Thank you, we’ll consider adding the feature to future releases, but note that if you’re using sorting by date, emails can be assigned to groups such as Today, Yesterday, Week ago, which already helps you navigating through your mail folder. If you don’t have this setting enabled, just right click the Sorted by option in your list of emails and select “Show in groups”.
I saw this grouping and it is Ok.
But it would be nice to have an option to define own filter to show last n days without having to modify it on each day. (something like ‘show me all emails from last n days’)