I agree with John about the drawback of enabling this option. As the list Owner, I see the failed attempts to post all the time and often respond by posting the message for them manually. It definitely increases the workload on the list maintainer, which is an obvious negative, but it also reduces the spam, which is an obvious positive. Rick John McCormick wrote: > > 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 -- Richard Conn mailto:[log in to unmask] http://monmouth.com/~conn/ Opinions expressed are my own and not necessarily those of anyone else.