I am new to Ubuntu (although understand the principles of command lines and changing accounts).

Installed Zimbra 8 (on 2 difference machines), however have an error:

Admin Console, log in as the admin account (as set up in the install) go to:

Monitor > Mail Queues

I get the enclosed error.

I notice the postfix and zimbra accounts installed in Ubuntu after the install where disabled, they might also have a password set now (after i played around with them).

Ideas please on how to debug this problem... I will add the services all have green ticks next to them.