Its like the post office getting envolopes by the truckload, then
opening each envelope, read the content, to decide when to send the
opened letter for delivery, either by foot or car, claiming that such
a decision process will prevent envelopes from flooding the post
office, coming into the post office for delivery in the last mile.
There is, however, at least one more dimension with postal or package
delivery services. They offer different delivery priorities with
different
pricing, may have surcharges or refuse large content that the physical
transport technically could carry, and offer sender-pays and
receiver-pays
options.
The starting hypothesis is based on envelopes of the same size,
weight, colour, with no chemical powder in them, and all with the same
stamp value...
The emphasis, is the need to open the envelope to decide how to route
them...
F.
