Rated 5 out of 5 stars

I really like Quickfilters in Thunderbird. It helps me keep my inbox down. I use it to create filters for maillists and correspondents I want to put in their own folder. I also use it to send emails from senders I don't want to see-- to the trash. It instantly creates a filter with that sender's name. After a couple of weeks of this my spam is way down. (I also use an external anti-spam service, but they don't catch it all).

This review is for a previous version of the add-on (5.2.1).