Ask your listserv-maintainer about the advisability of such a course of
action.
It does not keep people from being able to post to the list if they EDIT
their replies. Please see below for my standard blurb. It is effective
(over time). Most of the recipients of our list appreciate not having to
read the same material over and over in replies, including any signatures
and banners.
leftDear
If you want this distributed to all of xxxxxx-L, you will need to remove
the original "headers" that you included in your reply: the software does
not allow you to include them, thinking that it is a "loop."
Additionally, please remove all other original signatures and text NOT
essential for context -- sometimes all you will need is a relevant
SUBJECT: RE: line in your reply.
Otherwise, simply forward to your intended correspondent.
Thanks.
Pete Weiss at Penn State