Very useful, but here's a suggestion Rated 5 out of 5 stars
I like this add-on a lot. We have many different group email aliases at work and this add-on saves me a lot of time not having to ready through each and every email that is addressed to a specific group. I can clearly see my name or some other keywords I specified (related to my job role or current projects I work on).
To make it even more useful how about adding a feature to highlight the email subject in the email list view. That way one could immediately identify the emails that have matching tags in them without having to open them.