
1. Open the settings app.
2. Select "Mail, Contacts, Calendars."
3. Set the "Load Remote Images" to ON.