Hi I have a small suggestion that could make automation with this mod more possible.
The idea is the ability to rename stamps with locker id's and when right clicked, dispensed, or any other mod right click, it allows to instantly stamp the package with the directions to go to the specific locker id and sends it off automatically. An alternative is to allow placement of the stamp as previously stated but require another dispenser, etc. to use the package controller to finally send the package off. I am only suggesting this as I would love to make a way to have auto mail in a modpack my friends and I are doing.

A way to automate the delivery of packages is in the works, and you can expect to see it soon.