Mark wrote:
Set everyones moderation bit. Do not set emergency moderation.
Go to Privacy options... -> Sender filters and set member_moderation_action to Reject and put your message text in member_moderation_notice.
I replied:
Why, yes, that's perfect. Thank you, Bill and Mark. Can't think why I didn't spot member_moderation_*. Now all I have to do is use withlist to change the rest of the lists.
Actually, it's not perfect. Emergency moderation seems better than setting everyone's moderation bit.
Setting everyone's moderation bit either requires manually visiting each admin page (for ~75 lists) or writing a more complicated script to achieve what that does. Worse, it loses the record of who was set to moderation before this, making it much more cumbersome to undo.
Is there any reason you're counseling against emergency moderation?
-- David.