Comment 62 for bug 119899

> I feel we should be user-feature lead rather than server-feature lead.

If the implication is that this was broken on purpose, that's mistaken. We didn't realize at the time that this was going to break filter after the fact for custom headers for IMAP.

Yes, IT developers can install TB 2 with a preset list of custom headers via several mechanisms - from the lightweight: adding a new aaaa.js in the defaults/prefs install dir with the mailnews.customDBHeaders pref set, to heavyweight - using MCD to control users prefs from an http server.