On Tue, 14 Apr 1998, Richard Conn wrote:

> Some email list servers (I use CREN Version 8 at WUARCHIVE)
> allow the lists to be configured in a variety of ways, controlling
> who can post messages to the list, who can join the list,
> whether the list is moderated or not, etc.
.
.
> I don't know if the list server employed by ACM allows this level
> of control or not, but this is an option open to us.

ACM uses Listserv software.  It has all the options mentioned by Rick
including restricting posting to subscribers of the list.  ACM Support
folks recommend not using this restriction option.

The major problem with restricting posting to subscribers is with e-mail
addresses.  You can only post if your return address is identical to that
in the list's list of subscribers.  For many people, that means it is not
possible to post from a different machine than the one they subscribed
from.

I am going to use this restriction option on the new SIGAda member
discussion list (coming real soon now).  I expect that I will be deluged
with e-mail from folks who are not able to post, change their list
options, or remove themselves from the list because their sending address
is not an exact match of their subscription address.

John

-------------------------------------------------------
John W. McCormick                 [log in to unmask]
Computer Science Department       voice  (319) 273-2618
University of Northern Iowa       fax    (319) 273-7123
Cedar Falls, IA  50614-0507