Dream about post box suggests your playful attitude or your child-like emotions. You are overreacting in some situation. You can no longer suppress your emotions. This stands for some sort of anxiety in your life. You are seeking calmness and tranquility.
Post box dream represents the beginning of new changes in your life. You feel that you are under attack. You are giving in too much into your impulses. Your dream signals feelings of hopelessness. Someone is nagging you.
If you dreamt about post box:
Someone is withholding information that you need in order to move forward on a certain project. You are not able to make your next major career move until you understand this piece of the puzzle. Be pro-active instead of sitting back and waiting.