[Mohsen Moeeni]
Fristly excuse me for cross-posting. Actually, I did not like to be the person who comes this up however the amount of spams which is propagated thru the lists is annoying. I wonder why the guys at Zope Inc. does not tweak the list settings so posting is only allowed by the members.
Perhaps just the weight of history, and/or trying to keep the barriers to participation as low as possible. Speaking as zodb-dev's list admin, I'd be happy to restrict posting to members, *if* people don't object to the idea. I spend an increasingly resented part of each day doing list-admin triage (for zodb-dev and about 6 other mailing lists). A predictable irritation is that Mailman's answer to "member?" is based on the posting's sender's email address, but many people post from more than one account. If you want the default action for non-member posts to be "hold for review", I won't do it -- I can't afford the additional time sink. "reject" is the no-manual-intervention default action, but it would place a new burden on members posting from non-member accounts (their posts would be rejected, at least until they asked the list admin to add their other posting accounts to Mailman's list of non-members to accept -- and they would need to do that on a per-list basis).