Hi, We are sadly seeing a lot of spam on the list. It doesn't seem simple to get automagic spam filtering done. So for now I have changed the setting to "Hold" for messages from senders not subscribed to the list. I will go through the moderation queue at least once a day to not have too long delays.
Let me know if this is a problem. It should reduce spam. But might make it a bit inconvenient for non-members to post to the list :{ Cheers, Mark