sorry for mixed up command above, but the result is the same:
[root@vps196134 ~]# cat /var/log/maillog
Jul 22 04:54:01 vps196134 postfix/postfix-script[950]: starting the Postfix mail system
Jul 22 04:54:01 vps196134 postfix/master[952]: daemon started -- version 2.10.1, configuration /etc/postfix
Jul 22 05:50:40 vps196134 postfix/postfix-script[939]: starting the Postfix mail system
Jul 22 05:50:40 vps196134 postfix/master[941]: daemon started -- version 2.10.1, configuration /etc/postfix
Jul 22 05:58:12 vps196134 postfix/postfix-script[1019]: warning: not owned by root: /etc/postfix/vacation.php
Jul 22 05:58:12 vps196134 postfix/postfix-script[1038]: starting the Postfix mail system
Jul 22 05:58:12 vps196134 postfix/master[1040]: daemon started -- version 2.10.1, configuration /etc/postfix
Jul 22 08:43:31 vps196134 postfix/smtpd[16349]: connect from mta2.gkeue95wf.eu[170.75.175.69]
Jul 22 08:43:31 vps196134 postfix/smtpd[16349]: C07CF2DE2: client=mta2.gkeue95wf.eu[170.75.175.69]
Jul 22 08:43:31 vps196134 postfix/cleanup[16359]: C07CF2DE2: message-id=<92ab7405c3b2063011efa5c836f1c753@gkeue95wf.eu>
Jul 22 08:43:31 vps196134 postfix/qmgr[1042]: C07CF2DE2: from=<admin@gkeue95wf.eu>, size=5430, nrcpt=1 (queue active)
Jul 22 08:43:31 vps196134 postfix/smtpd[16349]: disconnect from mta2.gkeue95wf.eu[170.75.175.69]
Jul 22 08:43:32 vps196134 postfix/pipe[16362]: C07CF2DE2: to=<admin@baiagmumr5g.eu>, relay=dovecot, delay=0.25, delays=0.07/0.04/0/0.14, dsn=2.0.0, status=sent (delivered via dovecot service)
Jul 22 08:43:32 vps196134 postfix/qmgr[1042]: C07CF2DE2: removed
Jul 22 08:46:52 vps196134 postfix/anvil[16352]: statistics: max connection rate 1/60s for (smtp:170.75.175.69) at Jul 22 08:43:31
Jul 22 08:46:52 vps196134 postfix/anvil[16352]: statistics: max connection count 1 for (smtp:170.75.175.69) at Jul 22 08:43:31
Jul 22 08:46:52 vps196134 postfix/anvil[16352]: statistics: max cache size 1 at Jul 22 08:43:31
Jul 22 08:55:53 vps196134 postfix/smtpd[17281]: connect from mta1.gq71bposw.eu[170.75.175.17]
Jul 22 08:55:53 vps196134 postfix/smtpd[17281]: 67FA02DE2: client=mta1.gq71bposw.eu[170.75.175.17]
Jul 22 08:55:53 vps196134 postfix/cleanup[17290]: 67FA02DE2: message-id=<a94408275de07fd19b4958c2e03d5746@gq71bposw.eu>
Jul 22 08:55:53 vps196134 postfix/qmgr[1042]: 67FA02DE2: from=<admin@gq71bposw.eu>, size=5430, nrcpt=1 (queue active)
Jul 22 08:55:53 vps196134 postfix/pipe[17292]: 67FA02DE2: to=<admin@baiagmumr5g.eu>, relay=dovecot, delay=0.09, delays=0.05/0.01/0/0.02, dsn=2.0.0, status=sent (delivered via dovecot service)
Jul 22 08:55:53 vps196134 postfix/qmgr[1042]: 67FA02DE2: removed
Jul 22 08:55:53 vps196134 postfix/smtpd[17281]: disconnect from mta1.gq71bposw.eu[170.75.175.17]
Jul 22 08:59:13 vps196134 postfix/anvil[17284]: statistics: max connection rate 1/60s for (smtp:170.75.175.17) at Jul 22 08:55:53
Jul 22 08:59:13 vps196134 postfix/anvil[17284]: statistics: max connection count 1 for (smtp:170.75.175.17) at Jul 22 08:55:53
Jul 22 08:59:13 vps196134 postfix/anvil[17284]: statistics: max cache size 1 at Jul 22 08:55:53
