I have a better suggestion -- upgrade to the most recent version of mailman. The new version of mailman has an option to automatically discard any message that's from someone who isn't subscribed to the list. It still sends them a message explaining the problem, but the admin doesn't have to see it. In my experience on another whole set of lists that I manage, this works wonderfully. The amount of spam that admins have to deal with goes to an absolute zero. Brion Vibber wrote:

Brion Vibber <brion(a)pobox.com> wrote in news:200305210012.02343.brion@pobox.com: I am list admin of Wikitech-l and Intlwiki-l. Since the removal of the @nupedia.com forwards my lits do not recieve a lot of spam anymore. Mostly there are to types of postings; - a list member who has used a emailadres where he is not subcribed whit. action: approve posting and inform the user that he used the wrong email adres and add that emailadres to the list of allowed posters. - a non-list member who wants to ask something. action: until now I approve it and send the poster a email to inform them how to subcribe. Problem; if the do not subcribe the do not recieve a responds. I think posters only wants to ask something and not understand the idea of a mailing list. Is it better to reject the posting and inform them the have to subcribe? The can see it like a insult if you reject. The posting can come from a non-wikipedian who only wants to send a email to "wikipedia". So far a know only the german and dutch wikipedia has a emailadres where visitors can send a question to. -- Contact: giskart AT wikipedia.be Ook een artikeltje schrijven? WikipediaNL, de vrije GNU/FDL encyclopedie http://www.wikipedia.be