After installing Patch 10 on my Zimbra 8.6 OSE, my mail server stopped receiving external mail. Only internal mail from domains configured in Zimbra are working.
Checking zimbra.log, I found many lines as below:
Code: Select all
NOQUEUE: reject: RCPT from mega1.domain.net.br[xx.xx.xx.xx]: 451 4.3.5 <mega1.domain.net.br[xx.xx.xx.xx]>: Client host rejected: Server configuration error; from=<return@domain.net.brr> to=<mail@mydomain.com> proto=ESMTP helo=<mega1.domain.net.br>