The Australia Post shipping modules provides an interface to retrieve realtime shipping quotes from Australia Post.
The Australia Post tab:

The following settings are available:
| Field | Description |
|---|---|
| Australia Post Gateway URL | The URL to the edeliver Australia Post shipping gateway The default URL is: http://drc.edeliver.com.au/ratecalc.asp |
| Weight limit for each package in grams (g) | Weight limit for each package |
| Package Length in millimeters (mm) | Default package length |
| Package Width in millimeters (mm) | Default package width |
| Package Height in millimeters (mm) | Default package height |