Rated 3 out of 5 stars

This provides a crucial missing feature for anyone who wants to practice Inbox Zero: the ability to retrieve the rest of the thread (stored in other folders) from a single message in the Inbox. The one (serious) drawback is that it becomes very slow with large IMAP folders. Since I like to store my entire email history, that makes the plugin almost unusable :(

This review is for a previous version of the add-on (1.0.510).