here is a part for UPS
so the email address QuantumViewNotify@ups.com is primary
this links the communications to UPS.
The email must include the PO# generated by ofbiz.
the service will match the PO with the Customer Order
link the Tracking number to the Order # (already code for this)
put the Link from the email to check on the Tracking progress.
Second service check the link from UPS website and extracts The shipping data.
when UPS marks the tracking number delivered will mark the order delivered.
Third service check the promised delivery date against the actuall delievery date and send a task if the deliver date exceed the promised date.