@coach joe posted:If I remember correctly the green mailboxes contained mail being delivered by the letter carrier, no slot just a locked door on on side, and the boxes for depositing mail were blue.
I have been a Postal worker for almost 30 years. Coach Joe is correct here with the exception that the locked door on the green box was on the front not on the side. Sometimes the green boxes were right next to a blue box and sometimes they were placed by themselves. A truck driver or a different Letter Carrier will fill up the green box in the morning with mail that is in walk sequence and then later on another Letter Carrier would work out of the green box by delivering the mail that was in the green box. This usually took 3 or 4 several loops where at the end of each loop the carrier was back at the green box. This has been my experience in NJ. Sorry I just saw prrhorseshecurve's response. He is correct they were called relay boxes.
