adobe campaign - Image hosting location issue

We get the above instance from the Adobe campaign team to all the existing images hosted on the location https://www.elsevier.com/__data/assets/image/.
however, if I re-upload the same images to the file repository http://media.journals.elsevier.com/content/files/, it resolves the issue.
I am totally unaware of the Campaign execution, but I would like to avoid this double work just for HTMLs creation, is this something to do the configuration with Adobe campaign 7 to allow all urls?
Just thinking if the images uploaded to the host http://media.journals.elsevier.com/content/files/
can execute the campaign with a larger group of recipients, then the same image uploaded to https://www.elsevier.com/__data/assets/image/ should also be working, if the image is publically visible.
-Adobe campaign experts please advise
In few chances, we were successfully able to send something using images hosted on the location https://www.elsevier.com/__data/assets/image/ if we run tests/proofing. The issue is not definitely being caused by images hosted on the dataset location. Sometimes the mailings work with images from here, sometimes they don’t. It tends to be large-scale mailings that fail. The dataset image hosting location is the only common thread, so we are rehosting all the images.
do I have any solution to fix this issue that avoids double-work(re-hosting) of images