> IETF headers are a religious issue. The very concept of changing the > subject line would violate the religious foundation on which IETF headers > are built ("Thou shalt not change the headers except to add a Message-ID: > if the message cometh from a sinful MUA that doth not provde one, to add > a Received: line with thine own host name and, if such is thy desire, to > add a Sender: pointing to the owner-xxx address"). I'm not religious about headers, but I find IETF headers to be useful in some circumstances. For example, we have a listmaster list with all our LISTSERV administrators on it. List owners vcan send questions to it. With IETF headers, I can tell that a reply was sent to someone who asked a question and cced to the list. With regular headers it's not obvious.