I wanted to visit a friend in a residential block. Because he was not at home, I wanted to write a letter. But I didn't found a letter box. Then I looked to other residential blocks - the same! No letter boxes! How do you receive mail without letter boxes?
:-)) Letter boxes are located behind this door. I don't know how to cope postmen. When we do a visit, we usually use mobile phones, the hosts open a door. :-))