All right Guys I have 2 Windows 2k3 Boxes Both of them are running Domino 6.5.5 FP1. What I am trying to achive is a failover/load balancing for our internal Domino Servers and SMTP Out and SMTP IN.
Had the same thought but if the MX records have the same priority, which mail server will take precedence? I would think your main mail server would have priority 10 and the failover server have a priority of 20 - post what you end up with - curious about a solution for this as well.
Best way to do this is to add a load balancer and point inbound or outbound mail to the load balancer. The Load balancer can distribute mail traffice between the two domino servers.