> Message-Id: > <00A4C33A065C7009*/c=us/admd=imx/prmd=domain.name/o=co/ou=MSMail/s=LASTNAME/g= > FirstName/i=D/@MHS> > > I have narrowed the problem down to the fact that his mail system folds > (wraps to a new line) the long Message-Id: header line immediately after > the "Message-Id:" header tag. In the original message, that header line > contains: > > "Message-Id:" (space) (CR) (LF) (space) (space) "<00A4C33....>" (CR) (LF) > > LISTSERV appears to ignore all headers past this header, which includes > the important From: and Subject: headers. When LISTSERV distributes the > message to the list subscribers, it indicates that the message came from > an unknown origin, and does not provide a Subject header. The problem is that the continuation line (starting with "FirstName") does not begin with a space or a tab, as required by RFC 822. So it looks to LISTSERV like the start of a new header that is not properly formed.