My Hero! Rated 5 out of 5 stars

This feature may give me what I've really needed and wanted for so long..., which is described in http://www.43folders.com/comment/337334/Missing-Email-Feature and https://bugzilla.mozilla.org/show_bug.cgi?id=229568. I just enabled cacheing in my "history" folder (which saves *all* my correspondence) and now I can "tug" on the thread of any message in my inbox to get back to anything backwards in history. I would be very glad to help you with your effort in any way possible, especially if it helps your system work efficiently on huge imap folders ;-)

Thank you! -- dave at boostpro.com

This review is for a previous version of the add-on (0.9.462).