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Harry7

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Hi everyone,

I have a fresh installation of Kerio up and running pretty smoothly, but have one thing that puzzles me - there are several messages, about 15, stuck in the message queue with "4.4.2 Connection lost" status, or even "4.4.2 No greeting from remote host". If I try to resend they return to the queue with the same status.

The messages concerned are in fact for mailboxes that reside on the Kerio box. Senders are all external. email addresses seem to be correct, from the view I have in the Message Queue.

The config is like this: MX record points to the Kerio box (located in our DMA) that has all 3 of our domains set up (mails concerned are all sent to primary domain addresses). The domains all have the option "forward if no mailbox found" pointing to our old Exchange server that's sitting in the local network.

Any ideas as to why it would happen?
Thanks in advance!
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freakinvibe

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You should enable "SMTP Client" in the debug log, then run the queue and check which IP address it is trying to connect to. It could be that it is trying to connect to your old Exchange server and it can't for some reason.

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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Harry7

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Thanks freakinvibe!

Unfortunately, the response does not make it any clearer:
[15/Jul/2010 15:59:17][24271] {qproc} Message from <xxx@xx.org> to <yyy<_at_>yyy.org> (id=4c3c8728-000012f2) manually rejuvenated
[15/Jul/2010 15:59:18][24878] {qproc} Queue injection started, id=4c3f1436-0001f636
[15/Jul/2010 15:59:18][25193] {qproc} SEND_FWD: Started delivery of queued message id=4c3c8728-000012f2 sender=<xxx<_at_>xx.org>
[15/Jul/2010 15:59:18][25193] {qproc} SEND_FWD: Domain yyy.org is offline. Delivery delayed.
[15/Jul/2010 15:59:18][25193] {qproc} SEND_FWD: Delivery finished
[15/Jul/2010 15:59:18][24878] {qproc} Queue injection cancelled, id=4c3f1436-0001f636

I wonder what it means by saying our domain is offline? Thousands of emails pass it by being delivered to the same domain. The mailbox of the email recipient exists in both servers, old and new, and both are able (and do) to receive mail..
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TorW

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Can Kerio Connect's DNS actually resolve the various hosts and MX records? Neither xx.org nor yyy.org have an MX record, but I assume you for some reason have obfuscated them in the log snippet.
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Harry7

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Sorry for this, call me paranoid but I am usually not in favor of announcing such details to the whole wide world. Anyway, I suppose there is not much harm in it - I will still omit the mail address if you don't mind:

[15/Jul/2010 15:59:17][24271] {qproc} Message from <progress@mx3.americanprogressaction.org> to <xxx<_at_>crisisgroup.org> (id=4c3c8728-000012f2) manually rejuvenated
[15/Jul/2010 15:59:18][24878] {qproc} Queue injection started, id=4c3f1436-0001f636
[15/Jul/2010 15:59:18][25193] {qproc} SEND_FWD: Started delivery of queued message id=4c3c8728-000012f2 sender=<progress<_at_>mx3.americanprogressaction.org>
[15/Jul/2010 15:59:18][25193] {qproc} SEND_FWD: Domain crisisgroup.org is offline. Delivery delayed.
[15/Jul/2010 15:59:18][25193] {qproc} SEND_FWD: Delivery finished
[15/Jul/2010 15:59:18][24878] {qproc} Queue injection cancelled, id=4c3f1436-0001f636

The thing is - crisisgroup.org is our primary domains, and there are thousands of messages being delivered to mailboxes (including the target one here) every day. But not this email, it says the domain if offline.

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TorW

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That looks odd indeed. It almost looks like the queued mails are attempted being sent somewhere they shouldn't, or something along those lines. I'll take a look at our own queue tomorrow and see if I can figure out the mechanism. It's 2 in the morning here and I'm long out of coffee Wink
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freakinvibe

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I looked at a normal queue operations log when it tries to send to an external domain that it can't reach:

[16/Jul/2010 11:23:39][5624] {qproc} Message from <Sender@mydomain.ch> to <Recipient<_at_>sunrrise.ch> (id=4c3ef174-0000d6d8) manually rejuvenated
[16/Jul/2010 11:23:41][5432] {qproc} SEND_MX: Started delivery of queued message id=4c3ef174-0000d6d8 sender=<Sender<_at_>mydomain.ch>
[16/Jul/2010 11:23:41][5432] {qproc} SEND_MX: Delivering to remote domain sunrrise.ch...
[16/Jul/2010 11:23:41][5432] {qproc} SEND_MX: Created batch of 1 recipients for domain sunrrise.ch
[16/Jul/2010 11:23:41][5432] {smtpc} Connecting to sunrrise.ch, delivering mail from <Sender<_at_>mydomain.ch>
[16/Jul/2010 11:24:02][5432] {smtpc} Cannot connect to sunrrise.ch
[16/Jul/2010 11:24:02][5432] {qproc} SEND_MX: Result for recipient Recipient<_at_>sunrrise.ch: delayed, Status: 4.4.1 Cannot connect to remote host
[16/Jul/2010 11:24:02][5432] {qproc} SEND_MX: Batch of 1 recipients for domain sunrrise.ch processed, totally processed 0 recipients
[16/Jul/2010 11:24:02][5432] {qproc} SEND_MX: Delivery to domain sunrrise.ch finished, 0 recipients processed
[16/Jul/2010 11:24:02][5432] {qproc} SEND_MX: Delivery finished


In your case, instead of the SEND_MX, you have the SEND_FWD, that means that it tries to send the message according to the domain setup

"Forward if no mailbox found"

Can you check what you have as target host there? It should be your old exchange server. We have such a setup as well and the log should normally look like:

[16/Jul/2010 11:29:58][4584] {qproc} SEND_FWD: Started delivery of queued message id=4c402695-000124d7 sender=<m.hauer<_at_>arrowecs.at>
[16/Jul/2010 11:29:58][4584] {qproc} SEND_FWD: Created batch of 1 recipients for domain mydomain.ch
[16/Jul/2010 11:29:58][4584] {qproc} SEND_FWD: Delivering to remote domain mydomain.ch using server mail.mydomain.ch...
[16/Jul/2010 11:29:58][4584] {smtpc} Connecting to mail.mydomain.ch, delivering mail from <m.hauer<_at_>arrowecs.at>
[16/Jul/2010 11:29:58][4584] {smtpc} Connected to mail.mydomain.ch
[16/Jul/2010 11:29:58][4584] {smtpc} Received greeting: 220 mail.mydomain.ch ESMTP ready.


It seems that there is a problem with the config of your

"Forward if no mailbox found"

settings. Can you telnet on port 25 to the host indicated in the setting? Is it your Exchange Server?

Dexion AG - The Blackberry Specialists in Switzerland
https://dexionag.ch
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TorW

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For what it's worth: I came to a similar conclusion after taking a look at our own server. We have one domain with the "Forward if no mailbox found" setting.
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Harry7

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freakinvibe, TorW - thanks for your replies. The "Forward if no mailbox found" option points to our old Exchange, you are right - and it's accessible, as there are many other emails that follow the same path and are delivered to mailboxes on the old server without problems.
On the other hand, I don't see any new messages with the same kind of status - so maybe there was a moment (as I have been working on establishing a connection between the two servers) when the configuration of the "Forward".. option was wrong and that's why they are stuck. Well, I guess I will wait for them to give it up and return to sender. Or is there any way to rerout them somehow?
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