I am curious as to how it is possible to create an MX backup using zimbra community edition. Is there a wiki for this? I would need features like tcp ping that knows when the primary mail server is online again ready to accept mail. Also best practices to prevent backscatter. Also if I was creating MX backup for zimbra is there a way that I could just use RSYNC scripts to run and essentially have a hot backup server. As well as best practice for MX backup for such email platforms like exchange.
Any input is appreciated.