Q1: Will this allow for tracking and management of shipments not created through Postmaster?

Q2: Will this allow for monitoring of preprinted shipping labels (e.g. RMA labels or https://store.burrellimaging.com/index.php/supplies/mailers-...), with web hooks when they are used for a shipment?

Q3: When creating a shipment, will it be possible to specify rules for the "service"? E.g. "cheapest service with delivery by X date, but no more than Y dollars."

Q4: Can carrier specific account numbers be provided for lower shipping rates (and so shipments will be tied to account for claims, etc.)?