 
            Hi Mark,
You: What is the content of this? Probably should be empty. Me: It is empty.
You: No, it doesn't interfere with header checks. Me: Okay.
You: What does Blocked mean? If you mean held for moderation, what is the reason they are held?
Me: We've changed from Accept Immediately to Default Processing. We'll investigate other settings that might be making all message Held.
You: If you have Default action to take when a member posts to the list set to Accept, that bypasses this check and many others. Me: As above--changed from Accept to Default Processing. File sizes should be limited now.
You: What do you have in your header filter rules?
More importantly, what are you trying to accomplish? I.e. what do you want to happen in the following cases?
Message To: the list, no Cc: -- Accepted
Message To: the list, Cc: to other address (non-member) -- Hold for moderation. 
Message To: the list, Cc: to a member's address –– Accepted
Message To: somewhere else, Cc: to the list -- Hold for moderation.
Message To: elsewhere, Bcc: to the list (require explicit destination
will hold this one) -- Hold for moderation.We're no longer concerned about Bcc because you explained it before. It's in the subject line here, but we're not concerned about it.
Thanks Mark, Cathryn