E-freight is when cargo is exchanged paperlessly. All documentation is done electronically.
For example, Amsterdam Airport Schiphol and Korea's Incheon International Airport signed a Memorandum of Understanding where they will cooperate to develop e-freight paperless air cargo.
It is often hard for airports because their systems need to be able to work together.
(http://globalairportcities.com/incheon-and-schiphol-pursue-paperless-cargo-push.html)