/usr/share/man/man8/esmtpd-ssl.8.gz is in courier-mta-ssl 0.68.2-1ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man8/esmtpd.8.gz
/usr/share/man/man8/esmtpd.8.gz