/usr/share/man/man1/virt_mail.1.gz is in virtuoso-opensource-6.1-bin 6.1.4+dfsg1-0ubuntu1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/VIRT_MAIL.1.gz
/usr/share/man/man1/VIRT_MAIL.1.gz