Thanks Richard... I changed /var/lib/htdig (and below) to being owned by root.mailman and gave the folder group write permisions. This cleared the error report I had ben recieving. Original: drwxr-xr-x 2 root root 4096 Mar 23 16:19 htdig New: drwxrwxr-x 2 root mailman 4096 Mar 23 16:19 htdig