Users in one of the domains we host on Zimbra 4.5.6 is saying that they are seeing delays in delivery of mail to certain mailboxes. To the end user it looks as though mail is being delivered hours after it was sent, including mail sent from other users in the domain through the same Zimbra server. I suspect the problem is with the Outlook Connector (all users in this domain are using the connector), so I'll post a thread there, too. I suspect this because I check the maillog file and see that it looks like Zimbra is delivering mail, and the message header in the delivered message shows no delivery delay (that is, it shows receiving the mail at 10:28:01 and delivery at 10:28:02, for example).

Appended below are the lines from the /var/log/zimbra.log file. Can someone tell me whether I'm right in understanding that these lines indicate timely delivery of the item from the user user1@mycustomer.com? A related question is: What does the value of "delay" in the zimbra.log and /var/log/maillog indicate?

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Sep 9 10:28:50 zimbra postfix/smtpd[1039]: 85F62A2C001: client=myserver.mydomain.com[209.23.116.230]
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra last message repeated 4 times
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra last message repeated 2 times
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:50 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:50 zimbra postfix/cleanup[1042]: 85F62A2C001: message-id=<6367284.81771189348130537.JavaMail.root@myserv er.mydomain.com>2C0012C001
Sep 9 10:28:50 zimbra postfix/qmgr[27731]: 85F62A2C001: from=<user1@mycustomer.com>, size=4276, nrcpt=4 (queue active)
Sep 9 10:28:50 zimbra postfix/smtpd[1039]: disconnect from myserver.mydomain.com[209.23.116.230]
Sep 9 10:28:50 zimbra postfix/pickup[11386]: ABE97A2C002: uid=100 from=<user1@mycustomer.com>
Sep 9 10:28:50 zimbra postfix/cleanup[1042]: ABE97A2C002: message-id=<6367284.81771189348130537.JavaMail.root@myserv er.mydomain.com>
Sep 9 10:28:50 zimbra postfix/pipe[1043]: 85F62A2C001: to=<user2@mycustomer.com>, relay=dfilt, delay=0, status=sent (myserver.mydomain.com)
Sep 9 10:28:50 zimbra postfix/pipe[1043]: 85F62A2C001: to=<user3@mycustomer.com>, relay=dfilt, delay=0, status=sent (myserver.mydomain.com)
Sep 9 10:28:50 zimbra postfix/pipe[1043]: 85F62A2C001: to=<user4@mycustomer.com>, relay=dfilt, delay=0, status=sent (myserver.mydomain.com)
Sep 9 10:28:50 zimbra postfix/pipe[1043]: 85F62A2C001: to=<user5@mycustomer.com>, relay=dfilt, delay=0, status=sent (myserver.mydomain.com)
Sep 9 10:28:50 zimbra postfix/qmgr[27731]: 85F62A2C001: removed
Sep 9 10:28:50 zimbra postfix/qmgr[27731]: ABE97A2C002: from=<user1@mycustomer.com>, size=6145, nrcpt=4 (queue active)
Sep 9 10:28:50 zimbra last message repeated 15 times
Sep 9 10:28:50 zimbra slapd[2779]: is_entry_objectclass("", "2.5.6.1") no objectClass attribute
Sep 9 10:28:50 zimbra last message repeated 3 times
Sep 9 10:28:50 zimbra amavis[21000]: (21000-03) ESMTP::10024 /opt/zimbra/amavisd/tmp/amavis-20070909T100752-21000: <user1@mycustomer.com> -> <user2@mycustomer.com>,<user3@mycustomer.com>,<use r4@mycustomer.com>,<user5@mycustomer.com> SIZE=6145 Received: from myserver.mydomain.com ([127.0.0.1]) by localhost (myserver.mydomain.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP; Sun, 9 Sep 2007 10:28:50 -0400 (EDT)
