I have been using the open source version of Zimbra for a while and it has worked well. Yesterday our server, hosted on a cloud, crashed and the root partition (FC8) would not boot. I could not get to the console to attempt to use an alternate superblock, so I created a new instance, attached the Zimbra partition, and proceeded to install all of the dependencies.
After a stressful morning, I have Zimbra running (startup.log has no errors) and people can log into the web interface, POP3, and IMAP. According to the logs, we appear to be receiving and sending email just fine.
So, the problem is that no new emails are being received into mailboxes and no email is getting sent (although it is accepted by the server). I have checked every log file I can think of and there are no errors that I can find. The daemons are running fine also.
Does anyone have any idea what to do with this?