Question on fail-over multi use

Hi there,

I'm testing the tool and all looks good. Though, I'm wondering how this would work in a multi-use or fail-over method.

Normally, an organization might have two SMTP servers. To make sure that at least one is up, one could use HaProxy or have different providers. Now, applying this to Postal and multi IPs how would you go about this?

Should each Postal be a copy or is there an option to failover automatically? I could imagine using HaProxy and then use always the same Postal server unless it's down. In this scenario, the second Postal would be a copy of the first one.

In any case, your input would help. Thank you.