订单发货时是否可以通过PayPal通知?

I have PayPal Express checkout integrated in our website.

The shipping information is passed on to PayPal so that I can us PayPal's print shipping label feature. Once a label is printed for a specific transaction, that transaction is marked as such in the account overview.

Currently I am copying and pasting the tracking number into my website order so as to notify the customer that the order has shipped.

I figured it might be possible to automate that by checking with PayPal's API to see if an order has been shipped and, if so, get the tracking number.

I have not been able to find anything but this made me wonder on PayPal's IPN Summary Page

Instant Payment Notification (IPN) notifies merchants almost instantly about transaction events, such as:

[...]

Merchants can act based on the information they receive. For example, they can:

Update their inventory.

Email a purchase confirmation.

Trigger order fulfillment.

Enable download of digital media.

Update their customer list.

Email a shipping notification.

Issue a refund.

Update accounting-related information.

"Email a shipping notification" caught my eye.

Why would they mention that if it were not possible to get tracking info from PayPal IPN? Yet I have been unable to find anything. Any insights?

Although it's not the method you are looking to use, an option available is when creating the shipping label in PayPal, you can enter in the customers email address in the form with their address and they will then receive an email from PayPal with the shipping information.