Here's my simple backup plan
I setup a cron job on every midnight...
So once the primary is down I can switch the smtp and pop to backup and have all the setup in backup server.
service zimbra stop
ssh email@example.com service zimbra stop
rsync --delete -avh --progress -e ssh /opt/zimbra firstname.lastname@example.org:/opt/zimbra > rsynclog
service zimbra start
ssh email@example.com service zimbra start
Will this work? and what are the things additionally I need to do?