Here's how to set up the qmail groups and the qmail users.On some systems there are commands that make this easy. Solaris andLinux:   # groupadd nofiles   # useradd -g nofiles -d /var/qmail/alias alias   # useradd -g nofiles -d /var/qmail qmaild   # useradd -g nofiles -d /var/qmail qmaill   # useradd -g nofiles -d /var/qmail qmailp   # groupadd qmail   # useradd -g qmail -d /var/qmail qmailq   # useradd -g qmail -d /var/qmail qmailr   # useradd -g qmail -d /var/qmail qmailsFreeBSD 2.2:   # pw groupadd nofiles   # pw useradd alias -g nofiles -d /var/qmail/alias -s /nonexistent   # pw useradd qmaild -g nofiles -d /var/qmail -s /nonexistent   # pw useradd qmaill -g nofiles -d /var/qmail -s /nonexistent   # pw useradd qmailp -g nofiles -d /var/qmail -s /nonexistent   # pw groupadd qmail   # pw useradd qmailq -g qmail -d /var/qmail -s /nonexistent   # pw useradd qmailr -g qmail -d /var/qmail -s /nonexistent   # pw useradd qmails -g qmail -d /var/qmail -s /nonexistentBSDI 2.0:   # addgroup nofiles   # adduser -g nofiles -H/var/qmail/alias -G,,, -s/dev/null -P'*' alias   # adduser -g nofiles -H/var/qmail -G,,, -s/dev/null -P'*' qmaild   # adduser -g nofiles -H/var/qmail -G,,, -s/dev/null -P'*' qmaill   # adduser -g nofiles -H/var/qmail -G,,, -s/dev/null -P'*' qmailp   # addgroup qmail   # adduser -g qmail -H/var/qmail -G,,, -s/dev/null -P'*' qmailq   # adduser -g qmail -H/var/qmail -G,,, -s/dev/null -P'*' qmailr   # adduser -g qmail -H/var/qmail -G,,, -s/dev/null -P'*' qmailsAIX:   # mkgroup -A nofiles   # mkuser pgrp=nofiles home=/var/qmail/alias shell=/bin/true alias   # mkuser pgrp=nofiles home=/var/qmail shell=/bin/true qmaild   # mkuser pgrp=nofiles home=/var/qmail shell=/bin/true qmaill   # mkuser pgrp=nofiles home=/var/qmail shell=/bin/true qmailp   # mkgroup -A qmail   # mkuser pgrp=qmail home=/var/qmail shell=/bin/true qmailq   # mkuser pgrp=qmail home=/var/qmail shell=/bin/true qmailr   # mkuser pgrp=qmail home=/var/qmail shell=/bin/true qmailsOn other systems, you will have to edit /etc/group and /etc/passwdmanually. First add two new lines to /etc/group, something like        qmail:*:2107:        nofiles:*:2108:where 2107 and 2108 are different from the other gids in /etc/group.Next (using vipw) add six new lines to /etc/passwd, something like        alias:*:7790:2108::/var/qmail/alias:/bin/true        qmaild:*:7791:2108::/var/qmail:/bin/true        qmaill:*:7792:2108::/var/qmail:/bin/true        qmailp:*:7793:2108::/var/qmail:/bin/true        qmailq:*:7794:2107::/var/qmail:/bin/true        qmailr:*:7795:2107::/var/qmail:/bin/true        qmails:*:7796:2107::/var/qmail:/bin/truewhere 7790 through 7796 are _new_ uids, 2107 is the qmail gid, and 2108is the nofiles gid. Make sure you use the nofiles gid for qmaild,qmaill, qmailp, and alias, and the qmail gid for qmailq, qmailr, andqmails.