I have 2 queries regarding the MTA configured on a Cluster running in HA mode:
1) What will happen to the Mails queued for processing in one member if there is a fail-over to the other member in the cluster? Is this queue will also be synced between the cluster members? If not then how to make sure the mails been delivered to the end-user?
2) How to address the scenario, when we face a hardware issue on the Active member in the cluster which is processing the mails? how to take out the mails which are in the queue?