Method to test new email appliance and server

Posted on 2011-10-25
Last Modified: 2012-05-12
I have a new email security appliance and asingle Exchange 2010 VM that I want to test. I don't want any downtime, or any lost mail. What's the best to route some mail through to the new appliance and server?
I don't want to fully deploy it as part of the exchange organisation, I just want to test the mail flow.
Our existing setup is a clearswift email appliance, which scans and passes on legitimate mail to our ISA server, with port 25 open, which allows mail to the Exch2007 box, using port 25. The default receive connector (accepts * on port25) and another for port 587 are present.  
I have tested the connection to the Exch2010 Vm using telnet on port 25.
I'm thinking a receive connector is needed on Exch2010 accepting mail from the new appliance IP. Also port 25 open to the Exch2010 box on the ISA.
Any other considerations?
Should I split it onto a different port than Exch2007, or maybe accept one of our small domains on the Exch2010 receive connector. If mail comes through on port 25 on the ISA, how does it know where to go if there's two servers open on the port?
Question by:sherryfitzgroup
    1 Comment
    LVL 22

    Accepted Solution

    You would need to set up port forwarding on the ISA to push the SMTP mail to the correct server.

    So for testing purposes, you could set up a different external port (i.e. 2525) to forward to port 25 on the new server.

    Really for that matter, you shouldn't need to have your email firewall go through your security firewall to get to the Exchange server, unless you only have one external IP.

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