Valorie,
I want to be sure that I get this right and not mess things up for 560 subscribers! If I understand correctly, the settings changes you suggest will prevent subscribers from replying to the whole list and only to the original sender? Those setting changes being,
Spam Control > Message Moderating > All messages moderated
But, I can not find an option to"allow new messages only to post." Where?
I note that I have set Message Policies > Reply To set to Sender.
Thanks for the tips.
/Roger