Exchange 2010 Outbound Mail - 2 ISP's

Posted on 2012-08-29
Last Modified: 2012-08-29
I recently added another broadband link for failover on a network that has an Exchange 2010 server.

Since the router is configured for failover and loadbalancing, the Exchange server will sometime try to send mail out over the new connection, when it should only be using the old one.

Is there a setting in Exchange Management Console that will allow me to apply this setting, or does this need to be done from the router itself?

Thanks in advance!
Question by:LouisvilleGeek
    LVL 63

    Accepted Solution

    This is a routing issue, not an Exchange issue.
    If you want to use two ISPs, then you should use a dual WAN router that manages the connection for you. Then just one default gateway in the server configuration.
    However that will not always gurantee you mail delivery. That is because remote sites will look at the PTR and the SMTP banner from Exchange. They cannot match on both connections because of the link to the IP addresses. If you are using a smart host this isn't a problem, so that is what I usually suggest is done. The two WAN connections are just for getting email to the smart host.


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