Mail Boss Triple Mount Locking Mailboxes with Post

Mail Boss Locking Mailboxes Triple Post
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Retail Price:$822.25
Our Price:$715.00
  • Free Shipping
  • In Stock
  • Ships in about 1 to 3 business days.
  • Triple Threat! The MailboxWorks’ solution to high security multi-unit mailboxes.
  • The Mail Boss mailbox triple post mount system is designed for residential curbside mail delivery and to accommodate three separate mailboxes mounted on a shared mailbox post.
  • Each Triple Mailbox Post package includes 3 of Mail Boss’ popular high security locking mailboxes, featuring commercial grade security features including a y-pin brass core tube lock, patented anti-pry latch locking system and 12 and 14 gauge steel with powder-coat finish.
  • This triple Mailbox Post Design uses the Mail Boss 3 Box Spreader Bar, constructed from 12-gauge galvanized steel. When mounted to the Mail Boss post, three mailboxes can be securely mounted.
  • Select an In-Ground Post if you plan to dig a hole or install over an existing 4×4 post, or a Surface Mount Post option for fastening the post to the sidewalk or curb.
  • Mail Boss’ popular Fast-Trak Mounting system and hardware makes it easy to install these multi unit mailboxes in just a few minutes.
  • The Mail Boss tri mount mailbox and post system comes in 4 powder coat color options: Black, White, Bronze or Granite.
  • The MailboxWorks also provides the Three Mailbox Post system with 3 sets of 3 keys, reflective address numbers, drill bit and post mount mailbox installation hardware.
  • Not what you had in mind? View more Multi-Unit mailboxes at MailboxWorks.
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Product Details


Item Height (inches) Width (inches) Depth (inches)
Mailbox 13.5" 11.25" 21"
In-Ground Post 43" 4" 4"
Surface Mount Post 27" 4" 4"
Spreader Bar 2" 33.75" 5"


  • Mailbox Item Number: MBMMAILBOSS
  • In-Ground Post Item Number: MBPGM
  • Surface Mount Post Item Number: MBPSM
  • Spreader Bar Item Number: MBZTRISPRD
  • Includes: Mailboxes, Post, Spreader Bar, Lock with 3 Keys, Reflective House Numbers, All Assembly Hardware
  • Manufacturer: Mail Boss Mailboxes
  • Shipping Weight: 134 lbs.
  • Locking: Locking mailbox.