There is no difference in the installer for Xeams Community and Enterprise Edition. It will run as if you have purchased the Enterprise Edition for the first 30 days. It will then get converted to Community Edition unless a license is purchased.
For the spam messages,i suggest to add an order by score. For example,the deleted score is 3000,virus is set to 1000. If you get 1000~3000 spams one day,it is hard to find these marked as spam by mistake.