DAY topics, then sort as you will.
Your new mailbox set up is clunky to use, and deletes (as in unable to be found) some messages that are NOT selected to be moved or sorted.
I am now missing a banking statement because your new mailbox system removed it from my inbox, but it didn't show up anywhere else.
I would really like to have the mail sorted by the TOPIC of DAYS - then if you want to add your "improvements" to it, fine, but at least I will (hopefully) not lose important messages!
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ranked