Zimbra Security Question:  Allow / Block embedded javascript or tags?

Technical requirement: Ability to send in plain text and rich text and HTML (limited HTML, no javascripting or harmful tags)
Can javascript or tags be embedded in an email through the Zimbra interface?
Also, Zimbra has developed ALE (AJAX Linking and Embedding), a technology that allows users to embed applets into e-mail. For example, users can share a live spreadsheet in e-mail, rather than sending copies back and forth. Are applets a potential security risk? Can they be blocked?
Thanks for your time.

Hi guigs2,
if there is no problem in open the bug ticket being a simple user I'll report by myself (if I haven't misunderstood you). (Confirm this and I'll do myself).
About the AJAX problem, here we have a sample test that works after toggle the preference:
http://www.w3schools.com/xml/xml_http.asp
I know about noscript and I don't like it. I prefer to do manually (those measures and more). What bothered me is that even toggle the preference, what in the past did the job of stopping the execution of scripts, now doesn't. In about version 24 it was only happening to event listeners not being blocked (used nowadays for dynamic events assignments). Now is with every javascript code.
About the tracking methods, I'm aware of HTTP tracking without any need of javascript. Even a simple "knock knock" on any kind of server leaves a trace.
I was just pointing that this preference stopping doing its job (stopping scripts executions) has the worst sceneario in a security way with XMLHttpRequest calls.
But one of the things that bothers me too, and it is not related to tracking, is that, in humble machines as mine, some javascript codes make drop whole performance and the preference toggle now does nothing, so the script keeps running without being able of doing anything and sometimes you don't have the option to load a page without javascript because you need some feature of that page that requires javascript what becomes "all or nothing".
Regards.

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