I've just installed Zimbra on Debian 4.0 and have a problem getting postfix running. I've looked at the various threads and taken care of competing MTAs. Exim 4 was running, but is now deinstalled.

zmcontrol gives me

mta Stopped
postfix is not running
saslauthd is running with pid 12551
snmp Running

The zimbra log shows:

Oct 21 13:53:53 localhost postfix/postfix-script[12523]: warning: not owned by root: /opt/zimbra/postfix-
Oct 21 13:53:53 localhost postfix/postfix-script[12537]: starting the Postfix mail system
Oct 21 13:54:30 localhost postfix/postqueue[12976]: fatal: Queue report unavailable - mail system is down

sh -x bin/zmmtactl status indicates that it is indeed postfix that is failing.

If I try connecting to port 25 I get connection refused.

Any thoughts, as far as I can tell /etc/hosts and DNS is configured correctly