Hello, I'm wondering how to do a proper mail server failover.
Let's say smtp1 is down, the internet client resolves the other mx with a lower priority and the mail goes to smtp2. Now smtp2 writes the message on the disk in order to store it. What do you people do in order to have a common storage for both smtp which can be correct regardless whether a smtp goes up or down. How do you manage the failover ? Thank you