My network contains 1 SBS 2011 server that has Exchange 2010, a Cisco ASA 5505 firewall, and a Comcast and AT&T modem (for ISP redundancy). I have configured the ASA, so that when the 1st ISP goes down the ASA fails over to the 2nd ISP and the users can get to the Internet.
I have my MX record pointing to a Spam filter that then forwards the email onto our Exchange server. I have set up the 2nd ISP IP address for Exchange in the spam filter. When we are on the 2nd ISP we can get incoming email, but outbound email stays in the queues in Exchange.
Is there something that I need to do in Exchange 2010 to allow traffic to go out through the 2nd ISP? Is creating a 2nd MX record a possible solution? If so, can it also point to my spam filter or does it have to point directly to the Exchange server?
Thanks for any help that can be provided.