Sep 10 18:37:06 kopano4s postfix/smtpd[30066]: connect from localhost[127.0.0.1]
Sep 10 18:37:06 kopano4s postfix/smtpd[30066]: 6244B1D7: client=localhost[127.0.0.1]
Sep 10 18:37:06 kopano4s postfix/cleanup[30069]: 6244B1D7: message-id=<kcis.B0938631EA564F50BD2C0FA09A03239C@kopano4s.pognerschmitt.de>
Sep 10 18:37:06 kopano4s postfix/qmgr[5376]: 6244B1D7: from=<mail@pogner-schmitt.de>, size=924, nrcpt=1 (queue active)
Sep 10 18:37:06 kopano4s postfix/smtpd[30066]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=1 quit=1 commands=5
Sep 10 18:37:11 kopano4s postfix/smtpd[30079]: connect from localhost[127.0.0.1]
Sep 10 18:37:11 kopano4s postfix/smtpd[30079]: 170961E2: client=localhost[127.0.0.1]
Sep 10 18:37:11 kopano4s postfix/cleanup[30069]: 170961E2: message-id=<kcis.B0938631EA564F50BD2C0FA09A03239C@kopano4s.pognerschmitt.de>
Sep 10 18:37:11 kopano4s postfix/qmgr[5376]: 170961E2: from=<mail@pogner-schmitt.de>, size=1390, nrcpt=1 (queue active)
Sep 10 18:37:11 kopano4s postfix/lmtp[30070]: 6244B1D7: to=<mailtestsystem1234@gmail.com>, relay=127.0.0.1[127.0.0.1]:10024, delay=5.1, delays=0.23/0.04/0.24/4.6, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 170961E2)
Sep 10 18:37:11 kopano4s postfix/qmgr[5376]: 6244B1D7: removed
Sep 10 18:37:11 kopano4s postfix/smtp[30080]: connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c07::1b]:25: Network is unreachable
Sep 10 18:37:11 kopano4s postfix/smtp[30080]: 170961E2: to=<mailtestsystem1234@gmail.com>, relay=gmail-smtp-in.l.google.com[108.177.15.26]:25, delay=0.87, delays=0.19/0.02/0.32/0.35, dsn=2.0.0, status=sent (250 2.0.0 OK 1536597431 w8-v6si15631784wrr.280 - gsmtp)
Sep 10 18:37:11 kopano4s postfix/qmgr[5376]: 170961E2: removed
Sep 10 18:42:11 kopano4s postfix/smtpd[30079]: timeout after END-OF-MESSAGE from localhost[127.0.0.1]
Sep 10 18:42:11 kopano4s postfix/smtpd[30079]: disconnect from localhost[127.0.0.1] ehlo=1 mail=1 rcpt=1 data=1 commands=4