On Fri, 8 Jan 1999, Robert A. Earl wrote:
> Is there anyway to stop forged messages from making it to the list
> (other than moderating and verifying received-from headers)??

Not that I know of, but a good way at preventing this from happening
is to deny people from seeing who is subscribed to the list and also
require, at the very least, confirmation for all subscription requests.
This strategy is what I use in maintaining a pair of Listservs which have
a combined total of about 700 lists and we rarely get any spoof incidents.