if [ ! -e $INSTALL_ROOT/etc/mail/local-host-names ]; then
  hostname  -s  >   $INSTALL_ROOT/etc/mail/local-host-names  2>/dev/null
  hostname  -f  >   $INSTALL_ROOT/etc/mail/local-host-names  2>/dev/null
  hostname  -a  >>  $INSTALL_ROOT/etc/mail/local-host-names  2>/dev/null
fi  &&

if [ ! -e $INSTALL_ROOT/etc/mail/relay-domains ]; then
  hostname  -d  >  $INSTALL_ROOT/etc/mail/relay-domains  2>/dev/null
fi
