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System e-mail messages stuck in mail queue

Hello,

We have three Exchange 2003 SP2 servers in our organization, one front-end, two back-end. We took the second back end server offline some time ago with plans to use it again in the future. While the second back end server has been offline, I've noticed that several messages a day will be stuck in one of the mail queues, it's a system message of some kind. Anyway, the message is addressed to all of the Exchange servers. At first I was alarmed, but it didn't impact anything, mail flow was fine. My assumption is that since the message was addressed to the offline Exchange server, it would just sit there and expire, which it does. I'd say there will be a dozen or so a week, but they expire.

So, can anyone tell me what these messages are and is there any importance to them?
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lucado01
Asked:
lucado01
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1 Solution
 
redseatechnologiesCommented:
Exchange servers communicate with each other via email (which makes sense really).  Those messages are probably public folder replication messages - you can open up public folders and remove the replicas that reference the offline server, and they will likely dry up.

Additionally, open the queue and have a look at the message - you can usually tell what it is by the address it is sending to.

-red
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lucado01Author Commented:
I'll check this in the morning, thanks Red.
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nitadminCommented:
Hi lucado01,

Hi were your two backend exchange servers in cluster group. If it was part of active/passive cluster group. then you will have problems should your current active server fail.
What I would do is to bring it back up so that it can it will be available if your active back end exchange server fails.

Regards,

nitadmin
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redseatechnologiesCommented:
If it was part of a cluster, why would the other node have a queue open to it?
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lucado01Author Commented:
Thanks guys.

Nitadmin, we're not using a cluster. Red, the messages are in the "Messages with unreachable destination queue". I'm guessing that's an accessible queue through Explorer but I don't know where the folder lives.

When I do open a message, the From address includes the online servers name followed by a -IS. I'm guessing the IS stands for Information store? The recipients are the other Exchange servers, the subject line is hidden. I'm inclined to think the its Public Folder replication messages as you said but wanted to make sure if I could.

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redseatechnologiesCommented:
They sure sound like PF replication messages.

The quickest way I can think of confirming this is either by using PFDavAdmin to export the public folder replicas - or bringing the other server online and then looking at the public folder instances on it.

I expect that you have not removed all the system folders.

Unfortunately, I can't think of a better way to confirm it.

-red
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