reverse the order of messages in a mailbox?

Does anyone have a script which would reverse the order of messages in a
mailbox?  I could think of some solutions making use of formail, $FILENO,
and sort, but if someone has already done this, why re-invent the wheel?

Thanks.

-- 
Robert Brown                        |         Continuum Software, Inc.
Programmer                          | 800 West Cummings Park, Ste 4950
mailto:robertb(_at_)continuumsi(_dot_)com      |            Woburn, MA 
01801-6504
voice: 781-932-8400 x100            |                fax: 781-932-2558