Howto - Zimbra 6.0.x with GoDaddy Certificate
Bill Pitz
After installing Zimbra 6.0.3 on RHEL 5, I repeatedly received the following error when attempting to start services:
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: signature check failed)
This error can be fixed by running the following (as root):
/opt/zimbra/java/bin/keytool -import -alias root \
-keystore /opt/zimbra/java/jre/lib/security/cacerts -storepass changeit \
-file /opt/zimbra/conf/ca/commercial_ca.pem
Solution source: here