Here's the scenario.
1 x SBS 2011 Exchange Server
1 x Untangle Firewall/Load Balancer/Internet Fail over
2 x ADSL Connections with Static IP
The SBS server sits behind the Untangle Server which has both ADSL Connections connected to it.
Originally we had the Server using our ISP's outbound mail servers as a smart host to relay mail out. However once the connection failed over/ or load balanced over to the alternate connection which is from another provider the smart host rejects the email as its coming from outside their network.
So then we reverted to sending mail out directly from the Server - however my fear has come through and it appears we have been black listed by a number of people.
How do people handle this kind of fail over/load balancing solution?
Could i set the default gateway on the server to the primary connections router and use the smart filter?
It wouldn't be hard to reconfigure the server to the alternate connection if we have issues with the primary connection. Just updating the smart filter...