Jul 22 09:00:14 vps196134 postfix/smtpd[17728]: connect from mta1.hgd4gft.eu[170.75.175.189]
Jul 22 09:00:14 vps196134 postfix/smtpd[17728]: EA2052DE3: client=mta1.hgd4gft.eu[170.75.175.189]
Jul 22 09:00:14 vps196134 postfix/cleanup[17738]: EA2052DE3: message-id=<7dede34a447f4c95faca1520b5d57208@hgd4gft.eu>
Jul 22 09:00:15 vps196134 postfix/qmgr[1042]: EA2052DE3: from=<info@hgd4gft.eu>, size=5376, nrcpt=1 (queue active)
Jul 22 09:00:15 vps196134 postfix/smtpd[17728]: disconnect from mta1.hgd4gft.eu[170.75.175.189]
Jul 22 09:00:15 vps196134 postfix/pipe[17740]: EA2052DE3: to=<admin@baiagmumr5g.eu>, relay=dovecot, delay=0.09, delays=0.05/0.01/0/0.02, dsn=2.0.0, status=sent (delivered via dovecot service)
Jul 22 09:00:15 vps196134 postfix/qmgr[1042]: EA2052DE3: removed
Jul 22 09:03:35 vps196134 postfix/anvil[17730]: statistics: max connection rate 1/60s for (smtp:170.75.175.189) at Jul 22 09:00:14
Jul 22 09:03:35 vps196134 postfix/anvil[17730]: statistics: max connection count 1 for (smtp:170.75.175.189) at Jul 22 09:00:14
Jul 22 09:03:35 vps196134 postfix/anvil[17730]: statistics: max cache size 1 at Jul 22 09:00:14
Jul 22 09:19:01 vps196134 postfix/smtpd[19206]: connect from mta3.gkeue95wf.eu[170.75.175.21]
Jul 22 09:19:02 vps196134 postfix/smtpd[19206]: 0A2932DE3: client=mta3.gkeue95wf.eu[170.75.175.21]
Jul 22 09:19:02 vps196134 postfix/cleanup[19214]: 0A2932DE3: message-id=<5fb0c8a86b82521c1b5fba8575eaa596@gkeue95wf.eu>
Jul 22 09:19:02 vps196134 postfix/qmgr[1042]: 0A2932DE3: from=<admin@gkeue95wf.eu>, size=4575, nrcpt=1 (queue active)
Jul 22 09:19:02 vps196134 postfix/smtpd[19206]: disconnect from mta3.gkeue95wf.eu[170.75.175.21]
Jul 22 09:19:02 vps196134 postfix/pipe[19216]: 0A2932DE3: to=<admin@baiagmumr5g.eu>, relay=dovecot, delay=0.1, delays=0.05/0.01/0/0.03, dsn=2.0.0, status=sent (delivered via dovecot service)
Jul 22 09:19:02 vps196134 postfix/qmgr[1042]: 0A2932DE3: removed
Jul 22 09:22:22 vps196134 postfix/anvil[19208]: statistics: max connection rate 1/60s for (smtp:170.75.175.21) at Jul 22 09:19:01
Jul 22 09:22:22 vps196134 postfix/anvil[19208]: statistics: max connection count 1 for (smtp:170.75.175.21) at Jul 22 09:19:01
Jul 22 09:22:22 vps196134 postfix/anvil[19208]: statistics: max cache size 1 at Jul 22 09:19:01
Jul 22 10:26:02 vps196134 postfix/postfix-script[1015]: warning: not owned by root: /etc/postfix/vacation.php
Jul 22 10:26:02 vps196134 postfix/postfix-script[1034]: starting the Postfix mail system
Jul 22 10:26:02 vps196134 postfix/master[1037]: daemon started -- version 2.10.1, configuration /etc/postfix
Jul 22 10:35:03 vps196134 postfix/pickup[1038]: 03DC12DE4: uid=0 from=<root>
Jul 22 10:35:03 vps196134 postfix/cleanup[2044]: 03DC12DE4: message-id=<20180722143503.03DC12DE4@vps196134.vps.ovh.ca>
Jul 22 10:35:03 vps196134 postfix/qmgr[1039]: 03DC12DE4: from=<root@vps196134.vps.ovh.ca>, size=750, nrcpt=1 (queue active)
Jul 22 10:35:03 vps196134 postfix/local[2051]: 03DC12DE4: to=<root@vps196134.vps.ovh.ca>, orig_to=<root>, relay=local, delay=0.14, delays=0.11/0.02/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)
