In our environment our server sits behind an HTTP proxy. Some of the content that the server has to go to the internet for on behalf of the client don't work properly. I'm guessing this is because of the fact that we sit behind a proxy. For instance the Yahoo Maps zimlet pops up a blank box but if you click on the address a new browser launches and works fine. In another instance RSS feeds in the mail box fail.
Is there an internal setting for Zimbra to access the web via a proxy?