Thank you Mark.
I am sorry if I am not clear. I want an announce list that only I can post to. Now it is discussion. I want to change it so that my users cannot. I thought all was ok but I am confused when you say "What I didn't say this is not sufficient to prevent posting to the list."
MAILMAN 2 What I got from the Mailman 2 Wiki is "How to restrict the list so only authorized persons can post (moderation). If there is an option like that in Mailman 3 I want that.
SUMMARY I want to be able to reply personally to the user if necessary without his or her message going to the list. So something like moderation.
So let me take a guess:
Default action to take when a non-member posts to the list AND Default action to take when a member posts to the list
should be set to HOLD FOR MODERATION?
Then I can first read the post, contact the person if necessary, and then delete the message?