I have requirements for mission critical e-mail, that would require a minimum of two mail servers in a cluster.
Has anyone done this with Interworx? The way I see doing this is having 2x Barracuda spam firewalls in two locations and pointing DNS to that and then if the server fails we can get it send to a new IP of the server that has stepped in for that client.
However would like something automatic.
Could we rsync every 5 mins or so, the SMTP config and data over to a backup server which could serve as our backup and put that server in as the secondary MX priority?
How is everyone else doing it?
Your answers are much appreciated.