There are several parts of a mailbox, including  Installation pole- The base or the pole on which you will fix your mailbox.  Hooks for a newspaper- Although some mailboxes are big enough to fit in a magazine, newspaper, etc. Small mailboxes can only hold letters or pamphlets. For that purpose, a hook below the mailbox is installed.  Lock- The locking mechanism to keep the lid of the mailbox in place.   Mailbox lid or door- The part of the mailbox that opens or closes to take out the mail. Frame- It is the basic structure of the mailbox.