I have installed Zimbra on Linux server (CentOS 5).
If zimbra starts - all services of zimbra starts sucessfully, even mta. I can send emails form zimbra to external addresses but I can't receive it reply emails. But this is another problem. Problem that I want to resolve is impossibility of sending emails from command line of Linux, so no cron job's email cannot be recieved. If I stoped mta (postfix) in zimbra, and starts linux postfix I can send emails form command line and from zimbra too, but in /var/log/maiilog I have too much messages like:
Jun 23 13:54:00 localhost postfix/postqueue: fatal: Queue report unavailable - mail system is down...
How it can be solved?