Thanks for posting this question Alex!
As far as filtering based on categories, you can do so by clicking the funnel icon:
As you can see here, I'm able to select from the different color categories to filter emails by. While we don't have the ability to pick a given week and only see emails from that week, you can sort by date (using the icon with 3 horizontal lines) and scroll to the week in question. Let me know if you have any more questions regarding sorting or filtering!
Jorel Haggard
System/Network Administrator
SmarterTools Inc.
www.smartertools.com