Relay server doesn't send messages when Zimbra is down for failure
We have a Zimbra server and a Relay Postfix mail server.
Two weeks ago we had a file system failure on Zimbra server and we stopped it for two days to repair the file system.
Meanwhile, Postfix believes that the Zimbra server is "dead" forever and all messages for zimbra users are defintely lost!
If anyone has sent a message to a Zimbra in those two days, he receives this error message: (from Postfix relay server)
Content-Type: text/plain; charset=UTF-8
was not delivered to:
554 5.0.0 Permanent message delivery failure
How can I setup Postfix in order to not discard messages for zimbra and leave them in the queue?