Submitted Images links showing 401 after migration

Hi I need help with my images.

We have migrated the website and the old images attached to the email from user are not viewable anymore. New submissions are ok and working. We made sure that the images are uploaded on our ftp. Seems like its not recognizing the links. We also reset the permalinks and did not resolve it.

Old image attachment via email:

New image submissions:

Thanks in advanced.