Allegedly, on or about 17 September 2016, Bob Goodwin sent:
Is there a command to display only what I want, a specific day or perhaps reverse the order so that today's messages are at the top, display first? Better yet I would think would be to display them in Thunderbird but I don't know how to do that ...
Most decent mail clients will let you read a local mailbox (read files directly, without needing a mail server). Try configuring yours to read a local mailbox in: /var/spool/mail/yourusername
It'll treat that the same as any other mail you work with (read, delete, order the list of messages in the way that you want to, etc).