Subject: Does anyone know what the X-UIDL mail header is?
To: 'netbsd-help' <netbsd-help@NetBSD.ORG>
From: John Maier <JohnAM@datastorm.com>
List: netbsd-help
Date: 08/20/1996 14:45:00 
I've seen this hidden among the subject and from lines of some of my   
emails, what is it?

thanks
jam