I'm using 8.8.15_GA_3869.RHEL7_64 Network edition + Zextras on CentOS7 in a single node installation.
In my daily dmarc report from Amazon SES there is always exactly 1 failed email.
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<source_ip>REDACTED</source_ip>
<count>1</count>
<policy_evaluated>
<disposition>reject</disposition>
<dkim>fail</dkim>
<spf>fail</spf>
</policy_evaluated>
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[root@mail ~]# zgrep "inbound.*amazon" /var/log/zimbra.log*
/var/log/zimbra.log-20230120.gz:Jan 20 04:08:24 mail postfix/smtp[361]: 5BC07C1B6A: to=<license@updates.zextras.com>, relay=inbound-smtp.eu-west-1.amazonaws.com[54.239.39.100]:25, delay=0.89, delays=0.01/0.02/0.63/0.23, dsn=2.0.0, status=sent (250 OK mdkhod0siqdb8vmtmu57f7oj6vb6ube0p1if9ig1)
/var/log/zimbra.log-20230122.gz:Jan 22 04:08:25 mail postfix/smtp[394]: B17F58849D: to=<license@updates.zextras.com>, relay=inbound-smtp.eu-west-1.amazonaws.com[176.32.109.132]:25, delay=0.87, delays=0.01/0.03/0.58/0.25, dsn=2.0.0, status=sent (250 OK thinlf7s53254pnaifjubaqd8ahhkgnr7llvnh81)
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:44 mail postfix/smtp[365]: 708DDB682B: to=<license@updates.zextras.com>, relay=inbound-smtp.eu-west-1.amazonaws.com[52.95.121.182]:25, delay=2, delays=0.01/0.02/1.7/0.23, dsn=2.0.0, status=sent (250 OK h5743hmur2o9l64dor9vld82ci2jorptard4kt01)
Here are the detailed logs for the last attempt:
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[root@mail ~]# zgrep "708DDB682B" /var/log/zimbra.log*
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:42 mail postfix/amavisd/smtpd[364]: 708DDB682B: client=localhost[127.0.0.1]
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:42 mail postfix/cleanup[358]: 708DDB682B: message-id=<1664801225.0.1674443321378.JavaMail.zimbra@mail>
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:42 mail postfix/qmgr[10452]: 708DDB682B: from=<>, size=3102, nrcpt=1 (queue active)
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:42 mail amavis[9315]: (09315-02) OtKJVHtNN4Az FWD from <> -> <license@updates.zextras.com>, BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 708DDB682B
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:42 mail amavis[9315]: (09315-02) Passed CLEAN {RelayedOutbound}, ORIGINATING_POST/MYNETS LOCAL [127.0.0.1]:54384 <> -> <license@updates.zextras.com>, Queue-ID: B6BD8BBB3F, Message-ID: <1664801225.0.1674443321378.JavaMail.zimbra@mail>, mail_id: OtKJVHtNN4Az, Hits: -2.899, size: 2703, queued_as: 708DDB682B, 653 ms
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:42 mail postfix/smtp[359]: B6BD8BBB3F: to=<license@updates.zextras.com>, relay=127.0.0.1[127.0.0.1]:10032, delay=0.73, delays=0.05/0.02/0.01/0.64, 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 708DDB682B)
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:44 mail postfix/smtp[365]: 708DDB682B: to=<license@updates.zextras.com>, relay=inbound-smtp.eu-west-1.amazonaws.com[52.95.121.182]:25, delay=2, delays=0.01/0.02/1.7/0.23, dsn=2.0.0, status=sent (250 OK h5743hmur2o9l64dor9vld82ci2jorptard4kt01)
/var/log/zimbra.log-20230123.gz:Jan 23 04:08:44 mail postfix/qmgr[10452]: 708DDB682B: removed
What is your opinion? Should I open a support case for this? Or did I miss some settings in Zimbra?
I'm trying not to worry about the fact that my mail server is sending emails without my consent (or maybe I agreed to it... tbh I can't recall).
But why does it leave empty the from<> field? Have you seen anything similar before?
Many thanks!