Message: system failure: exception during auth {RemoteManager: mx1.mail-svr.com->zimbra@mx1.mail-svr.com:22} Error code: service.FAILURE Method: [unknown] Details:soap:Receiver
Just curious. It looks like this is an error with zimbra connecting on port 22 to the server. This makes me think that for some reason Zimbra is trying to connect ssh on port 22 but I have changed ssh to run on a custom port number. Is this what is causing this error?

If so, how can I configure Zimbra to use my custom port?