/var/log/plesk/rc_actions.log
INFO: [Mon Feb 27 18:44:31 CET 2017]: Serice: postfix, Action: status
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:31 CET 2017]: Serice: postfix, Action: reload
Trying to reload service postfix... Feb 27 07:00:16 mail systemd[1]: Unit postfix.service cannot be reloaded because it is inactive.
Feb 27 07:09:49 mail systemd[1]: Unit postfix.service cannot be reloaded because it is inactive.
Feb 27 07:59:45 mail systemd[1]: Unit postfix.service cannot be reloaded because it is inactive.
Feb 27 11:48:00 mail systemd[1]: Unit postfix.service cannot be reloaded because it is inactive.
Feb 27 18:44:31 mail systemd[1]: Unit postfix.service cannot be reloaded because it is inactive.
WARNING!
Some problems are found during reload service postfix(see log file: /var/log/plesk/rc_actions.log)
Continue...
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:33 CET 2017]: Serice: courier-imapd, Action: status
active
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:33 CET 2017]: Serice: courier-imapd, Action: reload
Trying to reload service courier-imapd... active
done
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:33 CET 2017]: Serice: courier-imaps, Action: status
active
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:33 CET 2017]: Serice: courier-imaps, Action: reload
Trying to reload service courier-imaps... active
done
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:34 CET 2017]: Serice: courier-pop3d, Action: status
active
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:34 CET 2017]: Serice: courier-pop3d, Action: reload
Trying to reload service courier-pop3d... active
done
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:34 CET 2017]: Serice: courier-pop3s, Action: status
active
STOP pleskrc
START pleskrc
INFO: [Mon Feb 27 18:44:34 CET 2017]: Serice: courier-pop3s, Action: reload
Trying to reload service courier-pop3s... active
done
STOP pleskrc
START pleskrc
########################
# postfix status
postfix/postfix-script: the Postfix mail system is running: PID: 20010
# postfix stop
postfix/postfix-script: stopping the Postfix mail system
postfix/postfix-script: waiting for the Postfix mail system to terminate
# postfix start
postfix/postfix-script: warning: not set-gid or not owner+group+world executable: /usr/sbin/postdrop
postfix/postfix-script: warning: /usr/lib/sendmail and /usr/sbin/sendmail differ
postfix/postfix-script: warning: Replace one by a symbolic link to the other
postfix/postfix-script: starting the Postfix mail system
# postfix status
postfix/postfix-script: the Postfix mail system is running: PID: 4494
########################
//
https://docs.plesk.com/en-US/onyx/a...pair-utility/plesk-repair-utility-mail.74652/
# plesk repair mail
Repairing the mail server configuration
Reconfigure all domains and mailboxes? [Y/n] y
Reconfiguring all domains and mailboxes ......................... [OK]
Error messages: 0; Warnings: 0; Errors resolved: 0
########################
After plesk repair mail now said postfix status
# postfix status
postfix/postfix-script: the Postfix mail system is not running
########################
So after postfix is
not running the "Certificate for securing mail" is working.
Information: The Lets Encrypt example.com certificate was successfully set to secure the mail server.