Jul 22 10:35:03 vps196134 postfix/qmgr[1039]: 03DC12DE4: removed
Jul 22 16:30:17 vps196134 postfix/smtpd[29161]: connect from mta1.hgd4gft.eu[170.75.175.189]
Jul 22 16:30:17 vps196134 postfix/smtpd[29161]: 8EF882DC8: client=mta1.hgd4gft.eu[170.75.175.189]
Jul 22 16:30:17 vps196134 postfix/cleanup[29172]: 8EF882DC8: message-id=<64f29bb2333283897f8ba58a18574718@hgd4gft.eu>
Jul 22 16:30:17 vps196134 postfix/qmgr[1039]: 8EF882DC8: from=<bounce@hgd4gft.eu>, size=5471, nrcpt=1 (queue active)
Jul 22 16:30:17 vps196134 postfix/smtpd[29161]: disconnect from mta1.hgd4gft.eu[170.75.175.189]
Jul 22 16:30:17 vps196134 postfix/pipe[29174]: 8EF882DC8: to=<admin@baiagmumr5g.eu>, relay=dovecot, delay=0.13, delays=0.06/0.02/0/0.05, dsn=2.0.0, status=sent (delivered via dovecot service)
Jul 22 16:30:17 vps196134 postfix/qmgr[1039]: 8EF882DC8: removed
Jul 22 16:33:37 vps196134 postfix/anvil[29164]: statistics: max connection rate 1/60s for (smtp:170.75.175.189) at Jul 22 16:30:17
Jul 22 16:33:37 vps196134 postfix/anvil[29164]: statistics: max connection count 1 for (smtp:170.75.175.189) at Jul 22 16:30:17
Jul 22 16:33:37 vps196134 postfix/anvil[29164]: statistics: max cache size 1 at Jul 22 16:30:17
Jul 22 16:58:22 vps196134 postfix/smtpd[31638]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:58:22 vps196134 postfix/smtpd[31638]: connect from unknown[192.158.224.193]
Jul 22 16:58:22 vps196134 postfix/smtpd[31638]: lost connection after CONNECT from unknown[192.158.224.193]
Jul 22 16:58:22 vps196134 postfix/smtpd[31638]: disconnect from unknown[192.158.224.193]
Jul 22 16:58:32 vps196134 postfix/smtpd[31638]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:58:32 vps196134 postfix/smtpd[31638]: connect from unknown[192.158.224.193]
Jul 22 16:58:32 vps196134 postfix/smtpd[31638]: NOQUEUE: reject: RCPT from unknown[192.158.224.193]: 454 4.7.1 <chevyview450@gmail.com>: Relay access denied; from=<test@ip-167-114-98.net> to=<chevyview450@gmail.com> proto=SMTP helo=<win-clj1b0gq6jp.domain>
Jul 22 16:58:38 vps196134 postfix/smtpd[31659]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:58:38 vps196134 postfix/smtpd[31659]: connect from unknown[192.158.224.193]
Jul 22 16:58:40 vps196134 postfix/smtpd[31659]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 16:58:44 vps196134 postfix/smtpd[31672]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:58:44 vps196134 postfix/smtpd[31672]: connect from unknown[192.158.224.193]
Jul 22 16:58:49 vps196134 postfix/smtpd[31638]: lost connection after RCPT from unknown[192.158.224.193]
Jul 22 16:58:49 vps196134 postfix/smtpd[31638]: disconnect from unknown[192.158.224.193]
Jul 22 16:58:51 vps196134 postfix/smtpd[31672]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 16:58:52 vps196134 postfix/smtpd[31638]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:58:52 vps196134 postfix/smtpd[31638]: connect from unknown[192.158.224.193]
