ls -l /var/lib/mailman

drwxrwsr-x 4 mailman mailman 4096 Jun  6 15:26 archives
drwxrwsr-x 2 mailman mailman 4096 Jun  8 13:06 data
drwxrwsr-x 6 mailman mailman 4096 Jun  7 22:38 lists
drwxrwsr-x 2 mailman mailman 4096 Oct  9  2006 spam

ls -l /usr/lib/mailman

drwxrwsr-x 11 root mailman 4096 Jun  8 13:45 Mailman
drwxrwsr-x  2 root mailman 4096 Jun  6 15:26 bin
drwxrwsr-x  2 root mailman 4096 Jun  6 15:26 cgi-bin
drwxrwsr-x  2 root mailman 4096 Jun  6 15:26 cron
drwxrwsr-x  2 root mailman 4096 Jun  6 15:26 icons
drwxrwsr-x  2 root mailman 4096 Jun  6 15:26 mail
drwxrwsr-x 34 root mailman 4096 Jun  6 15:26 messages
drwxrwsr-x  6 root mailman 4096 Jun  6 15:26 pythonlib
drwxrwsr-x  2 root mailman 4096 Jun  6 15:26 scripts
drwxrwsr-x 35 root mailman 4096 Jun  6 15:26 templates
drwxrwsr-x  4 root mailman 4096 Jun  6 15:26 tests