Based on the error messages that I've been having, it appears that my Zimbra Open Source email server is having problems with expired certificates.

Here are the URLs of the things I've tried:
http://www.zimbra.com/forums/adminis...es-ldap-2.html
Administration Console and CLI Certificate Tools - Zimbra :: Wiki (multi-node)
http://www.zimbra.com/forums/adminis...e-expired.html
http://www.zimbra.com/forums/adminis...e-expired.html

After creating new certificates on the LDAP server, I copied them to the Mailbox and MTA servers. That hasn't help either.

Needless to say, right now my email system is so messed up, it's not starting up.

Log files:
LDAP:
zmmtaconfig.log:
Sun Mar 6 10:05:24 2011 Watchdog: skipping service antivirus. Service not yet available for restarts.

Mailbox:
$ zmcontrol start
Host mailbox1.vpn
Unable to determine enabled services from ldap.
Unable to determine enabled services. Cache is out of date or doesn't exist.

zmmtaconfig.log:
Sun Mar 6 10:08:45 2011 Skipping All Reverse Proxy URLs update.
Sun Mar 6 10:08:45 2011 Skipping getAllReverseProxyURLs ERROR: service.FAILURE (system failure: ZimbraLdapContext) (cause: javax.net.ssl.SSLHandshakeException sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: signature check failed)

MTA:
zmmtaconfig.log:
Sun Mar 6 10:11:22 2011 Skipping Global system configuration update.
Sun Mar 6 10:11:22 2011 gacf ERROR: service.FAILURE (system failure: ZimbraLdapContext) (cause: javax.net.ssl.SSLHandshakeException sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: signature check failed)

OS & Zimbra versions:
Release 6.0.5_GA_2213.DEBIAN5 DEBIAN5 FOSS edition.
Linux mailbox1 2.6.26-2-686 #1 SMP Wed Feb 10 08:59:21 UTC 2010 i686 GNU/Linux

I *really* need to help getting this mail system running again!

If there is anything else I forgot to include, please let me know and I'll do my best to get it to you.

Thank You very much for your help!

Harlan...