/usr/share/doc/mailutils-pop3d/TODO is in mailutils-pop3d 1:3.4-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/mailutils-pop3d/../libmailutils5/TODO
/usr/share/doc/mailutils-pop3d/../libmailutils5/TODO