Jul 22 16:59:01 vps196134 postfix/smtpd[31659]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 16:59:01 vps196134 postfix/smtpd[31659]: disconnect from unknown[192.158.224.193]
Jul 22 16:59:02 vps196134 postfix/smtpd[31638]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 16:59:03 vps196134 postfix/smtpd[31659]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:59:03 vps196134 postfix/smtpd[31659]: connect from unknown[192.158.224.193]
Jul 22 16:59:08 vps196134 postfix/smtpd[31672]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 16:59:08 vps196134 postfix/smtpd[31672]: disconnect from unknown[192.158.224.193]
Jul 22 16:59:13 vps196134 postfix/smtpd[31659]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: Connection lost to authentication server
Jul 22 16:59:15 vps196134 postfix/smtpd[31672]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:59:15 vps196134 postfix/smtpd[31672]: connect from unknown[192.158.224.193]
Jul 22 16:59:17 vps196134 postfix/smtpd[31672]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 16:59:17 vps196134 postfix/smtpd[31638]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 16:59:17 vps196134 postfix/smtpd[31638]: disconnect from unknown[192.158.224.193]
Jul 22 16:59:17 vps196134 postfix/smtpd[31638]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:59:17 vps196134 postfix/smtpd[31638]: connect from unknown[192.158.224.193]
Jul 22 16:59:24 vps196134 postfix/smtpd[31638]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 16:59:27 vps196134 postfix/smtpd[31672]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 16:59:27 vps196134 postfix/smtpd[31672]: disconnect from unknown[192.158.224.193]
Jul 22 16:59:27 vps196134 postfix/smtpd[31659]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 16:59:27 vps196134 postfix/smtpd[31659]: disconnect from unknown[192.158.224.193]
Jul 22 16:59:29 vps196134 postfix/smtpd[31672]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:59:29 vps196134 postfix/smtpd[31672]: connect from unknown[192.158.224.193]
Jul 22 16:59:39 vps196134 postfix/smtpd[31672]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jul 22 16:59:44 vps196134 postfix/smtpd[31659]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 16:59:44 vps196134 postfix/smtpd[31659]: connect from unknown[192.158.224.193]
Jul 22 16:59:48 vps196134 postfix/smtpd[31638]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 16:59:48 vps196134 postfix/smtpd[31638]: disconnect from unknown[192.158.224.193]
Jul 22 16:59:54 vps196134 postfix/smtpd[31659]: warning: unknown[192.158.224.193]: SASL LOGIN authentication failed: Connection lost to authentication server
Jul 22 17:00:02 vps196134 postfix/smtpd[31638]: warning: hostname pje31.gainful.fora-da-caixa.com does not resolve to address 192.158.224.193: Name or service not known
Jul 22 17:00:02 vps196134 postfix/smtpd[31638]: connect from unknown[192.158.224.193]
Jul 22 17:00:03 vps196134 postfix/smtpd[31672]: lost connection after AUTH from unknown[192.158.224.193]
Jul 22 17:00:03 vps196134 postfix/smtpd[31672]: disconnect from unknown[192.158.224.193]
Thanks