SMTP Module access socket error

I converted the module- MxSMTPServer from 3.2.1 and imported it to 4.0.1. I do get the following error when trying to start up: kZ: com.mendix.core.CoreRuntimeException: java.lang.RuntimeException: access denied ( localhost:25000 listen,resolve) at MxSMTP.StartServer (JavaAction : 'Call 'StartSMTPServer'') Looks like security in java not being active. In 3.2.1 it is working at least and starts up and picks up incoming email. Is it because of the java version difference in Mendix 3.2.1 to 4.0.1? Or is it something I am missing? Tried policy files, tried granting port access, turned firewall completely off, nothing works. Any help appreciated.
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