Dear Seniors, I thank very much the Seniors RBURNS, STAN, MAYNOR, SSHEA, RHIEL, KLASSEN, ERIC for sharing your expertise on the moderation issue. Now I have a much clearer idea with your help. I will discuss with my SysOP the "least-violence" alternative: i.e. the flags Subscription=By owner, Private, Reply-to: Sender and UNmoderated and even creating a sub-list (common in the UK) for searches of nature: "Does anyone know ...". I guess if this would't work out we go over to OMNET :-) Thank you again. Aldo-P. (FISH-ECOLOGY).