The other day a friend emailed me from her iPhone and her email had a photo attached that she had taken with the same phone. When I opened the email on my iPhone (yahoo mail), the photo was visible. Since then she has sent me several more and now all I see in the body of the email is a blue box with a white question mark in it. If I open the email on my iMac, the photo is visible. How do I get the photos to show back up on my iPhone?