I have a t1 and a dsl line with static ip I have a firewall connected to the t1 that does all my NAT and is setup in as the network gateway.int address 10.100.10.254 my dsl router is connected in parrallel with the firewall and has a internal address of 10.100.10.200 I want to be able to send mail out through my dsl router and dont know how.
do I just change the gateway on the exchange server to
10.100.10.200 and create a 2nd mx record with higher priority pointing to the external address of the dsl router.
When they do mail pushes the internet slows down or stops so using the dsl connection out for mail would fix that problem a 2nd mx record would allow me to also recieve mail through the dsl connection when the t1 is inaccessable
To me, policy based routing seems to be the answer as well. In order to do Policy based routing, you would need to have the traffic flow through the router that will make the decision on which path to forward on. This means you will need to change the topology of your network. This is how I understand your current setup: (view in mono-spaced font)
However, the sheer fact you've asked the question leads me to believe you will need much more help on implementing the PBR than what we (the internet community) can provide here.
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