Why do I get "Broken INTERNAL link on xyz", where xyz is NOT the IP address of the server where the website is hosted?
To be more specific: my website address is 'myExample.com' and there is another IP address let's call it 'anotherExample'. I get 'Broken INTERNAL link on anotherExample'. The referrer is 'http://anotherExample/somePHPFile.php' and the Requested URL is of course '/somePHPFile.php'.
You probably have the middleware django.middleware.common.BrokenLinkEmailsMiddleware enabled. According to Django docs it sends broken link notification emails to MANAGERS.
Solution: just remove the BrokenLinkEmailsMiddleware item from MIDDLEWARES in your settings.py.