We are using a zimbra community edition server on cloud, version 8.0.6.GA.5922.UBUNTU12.64 UBUNTU12_64 FOSS edition.
It was working fine until yesterday. This morning incoming mails suddenly stop delivering to mailboxes, outgoing mails are working just fine.
I've looked into the administration console, it seems all inbound e-mails are being held on the deferred queue with no exception. I've made no modifications to the system whatsoever.
I've also looked at the logs but really don't know where to start looking, or even what to look for.
Could you guys help me about this?