Hello all, just wanted to drop a note here to alert admins of a possible problem.
As it stands, a site running Zimbra cannot be accessed from behind a BlueCoat (.com) proxy appliance. They are listing Zimbra sites as a site containing gambling or pornography. I have sent in a request for them to review a single site to release it from the proxy blacklist but I am betting this will affect any Zimbra site based on their blocking algorithms. Perhaps a Zimbra employee should contact BlueCoat to help clear this up for everyone.
Thanks, and I hope this helps someone who is seeing a blank browser after logging into their site.