Review for Subject Manager by barrydhill
Rated 5 out of 5 stars
This should be part of Thunderbird - but as Thunderbird development has practically ceased, thank goodness people are willing to develop add ons such as this, which really save so much time, making the emailing process slicker and easier - thanks guys!
This review is for a previous version of the add-on (0.3.4).To create your own collections, you must have a Mozilla Add-ons account.