By law, with a few exceptions (Sunday newspapers being one of them), it is against federal law for anyone to place anything inside of a mailbox other than employees of the US Postal service and the owner of the box, who may place outgoing mail in the box. Where these boxes are owned by the US Postal Service, that makes perfect sense. However, many of us have to buy our own mailboxes. For example, I bought a very large box, as we are sometimes away from home for long periods of time. I chose the box, I bought the hardware required for mounting the box, and I mounted the box. If I wanted to subscribe to a newspaper not delivered through the mail, why should I have to mount a separate container for the newspaper delivery? There's plenty of room for both, and it's my box. This is a purely rhetorical question since the only newspaper I subscribe to comes through the mail, but it seems odd that laws should be applied to the use of a mailbox that I own.