By popular Demand !
The Rockport Single Mailbox Post

Based on the Rockport-Double, but for one mailbox - on the side of the post.  This classic will stand the test of time and the test of kids.  White or Black, Clay, or Granite.  Installs over 4 x 4 wood post - not included.  Mailbox mounting hardware not included.  Can be used with the Whitehall Mailbox, the Bellevue Mailbox, as well as many others.  Use the Ground Screw to install easily.  Mailbox can be mounted left or right of the post.

Instructions for Coronado or other heavy mailboxes over 10 lbs., drill two holes in the back of the mailbox and use lag-bolts to attach the mailbox directly to the post such that the post supports most of the weight of the mailbox - per these "Heavy Mailbox" instructions.