This is the MarketPress AusPost Shipping Plugin. It uses the AusPost API to calculate shipping pricing domestic and international deliveries for the e-commerce plugin MarketPress by WPMU Dev.
INSTALLATION and USAGE
Upload this file to /wp-content/plugins/marketpress/marketpress-includes/plugins-shipping.
MARKETPRESS STORE SETTINGS
Products -> Store Settings -> General Tab -> Location Settings
Set Australia as country (if you don't do this you can see the plugin as a Calcualted Option in the Shipping Settings), the select your the state and post code when you ship from.
AUSPOST SHIPPING SETTINGS
Products -> Store Settings -> Shipping Tab
Shipping method: Calculated Options
Shipping Option: AUSPOST
Measurement System: Metric
Enter your AUSPOST Developer Kit Access Key
Set the AusPost services you provide
Rename Service Label if you want
Add shipping pricing rules if you want
N.B. When you update your MarketPress plugin, you will need to reinstall this plugin. All settings should be saved.