I'm sorry Peter, but you seem to have a private conception of RFC822. The "Sender:" field is supposed to be the physical network address that generated the message. Like your boss's secretary or a friend of yours who's letting you use his account. The "From:" is the actual human person who wrote the message. You should note that RFC822 allows a "From:" with NO NETWORK ADDRESS if the "Sender:" is present: Sender: Secretary office <ADMSEC@FRECP11> From: Prof. Martin Schmidt This is of course not supported by most MAILERs (nor by LISTSERV) and I find it stupid, but here it is. It clearly shows what the sender is. And in no way can I see the sender as being the list administator, who has taken no part in the redaction of the message (which one by the way, there can be several owners). So if I generate a sender, it must be either the LISTSERV id or the list id. I know I have already replied to your remarks 100 times, but let's do it again: you seem to treat LISTSERV as a MAILER. A MAILER should merely add a RECEIVED tag (and maybe some more like Message-ID if it needs to) and leave the rest unchanged. LISTSERV is not a mailer. It receives a piece of mail as input and creates a series of output mailfiles using a particular algorithm, but I don't see it as a mailer. For one thing, if it were a mailer it would not need a Crosswell MAILER to operate. LISTSERV is rather a kind of server to which you send a command requiring that a particular text be sent to all the members of a particular list. It could do as you want, and merely add a RECEIVED tag. It could also generate RESENT- tags. It could generate new tags like Origin-List: or Newsgroup or suchlike. It could do a lot of things with the mail header, but presently I chose to strip it of all the useless junk that makes ARPA mail headers illegible. If you want to keep the junk then SET listname FULLHDR, but this won't prevent LISTSERV from generating a Reply-To and suchlike. By the way, if LISTSERV were to do as you suggested, the replies would be sent to the person who wrote the contribution, not to the list. Eric