Most listserv communities that I have been a part of have used the private
configuration.  In my opinion, if someone wants to post something to the
list for all to read, then they should be a part of this community.  If
this community is not important enough for them to have subscribed
themselves, then why should they wish to post a message here?  No matter
how relevant the message may be, mail from parties not subscribed to a
list is something I would consider to be spam.

Anna Creech, MLS
Serials/Database Cataloger
Eastern Kentucky University
(859) 622-3062

"I used to lament, for I had no shoes, until I met a cataloger who had no
books."
    --Bob Mead Donaldson, ca. 1974.