Review for tasks & mails by Tajin
Rated 5 out of 5 stars
Wonderful add-on. I've been looking for an easy to handle add-on, that allows to link mails to tasks for quite a while.
"tasks & mails" does just that!
The ability to generate customizable reports also comes in very handy. I can now easily select and archive all mails related to a specific task, once it is done.
To create your own collections, you must have a Mozilla Add-ons account.