I have just created a new list and the posts from/to subscribers are being received and delivered as expected. All is well there.
However the messages are also being delivered to the administrators who are not subscribed.
And if the administrator is a subscriber, they receive two copies of the post.
Have I missed a setting, or have I screwed up the plumbing somewhere?
Nothing is leaping out at me from the logs. Any advice on where I should be looking would be much appreciated.
PS. Mailman 2.1.39 / Debian / Postfix