As far as I know (it's in the help for the listserv) the default
behaviour is *not* to mail messages back to the sender. There are
some listserv commands to modify this (remember to post to listserv
and not to cp if you try them)
set cp mail noack (the default - don't return your own mail)
set cp mail ack (*do* send messages back)
set cp mail postpone (don't send any messages at all)
To resume, after you have postponed, just set it to ack or noack.
-- Clarke Brunt (clarke@brunt.demon.co.uk)