I tried to connect to http://correo.intepla.com as indicated in the soap request (at the end of you post). Et voilà : you have an apache server listening on port 80, port 443 is redirected to your Zimbra. You should change this setting for your domain as followed : zimbraPublicServiceHostname correo...
Header with X- are optional so can delete it, but the others are mandatory (need to check into RFC). This is possible to modify Header, but it is quiet hard because you need to tune your Postfix deeply with regex and so on. And each modification must be documented because of Zimbra update which does...
Sorry it was too long for me, you should have pasted the essential not the full trace.
In addition did you read the contain of the link I provided ?
Did you check in the other log what could have happened just before the JVM exploded ?