We currently have two isp providers and have a sonicwall 3060 with failover setup. We also host our website at dreamhost.com and forward the mx record to an internal email server. I would like to setup failover mx record. What I mean is when the primary isp goes down, it would then send it to the secondary isp mx record. I asked dreamhost.com and they said they cannot do have the capability to do that.
How could I get this accomplished? Any advice would be greatful.