[Mailman-Users] Add or remove local accounts to a mailing list automatically

[George F]

Hi all,
 
 I need to setup a mailing list, that is going to be used only by our internal mail users.
 
 I installed mailman 2.1.9 on my system (RedHat 5.2) and I created the mailing list.
 
 How can I add the local accounts (i.e. the Linux system accounts) to that list? Can this list be updated automatically every time I add or remove a local account?
 
 Thanks in advance,
 
George.