Sep 9 10:28:50 zimbra amavis[21000]: (21000-03) Checking: licO-hvfN1DN <user1@mycustomer.com> -> <user2@mycustomer.com>,<user3@mycustomer.com>,<use r4@mycustomer.com>,<user5@mycustomer.com>
Sep 9 10:28:53 zimbra slapd[2779]: is_entry_objectclass("", "2.5.6.1") no objectClass attribute
Sep 9 10:28:53 zimbra postfix/smtpd[1060]: connect from localhost.localdomain[127.0.0.1]
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra postfix/smtpd[1060]: 96BE1A2C001: client=localhost.localdomain[127.0.0.1]
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra postfix/cleanup[1042]: 96BE1A2C001: message-id=<6367284.81771189348130537.JavaMail.root@myserv er.mydomain.com>
Sep 9 10:28:53 zimbra postfix/qmgr[27731]: 96BE1A2C001: from=<user1@mycustomer.com>, size=6719, nrcpt=4 (queue active)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra postfix/smtpd[1060]: disconnect from localhost.localdomain[127.0.0.1]
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra amavis[21000]: (21000-03) FWD via SMTP: <user1@mycustomer.com> -> <user2@mycustomer.com>,<user3@mycustomer.com>,<use r4@mycustomer.com>,<user5@mycustomer.com>, BODY=8BITMIME 250 2.6.0 Ok, id=21000-03, from MTA([127.0.0.1]:10025): 250 Ok: queued as 96BE1A2C001
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra amavis[21000]: (21000-03) Passed CLEAN, [209.23.116.230] <user1@mycustomer.com> -> <user2@mycustomer.com>,<user3@mycustomer.com>,<use r4@mycustomer.com>,<user5@mycustomer.com>, Message-ID: <6367284.81771189348130537.JavaMail.root@myserver. mydomain.com>, mail_id: licO-hvfN1DN, Hits: -3.827, queued_as: 96BE1A2C001, 2950 ms
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraDomainType) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: <= bdb_equality_candidates: (zimbraMailStatus) index_param failed (18)
Sep 9 10:28:53 zimbra slapd[2779]: is_entry_objectclass("", "2.5.6.1") no objectClass attribute
Sep 9 10:28:53 zimbra postfix/smtp[1054]: ABE97A2C002: to=<user2@mycustomer.com>, relay=127.0.0.1[127.0.0.1], delay=3, status=sent (250 2.6.0 Ok, id=21000-03, from MTA([127.0.0.1]:10025): 250 Ok: queued as 96BE1A2C001)
Sep 9 10:28:53 zimbra postfix/smtp[1054]: ABE97A2C002: to=<user3@mycustomer.com>, relay=127.0.0.1[127.0.0.1], delay=3, status=sent (250 2.6.0 Ok, id=21000-03, from MTA([127.0.0.1]:10025): 250 Ok: queued as 96BE1A2C001)
Sep 9 10:28:53 zimbra postfix/smtp[1054]: ABE97A2C002: to=<user4@mycustomer.com>, relay=127.0.0.1[127.0.0.1], delay=3, status=sent (250 2.6.0 Ok, id=21000-03, from MTA([127.0.0.1]:10025): 250 Ok: queued as 96BE1A2C001)
Sep 9 10:28:53 zimbra postfix/smtp[1054]: ABE97A2C002: to=<user5@mycustomer.com>, relay=127.0.0.1[127.0.0.1], delay=3, status=sent (250 2.6.0 Ok, id=21000-03, from MTA([127.0.0.1]:10025): 250 Ok: queued as 96BE1A2C001)
Sep 9 10:28:53 zimbra postfix/qmgr[27731]: ABE97A2C002: removed
Sep 9 10:28:55 zimbra postfix/lmtp[1061]: 96BE1A2C001: to=<user2@mycustomer.com>, relay=myserver.mydomain.com[209.23.116.230], delay=2, status=sent (250 2.1.5 OK)
Sep 9 10:28:55 zimbra postfix/lmtp[1061]: 96BE1A2C001: to=<user3@mycustomer.com>, relay=myserver.mydomain.com[209.23.116.230], delay=2, status=sent (250 2.1.5 OK)
Sep 9 10:28:55 zimbra postfix/lmtp[1061]: 96BE1A2C001: to=<user4@mycustomer.com>, relay=myserver.mydomain.com[209.23.116.230], delay=2, status=sent (250 2.1.5 OK)
Sep 9 10:28:55 zimbra postfix/lmtp[1061]: 96BE1A2C001: to=<user5@mycustomer.com>, relay=myserver.mydomain.com[209.23.116.230], delay=2, status=sent (250 2.1.5 OK)
Sep 9 10:28:55 zimbra postfix/qmgr[27731]: 96BE1A2C001: removed