Same as T110609: publish statistics about number of held messages per list but >5y later. At that time, it was:
@sodium:/var/lib/mailman/restore/var/lib/mailman/data# find . | sed -e "s/pck//g" -e "s/[0-9]//g" | sort | uniq -c | sort -nr | sed -e "s/\.\/heldmsg-//g" -e "s/\.//g" > held_msg_stats_mailman.txt @sodium:/var/lib/mailman/restore/var/lib/mailman/data# head -n 50 held_msg_stats_mailman.txt