Good Idea! Rated 4 out of 5 stars

This is very good idea of selecting (Filtering message) but it is for only todays message but what if I am not used my computer for say a week and I want all my messages for a date from all my configured many accounts?

So if ability to select a particular date will enhance productivity of the application.

This review is for a previous version of the add-on (1.2). 

Thank you for your review.
I write your idea down . It may be interesting for the next versions.