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.
We are not able to recreate this problem. Could you please contact us via email and send us the sample message from this domain using the method mentioned on https://www.xeams.com/forward-sample-to-support.htm