Hi there. Trying to install a new SSL on Zimbra 4.5.6 (we need an upgrade, I know). I create a my.crt file in /opt/zimbra/ssl/ssl/ and paste the SSL I got from GeoTrust into the file.

When I try doing the following command as root:
keytool -import -alias tomcat -keystore /opt/zimbra/ssl/ssl/commercial.keystore -trustcacerts -file my.crt -storepass zimbra
I get keytool error: java.lang.Exception: Failed to establish chain from reply. Same result if I try doing it as user zimbra.

Am I doing something wrong? Thanks in advance.