I also ran into this in my zmmtaconfig.log
Sun Nov 16 12:59:21 2008 Skipping Configuration for server
xxxxx update.
Sun Nov 16 12:59:21 2008 gs:xxxx
Sun Nov 16 12:59:21 2008 Sleeping...Key lookup failed.
where xxxx is the fqdn of my zimbra server
Also my zimbra.log file shows this :
Nov 16 13:39:03 zimbra postfix/trivial-rewrite[28545]: fatal: proxy:ldap:/opt/zimbra/conf/ldap-vad.cf(0,lock|fold_fix): table lookup problem
Nov 16 13:39:03 zimbra postfix/proxymap[28436]: error: dict_ldap_connect: Unable to set STARTTLS: -11: Connect error
Nov 16 13:39:03 zimbra postfix/proxymap[28436]: error: dict_ldap_connect: Unable to set STARTTLS: -11: Connect error
Nov 16 13:39:04 zimbra postfix/qmgr[26998]: warning: problem talking to service rewrite: Success
Nov 16 13:39:04 zimbra postfix/master[26997]: warning: process /opt/zimbra/postfix/libexec/trivial-rewrite pid 28544 exit status 1
Nov 16 13:39:04 zimbra postfix/master[26997]: warning: /opt/zimbra/postfix/libexec/trivial-rewrite: bad command startup -- throttling
Nov 16 13:39:04 zimbra postfix/master[26997]: warning: process /opt/zimbra/postfix/libexec/trivial-rewrite pid 28545 exit status 1
Nov 16 13:39:04 zimbra postfix/smtpd[28535]: warning: problem talking to service rewrite: Connection reset by peer
I have tried to solve this using :
Problem with Certificate can cause MTA Failure - Zimbra :: Wiki
But the above errors remain