Interesting points. MyPost eBay import, includes the buyer's email address for Australia Post to send the notifications. eBay will have to anomalise that feature as well and then Australia Post will need to re-engineer their interface for tracking updates via eBay. Imagine the extra traffic that will create with a minimum of 4 emails per order:

Send tracking notifications to this recipient (optional)

If selected, delivery notifications keep the recipient updated when the parcel is:
1. Being prepared by Australia Post
2. Onboard with the driver for delivery
3. Had an attempted delivery
4. Delivered