I have a cluster server with ISPConfig 3 with 2 web servers and 1 mailserver. i wondering, if i want to add later a new mail server is that possible? All my accounts and mails will be transfered to second mail server automatically or i must doing manualy. i sincro my servers with unison and work's fine. Mailserver is slave server, and i want to add a new mailserver for load balancing and HA. And the second name of mailserver, must be different from first, or the same? Can i set mailserver service and dns service on the same slave server? Thank's a lot!