I'm installing Zimbra for the first time, as well as I'm a total Linux noob too! (I'm putting a test server together for possible future migration COMPLETELY out of the Microsoft world- I'm currently MS everything, including Exchange.)
I've tried Ubuntu server, Debian and openSUSE, but I settled on CentOS 5 for the Zimbra install.
Though the actual install completed, when I go into the admin console for Zimbra, the MTA isn't started. Here are the pertinent errors from the install log:
No results returned for A lookup of mail01.example.com
DNS ERROR resolving mail01.example.com
It is suggested that the hostname be resolveable via DNS
checking isEnabled zimbra-mta
zimbra-mta is enabled
DNS ERROR - none of the MX records for mail01.example.com
resolve to this host
Additionally, there was a port conflict regarding MTA on port 25 in the install as well.
Any help for how to fix this is appreciated!