I did a zmsshkeygen rsa and I still get errors when trying to use the manage mail queues menu. I made sure the perms were correct:
zimbra@chamber:~/.ssh$ ls -la
total 28
drwx------ 2 zimbra zimbra 4096 Oct 3 14:01 .
drwxr-xr-x 39 root root 4096 Sep 27 00:33 ..
-rw------- 1 zimbra zimbra 237 Oct 3 14:01 authorized_keys
-rw------- 1 zimbra zimbra 237 Oct 3 14:01 identity
-rw-r--r-- 1 zimbra zimbra 391 Oct 3 14:01 known_hosts
-rwx------ 1 zimbra zimbra 883 Oct 3 13:57 zimbra_identity
-rwx------ 1 zimbra zimbra 237 Oct 3 13:57 zimbra_identity.pub
One thing I did that wasn't mentioned was to add the zimbra_identiy.pub to identity and authorized_keys.... zmsshkeygen rsa did not do that for me... I'm not sure how this is supposed to work so... if someone could explain how the keys get loaded into memory or the passphrase is entered when the Mail Queues are used... would be helpful
Message: system failure: exception during auth {RemoteManager: mail.defensiblenetworks.com->zimbra@mail.defensiblenetworks.com:22}
com.zimbra.cs.service.ServiceException: system failure: exception during auth {RemoteManager: mail.defensiblenetworks.com->zimbra@mail.defensiblenetworks.com:22}
at com.zimbra.cs.service.ServiceException.FAILURE(Ser viceException.java:174)
at com.zimbra.cs.rmgmt.RemoteManager.getSession(Remot eManager.java:195)
at com.zimbra.cs.rmgmt.RemoteManager.execute(RemoteMa nager.java:132)
at com.zimbra.cs.service.admin.GetMailQueueInfo.handl e(GetMailQueueInfo.java:56)
at com.zimbra.soap.SoapEngine.dispatchRequest(SoapEng ine.java:261)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:162)
at com.zimbra.soap.SoapEngine.dispatch(SoapEngine.jav a:84)
at com.zimbra.soap.SoapServlet.doPost(SoapServlet.jav a:223)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:709)
at com.zimbra.cs.servlet.ZimbraServlet.service(Zimbra Servlet.java:173)
at javax.servlet.http.HttpServlet.service(HttpServlet .java:802)
at org.apache.catalina.core.ApplicationFilterChain.in ternalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.do Filter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invo ke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invo ke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke( StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invok e(StandardEngineValve.java:107)
at org.apache.catalina.valves.AccessLogValve.invoke(A ccessLogValve.java:541)
at org.apache.catalina.connector.CoyoteAdapter.servic e(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(H ttp11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11 ConnectionHandler.processConnection(Http11BaseProt ocol.java:667)
at org.apache.tomcat.util.net.PoolTcpEndpoint.process Socket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThr ead.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlR unnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.IOException: Publickey authentication failed.
at ch.ethz.ssh2.auth.AuthenticationManager.authentica tePublicKey(AuthenticationManager.java:259)
at ch.ethz.ssh2.Connection.authenticateWithPublicKey( Connection.java:371)
at ch.ethz.ssh2.Connection.authenticateWithPublicKey( Connection.java:422)
at com.zimbra.cs.rmgmt.RemoteManager.getSession(Remot eManager.java:187)
... 24 more
Caused by: java.io.IOException: The connection is closed.
at ch.ethz.ssh2.auth.AuthenticationManager.deQueue(Au thenticationManager.java:77)
at ch.ethz.ssh2.auth.AuthenticationManager.getNextMes sage(AuthenticationManager.java:99)
at ch.ethz.ssh2.auth.AuthenticationManager.authentica tePublicKey(AuthenticationManager.java:234)
... 27 more
Caused by: java.io.IOException: Cannot read full block, EOF reached.
at ch.ethz.ssh2.crypto.cipher.CipherInputStream.getBl ock(CipherInputStream.java:81)
at ch.ethz.ssh2.crypto.cipher.CipherInputStream.read( CipherInputStream.java:108)
at ch.ethz.ssh2.transport.TransportConnection.receive Message(TransportConnection.java:231)
at ch.ethz.ssh2.transport.TransportManager.receiveLoo p(TransportManager.java:520)
at ch.ethz.ssh2.transport.TransportManager$1.run(Tran sportManager.java:315)
... 1 more
Error code: service.FAILURE
Method: ZmCsfeCommand.prototype.invoke
Details:soap:Receiver
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Manage Mail Queues Error 
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