Mailbox failure due to Certificate expiry

Diagnosed By

su - zimbra -c "zmcontrol status"

This will show

mailboxd and logger failed

Also it can be checked by

zmloggerctl start

This will show the following failure

Starting logswatch...ERROR: service.FAILURE (system failure: ZimbraLdapContext) (cause: javax.net.ssl.SSLHandshakeException 
sun.security.validator.ValidatorException: PKIX path validation failed: java.security.cert.CertPathValidatorException: timestamp check failed)
zimbra logger service is not enabled!  failed.

Resolved by

Genrating the self signed certificate once again

http://wiki.zimbra.com/wiki/Ajcody-Notes-SSLCerts#Recreating_Self-Signed_SSL_Certificates