How do I offer Express Post
In order to offer Australia Post ‘Express Post’ to your customers, create a new Shopify Shipping method and add the word “Express” to your shipping title/name. It can be anywhere in the Shipping title, and our system will then assign Express Post to that order.
All other shipping methods that omit the word ‘Express’ will be fulfilled by the standard Australia Post eParcel method (for Australian addresses) or DHL (for international addresses).
*Note: The word 'Express' needs to be in the title/name of the Shipping Method itself, not in the description fields.