Plesk Ubutnu Qmail runs in shell but not in Plesk Services Management

the weirdest thing happened... /etc/init.d/qmail restart wouldn't give any errors. however, trying to restart with plesk services management and the service would never start. this is because plesk checks Qmail with: telnet localhost 25 AND /usr/local/psa/admin/bin/mailmng --status-smtpd hmmm, qmail is running with the status check but not listening / bound to port 25. what controls this on ubuntu? xinet.d... turns out after upgrade, my /etc/xinetd.d/smtp_psa file was empty!!! i created a new one stmp_psa xinet.d file: service smtp { id = smtp-localhost socket_type = stream protocol = tcp wait = no disable = no user = root instances = UNLIMITED bind = localhost server = /var/qmail/bin/tcp-env server_args = /var/qmail/bin/relaylock /var/qmail/bin/qmail-smtpd /var/qmail/bin/smtp_auth /var/qmail/bin/true /var/qmail/bin/cmd5checkpw /var/qmail/bin/true } after saving smtp_psa file i restarted xinet.d and QMail is working again... /etc/init.d/xinetd restart