super restricted user

From: Stoil Valchkov (ssv_1234_at_hotmail.com)
Date: 09/10/04


Date: Fri, 10 Sep 2004 09:39:56 +0300

Hi,

How can I create super restricted user? For example dedicated for kind of
service - mail server, proxy, etc..
What rights are assigned to user if it is not memeber of any group?