That might work a tad better, yep. The Return-path: rule is header-only as is the local sent Received: rule, but the others are body-only.
Is the local sent Received: rule looking for bounces that resulted from an SMTP reject, so the message comes from your own mail server?
How did you end up with any real bounces that had your msgid without your from, or was that the result of the same error as the one FP?
-- sidney
