/etc/dspam/templates/ro/ is in dspam-webfrontend 3.10.1+dfsg-4ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/etc/dspam/templates/ro/nav_admin_error.html
/etc/dspam/templates/ro/nav_admin_preferences.html
/etc/dspam/templates/ro/nav_admin_status.html
/etc/dspam/templates/ro/nav_admin_user.html
/etc/dspam/templates/ro/nav_alerts.html
/etc/dspam/templates/ro/nav_analysis.html
/etc/dspam/templates/ro/nav_error.html
/etc/dspam/templates/ro/nav_fragment.html
/etc/dspam/templates/ro/nav_history.html
/etc/dspam/templates/ro/nav_performance.html
/etc/dspam/templates/ro/nav_preferences.html
/etc/dspam/templates/ro/nav_quarantine.html
/etc/dspam/templates/ro/nav_viewmessage.html