Self-generated admin e-mail going nowhere

[mhammett]

I have a 6 server cluster. Two LDAP, two MTA, two mailstores. A couple weeks ago I started noticing a trend of admin@[each MTA's FQDN] sending a few hundred messages as shown by the daily mail report. I realized this morning that they weren't showing up in any of the mailboxes. I decided to check the log. It looks like each server sends a message to itself. It bounces, then disappears. What's generating what kind of e-mails and where are they supposed to be going?

Code: Select all

root@Zimbra8-Mailstore1:/home/mhammett# grep -rnw /var/log/zimbra.log -e '3C2CD861D0'
262399:Apr 16 05:56:09 Zimbra8-MTA1 postfix/amavisd/smtpd[19210]: 3C2CD861D0: client=localhost.localdomain[127.0.0.1]
262400:Apr 16 05:56:09 Zimbra8-MTA1 postfix/cleanup[19204]: 3C2CD861D0: message-id=<20190416105608.88161861D1@zimbra8-mta1.ics-il.net>
262401:Apr 16 05:56:09 Zimbra8-MTA1 postfix/qmgr[3644]: 3C2CD861D0: from=<admin@zimbra8-mta1.ics-il.net>, size=1174, nrcpt=1 (queue active)
262403:Apr 16 05:56:09 Zimbra8-MTA1 amavis[18691]: (18691-05) 7NqzGP5qdkL9 FWD from <admin@zimbra8-mta1.ics-il.net> -> <admin@zimbra8-mta1.ics-il.net>, BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 3C2CD861D0
262404:Apr 16 05:56:09 Zimbra8-MTA1 amavis[18691]: (18691-05) Passed CLEAN {RelayedInbound}, <admin@zimbra8-mta1.ics-il.net> -> <admin@zimbra8-mta1.ics-il.net>, Message-ID: <20190416105608.88161861D1@zimbra8-mta1.ics-il.net>, mail_id: 7NqzGP5qdkL9, Hits: -1.901, size: 481, queued_as: 3C2CD861D0, 656 ms
262405:Apr 16 05:56:09 Zimbra8-MTA1 postfix/smtp[19207]: 88161861D1: to=<admin@zimbra8-mta1.ics-il.net>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.8, delays=0.11/0.03/0.01/0.65, 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 3C2CD861D0)
262407:Apr 16 05:56:09 Zimbra8-MTA1 postfix/smtp[19211]: 3C2CD861D0: to=<admin@zimbra8-mta1.ics-il.net>, relay=none, delay=0.07, delays=0.04/0.03/0/0, dsn=5.4.6, status=bounced (mail for zimbra8-mta1.ics-il.net loops back to myself)
262409:Apr 16 05:56:09 Zimbra8-MTA1 postfix/bounce[19212]: 3C2CD861D0: sender non-delivery notification: 5BD6587A85
262411:Apr 16 05:56:09 Zimbra8-MTA1 postfix/qmgr[3644]: 3C2CD861D0: removed

[DualBoot]

Hello,

this is related to the localconfig settings :
smtp_destination
use zmlocalconfig smtp_destination to see the value.
Regards,

[mhammett]

I didn't get a chance to look at the setting DualBoot provided, but I recently upgraded from 8.6 to 8.8.12 and something during the upgrade process fixed it... and promptly flooded my normal admin mailbox. It was disk full warnings for my two MTA servers. Logs had built up over three years and were starting to fill the disk.