In this tutorial, we learn how to install a new mailbox post and box with Lowe's. First, you will need to gather all your tools and a new mailbox. After this, print out directions for the project through the Lowe's website. Now, call 811 to call your utility company to make sure you aren't digging through an electrical line. Mail boxes have a specific height they need to be installed at, so make sure you follow these guidelines. After this, dig out the hold from the ground, then fill in gravel to the hole. Now put your post into the hole and level it out. Now pour the concrete mix into the hole, followed by water and wait for this to dry. Now, add the postal box with screws and you will be set to receive mail.