Rated 4 out of 5 stars

Want to give it five, but need to stop four really want to give a 4.9. Here's why.
If I start an email thread with my brother w/subject "whats up?", then weeks later someone sends me an email w subject "whats up?" they get grouped in same thread, even though the two senders were never sending/recieving the same email string. Aside from that, perfect

Đánh giá này là cho một phiên bản trước của tiện ích (0.6). 

Thanks for the review. The problem you're describing is actually a problem with Thunderbird. All this extension is doing is asking Thunderbird to resort the emails - it doesn't actually do any of the sorting itself.