I'm running Zimbra 8.0.2_GA_5569.FOSS (yes, I know, I need to update) and am running into a problem I'm not sure how to troubleshoot. Messages get deferred with the following reason:
In all cases, the origin domain is similar to:
Reason: host 127.0.0.1[127.0.0.1] said: 451 4.3.5 id=04724-04 - temporary mta failure on relaying, from mta(smtp:[127.0.0.1]:10025): 451 4.3.5 server configuration problem (in reply to end of data command)
Also, sending messages using an external client (like Apple Mail) take a good 60 seconds or so to send, and in some cases fail all-together. For example, when a message fails to send in Apple Mail, the client reports that the server response was "Server configuration problem."
I've done some Googling around and read that it could be that the number of amavis instances and the number of postfix instances are not equal. Could that be the case? If so, how do I adjust one or both? Could the problem be something else? Any pointers/suggestions/help would be extremely appreciated.