How to setup JAMES in corporate LAN to send internal emails only

[Cheng Wei Lee]

I followed the quickstart wiki but just couldn't get JAMES to allow sending
emails to internal email addresses. It kept connecting out. I'm behind a
corporate proxy and firewall. I was able to get JAMES to work out of the box
in previous release. But after upgrading to 2.3.1, I can't get it to work.