i run the commands again and here is the results :
root@mail:~# systemctl status rsyslog.service
● rsyslog.service - System Logging Service
Loaded: loaded (/lib/systemd/system/rsyslog.service; enabled; vendor preset: enabled)
Active: active (running) since Sun 2019-06-09 16:34:33 CEST; 1h 8min ago
Docs: man:rsyslogd(8)
http://www.rsyslog.com/doc/
Main PID: 1115 (rsyslogd)
Tasks: 4 (limit: 2299)
CGroup: /system.slice/rsyslog.service
└─1115 /usr/sbin/rsyslogd -n
Jun 09 16:34:32 mail.gencmehmetoglu.engineer systemd[1]: Starting System Logging Service...
Jun 09 16:34:33 mail.gencmehmetoglu.engineer rsyslogd[1115]: imuxsock: Acquired UNIX socket '/run/systemd/journal/syslog' (fd 3) from systemd. [v8.32.0]
Jun 09 16:34:33 mail.gencmehmetoglu.engineer rsyslogd[1115]: rsyslogd's groupid changed to 106
Jun 09 16:34:33 mail.gencmehmetoglu.engineer rsyslogd[1115]: rsyslogd's userid changed to 102
Jun 09 16:34:33 mail.gencmehmetoglu.engineer rsyslogd[1115]: [origin software="rsyslogd" swVersion="8.32.0" x-pid="1115" x-info="http://www.rsyslog.com"] start
Jun 09 16:34:33 mail.gencmehmetoglu.engineer systemd[1]: Started System Logging Service.
root@mail:~# journalctl -xe
-- Subject: Unit UNIT has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit UNIT has finished starting up.
--
-- The start-up result is RESULT.
Jun 09 17:42:58 mail.gencmehmetoglu.engineer systemd[1]: Started User Manager for UID 1000.
-- Subject: Unit user@1000.service has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit user@1000.service has finished starting up.
--
-- The start-up result is RESULT.
Jun 09 17:42:58 mail.gencmehmetoglu.engineer systemd[17279]: Reached target Default.
-- Subject: Unit UNIT has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- Unit UNIT has finished starting up.
--
-- The start-up result is RESULT.
Jun 09 17:42:58 mail.gencmehmetoglu.engineer systemd[17279]: Startup finished in 83ms.
-- Subject: User manager start-up is now complete
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
--
-- The user manager instance for user 1000 has been started. All services queued
-- for starting have been started. Note that other services might still be starting
-- up or be started at any later time.
--
-- Startup of the manager took 83284 microseconds.
Jun 09 17:43:08 mail.gencmehmetoglu.engineer sudo[17392]: xxxx: TTY=pts/0 ; PWD=/home/xxxx; USER=root ; COMMAND=/bin/su -
Jun 09 17:43:08 mail.gencmehmetoglu.engineer sudo[17392]: pam_unix(sudo:session): session opened for user root by xxxx(uid=0)
Jun 09 17:43:08 mail.gencmehmetoglu.engineer su[17393]: Successful su for root by root
Jun 09 17:43:08 mail.gencmehmetoglu.engineer su[17393]: + /dev/pts/0 root:root
Jun 09 17:43:08 mail.gencmehmetoglu.engineer su[17393]: pam_unix(su:session): session opened for user root by xxxx(uid=0)
Jun 09 17:43:08 mail.gencmehmetoglu.engineer su[17393]: pam_systemd(su:session): Cannot create session: Already running in a session
Jun 09 17:43:15 mail.gencmehmetoglu.engineer dovecot[1268]: imap-login: Login: user=<postmaster@gencmehmetoglu.engineer>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=17410, secured, se
Jun 09 17:43:15 mail.gencmehmetoglu.engineer dovecot[1268]: imap(postmaster@gencmehmetoglu.engineer): Logged out in=389 out=2091
Jun 09 17:43:40 mail.gencmehmetoglu.engineer dovecot[1268]: imap-login: Login: user=<postmaster@gencmehmetoglu.engineer>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=17418, secured, se
Jun 09 17:43:40 mail.gencmehmetoglu.engineer dovecot[1268]: imap(postmaster@gencmehmetoglu.engineer): Logged out in=347 out=3746
Jun 09 17:44:41 mail.gencmehmetoglu.engineer dovecot[1268]: imap-login: Login: user=<postmaster@gencmehmetoglu.engineer>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=17428, secured, se
Jun 09 17:44:41 mail.gencmehmetoglu.engineer dovecot[1268]: imap(postmaster@gencmehmetoglu.engineer): Logged out in=347 out=3746
Jun 09 17:45:42 mail.gencmehmetoglu.engineer dovecot[1268]: imap-login: Login: user=<postmaster@gencmehmetoglu.engineer>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=17442, secured, se
Jun 09 17:45:42 mail.gencmehmetoglu.engineer dovecot[1268]: imap(postmaster@gencmehmetoglu.engineer): Logged out in=347 out=3746
Jun 09 17:45:42 mail.gencmehmetoglu.engineer php-fpm[1108]: [NOTICE] [pool inet] child 16927 exited with code 0 after 1414.462683 seconds from start
Jun 09 17:45:42 mail.gencmehmetoglu.engineer php-fpm[1108]: [NOTICE] [pool inet] child 17443 started
lines 1332-1380/1380 (END)