This is supported by the XMission mail server. You are using the Open Source Edition on your own mail server. You need to install it server-side before it will work with your browser.

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• Using the drag-and-drop feature over your office network connection, your uploads should be pretty fast. When using DSL or Dialup please understand that the upload lacks a progress bar. It may act like you did nothing, but the little “page loading” circle will run in the upper right corner of your browser window. Once the upload is completed your file should show up.

http://bugzilla.zimbra.com/show_bug.cgi?id=24694 Upload Progress Indicator for DnD Ext

• You cannot use the drag-and-drop feature when launching a separated Compose window. It only works withing the primary Zimbra Suite window. http://bugzilla.zimbra.com/show_bug.cgi?id=24797 DnD Zimlet needs to take advantage of new compose window

http://bugzilla.zimbra.com/show_bug.cgi?id=24862 Update common zimlets with attribute to load in detached windows

• Only Firefox is supported. Consider this a perk for using Open Source software!

http://bugzilla.zimbra.com/show_bug.cgi?id=27153 Multi-Browser/Platform is planned with http://browserplus.yahoo.com

Using it in the HTML web-client: http://bugzilla.zimbra.com/show_bug.cgi?id=31751

Mace: I tried this with ff in OSX. Doesn’t work for dropping files into the briefcase which is why I installed it. It should: http://www.zimbrablog.com/blog/archives/2007/12/one-of-the-coolest-things-ever.html (I’m not a mac person, but use it all the time with FF & ZD’s Prism on Linux & Win)