/usr/share/doc/courier-pop/NEWS.Debian.gz is in courier-pop 0.78.0-2ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/courier-pop/../courier-base/NEWS.Debian.gz
/usr/share/doc/courier-pop/../courier-base/NEWS.Debian.gz