An admin can set some options: anyone can join y/n, only members can
post y/n.
Most effective way is sadly probably to moderate requests for new
members and to only let members post.
Really a problem on google groups. Apparently the easiest way to spam
mailinglists.
Reinout
Good idea. googlegroups is suffering from a spam problem.
Reinout
--
Reinout van Rees - rei...@vanrees.org - http://reinout.vanrees.org
Programmer at http://www.nelen-schuurmans.nl
"Military engineers build missiles. Civil engineers build targets"
Johann