The moderating of the the first post by a subscriber appears to be creating more problems than it is trying to solve and maybe it would be worth turning that feature off.
If a week or more can go by where the first postings can go by before it is looked at, this only causes frustration and the result of test messages being posted by people. In my case I recently subscribed with a new address and it was frustrating that two messages did not appear for some time. Please Consider my suggestion. Dave Watkins