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I'm looking at making an IP/routing change to a remote ESA, and then powering it down for a remote tech to unrack. Obviously, as soon as I commit the changes to the routing tables, I'm going to lose connectivity to the appliance. Is there a way to ei...
For inbound mail, MX preference is fine for most purposes. For outbound mail, you can either take the same approach (smarthost preference) if your groupware supports it, or use a third party load balancer to provide a VIP.
