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.
If using postfix,you can easily set up an header filter to block such spams,no matter how many they send,all blocked:
/^Received-SPF: softfail \(hotmail\.com/ REJECT Forged email decleard from hotmail.com!
