Auspost needs to know item dimention, weight, number of packages and shipping method.
AusPost doesn't do anything with the dimensions. I've tested it. The VirtueMart module does the same as this.
AusPost only uses the dimensions to validate the fact that the package is in fact shippable. The dimensions have no bearing on the cost. When 'don't send dimensions' is selected, I actually send dimensions of 250x250x250, just to retrieve the quote.
Joined: 10/10/2007