[Mailman-Users] Mailman Problem

[d3v1ous at d3v1ous.info]

root at router:~# cat /etc/passwd | grep mailman
root at router:~#

I not have mailman user.

root at router:~# cat /etc/mailman/mm_cfg.py | grep MAILMAN
MAILMAN_UID = 'list'
MAILMAN_GID = 'daemon'
MAILMAN_SITE_LIST = 'mailman'
root at router:~#

I try to run mailman with postfix owned aliases but same problem.

root at router:~# cd /var/lib/mailman/data
root at router:/var/lib/mailman/data# ls -l
total 36
-rw-r--r-- 1 postfix postfix     0 2008-09-04 10:40 aliases
-rw-r--r-- 1 postfix postfix 12288 2008-09-04 10:40 aliases.db
-rw-r--r-- 1 postfix postfix    89 2008-09-05 09:56 chown
-rw-r--r-- 1 postfix postfix    10 2008-09-03 15:46 last_mailman_version
-rw-r--r-- 1 postfix postfix 14114 2007-02-28 23:35 sitelist.cfg
root at router:/var/lib/mailman/data#

Howto see mailman run group, and howto change it? I dont want to change workgroup on postfix cuz i installed spamassassin and clamav, and if i make some changes on postfix the lastest software will not work.