I have the same problem. I can send emails with apparent success, except that I only receive email delivered outside of the zimbra domain. That is, email sent to
david@myotheremaildomain.com gets delivered, but email sent to
david@myzimbra.com does not when sent from within zimbra.
I can see the messages in the /opt/zimbra/store directory, but I can't find any error message in the log.
- david