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.

This review is for a previous version of the add-on (1.02).