SMTP Service not working after 9.2.1 Update!

[evydaemon]

Service qmail-send starts up fine as status reports but service is not available.
SMTP Service on port 25 is down.

I checked the firewall - all correct.
Alternative SMTP Port is not checked in Plesk Panel Mail settings.

This Problem occured since 9.0.2 was successfully updated to 9.2.1.

 

[Satoriya]

1) Please, make sure the following files exit on the server:

For RPM based system:
[root@plesk902 ~]# cat /etc/xinetd.d/smtp_psa
service smtp
{
socket_type = stream
protocol = tcp
wait = no
disable = no
user = root
instances = UNLIMITED
env = SMTPAUTH=1
server = /var/qmail/bin/tcp-env
server_args = -Rt0 /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
}

[root@plesk902 ~]# cat /etc/xinetd.d/smtps_psa
service smtps
{
socket_type = stream
protocol = tcp
wait = no
disable = no
user = root
instances = UNLIMITED
env = SMTPAUTH=1
server = /var/qmail/bin/tcp-env
server_args = -Rt0 /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
}
[root@plesk902 ~]#

For DEB based system these lines should exist in /etc/inetd.conf config and should not be commented:
psa860:~# grep smtp /etc/inetd.conf
smtp stream tcp nowait.1000 root /var/qmail/bin/tcp-env tcp-env /usr/bin/env SMTPAUTH=1 END=1 /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
smtps stream tcp nowait.1000 root /var/qmail/bin/tcp-env tcp-env /usr/bin/env SMTPAUTH=1 END=1 /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
psa860:~#

2) Restart xinetd or inetd service depending on your system:
# /etc/init.d/inetd restart
# /etc/init.d/xinetd restart

If it does not help, review /var/log/messages and /usr/local/psa/var/log/maillog for the errors.