Moderation - Email Address Counts not working as expected

I have configured our environment for Moderation to allow 0 email addresses in content.  There is no Exempt content on the second tab. 

However, when I make a sample comment, the comment does not get automatically get flagged as abusive as I am expecting; it is still visible in the forum.  

Is there an additional configuration needed to make this work, or does this setting have a different outcome than I am expecting?

Thanks.