Write a simple thunderbird addon
What the addon does:
On first run of the addon -
automatically creates sub folders using the name from all email recipients (people who have sent you email)
Automatically creates a rule to copy all emails from the recipient to the folder created with their name.
Runs the rule and places a copy of the messages from the sender to the folder with their name
After first run-
Rule should then be run when new mail is received.