I apologize for being careless - I misread the original email and thought the file to add outbound.smtp.binding.ip=192.168.0.2 to was service.properties.   I did not have a server.properties file but once I created it, restarted the server - I was able to send an outgoing message I was unable to earlier.

I will continue to monitor but I think (I hope) this has fixed the problem.

Thank you.