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exchange 5.5 - 2003 migration - mail routing setup

Posted on 2007-08-09
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I'm a little confused at the moment. We are in the middle of an exchange 5.5 to 2003 migration. 2 exchange 5.5 servers, 1 exchange 2003 server. 1 site, all servers are on the same LAN.  Most of the mailboxes are now on the 2003 server, there are about 250 mailboxes still on the exchange 5.5 server (one of the 5.5's does not have any mailboxes) the other 1400 are on the 2003. In between now and when I move the rest of the mailboxes, and finally make the switch over to 2003 completely, how can I tell how the mail routing is setup, ie which box is sending all the mail. Also, how can I set it up to where the exchange 2003 server is the one sending all the mail. I never see any of the messages hit either of the queue's (on the 2003 or the 5.5) and I am trying to implement a spam appliance, where I will use it as a smart host, sending all messages to the appliance from exchange 2003. Let me know what info I should provide.
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Question by:ptuttle1319
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ocon827679 earned 2000 total points
ID: 19664492
The 5.5 server has an Internet Mail Connector that should be pointing to your outside world, one way or the other.  When you put E2K3 into the mix the installation created a routing group with it and the 5.5 server in the same group.  When anyone sends mail from the E2K3 side it automatically got routed over to the 5.5 server and out.

Not knowing your infrastructure I don't know how the 5.5 IMC is configured, but I would guess that there is an IP addr of your ISP's e-mail forwarder in there and your ISP is pointed to your 5.5 server.  If you want the E2K3 to send/receive you have to create an SMTP connector and point it to the smart host and on the smart host point incoming mail to the E2K3 srver. The connection to the ISP from the smart host has to be similarly changed - ISP - smart host - E2K3 server.  

Don't do anything to the 5.5 side until you confirm that this is working.  Once you know all is well take down the IMC connector on the 5.5 server.  

Personally, I wouldn't touch anything until you have your users on E2K3, do one thing at a time, as it where.  
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by:ptuttle1319
ID: 19665287
Is there some way, in the current configuration, to actually track a message, and see if it has gone out a queue? I just have the mail server pointed directly out to the internet.
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by:ocon827679
ID: 19665316
In E2K3 there is the Message Tracking tool in the administrator console.  You  can track the message until it leaves your network.  Once off the network, it on its own.  Exchange 5.5 has logs that can be used to track a message, but I have never tried using them, so I don't know the process to determine what has happened.  Articles that I saw on it a while back made it look like you would be perusing the logs to detrmine what happened to the message.  
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