A note dated Tue, 7 Mar 1995 08:09:37 -0800 asked: > To: Multiple recipients of list LSTSRV-L > Hi all, > > I've got a question. I had a subscriber ask me about the Header= > options. I looked at the LISTSERV REFCARD (23 January 1995) which > says: > > FULLbsmtp or FULLHdr -> "Full" mail headers > IETFhdr -> Interent-style headers > SHORTbsmtp or SHORTHdr -> Short (default) headers > DUALhdr -> Dual headers, useful with PC > or Mac mail programs > > This isn't much information. Can anybody elaborate on this? This answer is based on what I've seen; if I miss by too much, someone who knows the code ought to elaborate. First, a user sets one of these options on his/her subscription to a given list to control how the headers look on the mail that the list sends to him/her. Anyone, of course, can try the different settings and see what they do. Let's start with "Short" (default). Since this is the default, it may well be what you see at the top of the note you are reading. The To: is a stylized "To: Multiple recipients of list ....". The "Received" lines that show the path the mail followed show the path from the listserv to the recipient. Next, consider "Full" headers. This is a proper superset of "Short". Some additional lines are present, e.g. X-to:, which shows how the original was addressed. The "IETF" headers are not a sub- or super-set of those shown previously. These headers appear to show as much as possible the headers of the note that arrived at the listserv from the original poster. I am on one list where people write in about their e-mail problems, and I find "ietf" headers useful there, since they let me learn the most about the poster's mail system. Finally, the "Dual" header option causes the listserv to make an extra copy of the headers in the body of the note. This is invaluable for people who are forced to use crippled mail systems that insist on throwing away certain header lines. The most usual of these either do not show the "Reply-to" or the "From" lines, where in listserv contexts, both are needed (one shows the list, the other shows the original poster). Getting "dual" headers gets past such a mailer by placing the extra copy of the headers in the body where (with luck) the mailer will not delete the information. -- Pete Hoyle - William & Mary Technology Services Computing Support [log in to unmask] - (804) 221-4357 (221-HELP)