Desktop postcode lookup
Proxy Server settings
The postcode software can be set to use Proxy Server using this file.
The following ports should be opened if the system does not work through the corporate firewall:
www.simplylookupadmin.co.uk port 80 (HTTP/HTTPS)
Also in the installed directory is a file called "RegServerProxySettings.xml", which allows your to set the address of your proxy server:
RegServerProxySettings.xml
https://your_proxy_server:80