It needs to work again Rated 5 out of 5 stars

Well, now that Mozilla obviously never got round to developing this functionality themselves, how about updating it? I am running 17 and it doesnt work - I couldnt get it to work on 16 (which is very broken anyway) either. This is a great Add-on, and really it should be part of the Thunderbird Addressbook system. I don't plan to stay with Thunderbird into the far future, as their refusal to move away from mbox to Maildir has just placed them well and truly in the Too Silly To Persist With basket, but in the meantime its my main email client and I really like being able to flush the filters backwards as well as forwards.

This review is for a previous version of the add-on (1.0.5).