Steps to reproduce:
1. Start portal and login.
2. Add blog portlet to page, add a blog with an image in content (the image is uploaded from DM).
3. Publish the blog, try to visit the blog on mobile device.
User could see the image in content of blog.
Image did not displayed.
1. This occurred on both IOS (OS 8.3) and Android (OS 5) devices.
2. It could not be reproduced if user set virtual host in portal.