Mail Boss Quad Mount Locking Mailboxes with Post

Retail Price:$1,131.00
Our Price:$904.94
SKU # mb-quad-package
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Learn more about our estimated shipping and lead times

Regarding a Product's Shipping Estimate

The lead times listed on this product page represent the best-case scenario for shipping estimates. While we may show that a product "usually ships" within a given period, this period should not be confused with a delivery estimate. Rather, we expect the product to ship from the manufacturer's warehouse within this timeframe.

What does this mean for you? Once you place an order on our site, we begin processing the order with the manufacturer. The processing lead time we list on the product page is the most current estimate from the manufacturer regarding the product.

Below, we answer our customers' top three FAQs regarding delivery estimates.

How long will it take to receive my commercial mailbox?

When you order a commercial or cluster mailbox, we process the order with the manufacturer within one business day. Once processed, the order usually ships in the time frame listed on the product page. Since Cluster Mailboxes are large items, they ship via freight carriers. As such, these transit times will usually take 5 to 7 business days.

A few things to note about purchasing a cluster mailbox or similar large, commercial-grade product:

  • The freight carrier will call the number you list on the shipping address a day before delivery to schedule a delivery appointment with you.
  • The manufacturer ships using their chosen freight carrier depending on the products ordered and the delivery location.
  • Most (if not all) online retailers who sell commercial mailboxes (CBUs, etc.) ship directly from the manufacturers, just as we do.
  • If you choose professional mailbox installation with your commercial mailbox purchase, please note that same-day installation is unavailable. We will help you schedule the installation after the delivery of your mailbox. In most cases, our installers complete the installation within one week following delivery.

If you purchase a commercial mailbox from us and decide to cancel because a competitor lists a "faster" lead time on their site, you may be delaying the time it will take to receive your mailboxes. Why? Because you are placing a new order with the same manufacturer for processing.

What if I order multiple products from different brands?

If you order multiple products, you may be purchasing products from different manufacturers. If this is the case, your products will ship to you separately from each manufacturer.

For example, if you purchase a set of wedge anchor bolts with a cluster mailbox, your CBU will ship from Florence or Salsbury's warehouse in about 5-7 business days. Still, your anchor bolts will ship separately from another warehouse in about 1 to 3 business days.

How can I estimate my shipment's transit time?

Depending on the carrier and your location, transit times will vary. You can estimate delivery times using your carrier tracking number. Once your order ships, we'll send you a shipping confirmation email that includes your carrier (FedEx, UPS, YRC, etc.) and tracking number.


If you place an order with us and do not receive an Order Confirmation email, check your spam inbox. If you still do not see an Order Confirmation email in your inbox, contact us immediately at (866) 717-4943. We will provide you with your Order Number and any other details you need.

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Product Details

  • The ultimate in Quad Mailboxes!
  • This USPS approved quad mount mailbox sets the standard for high security and the best protection against mail theft, identity theft and vandalism.
  • Each Mail Boss Quad Mount Mailbox system comes with 4 of Mail Boss’ highly popular locking mailboxes. Each locking mailbox features a commercial grade 12-disc wafer lock, patented anti-pry latch locking system and 12 and 14-gauge steel complete with powder-coat finish.
  • This 4 multi-mount mailbox system comes with Mail Boss’ 4 Box Spreader for mounting the 4 mailboxes. This turns the Mail Boss’ legendary post into a multi-mailbox solution! Made from 12-gauge welded steel and available in matching powder-coat finishes.
  • Choose from the standard In-Ground Post or upgrade to the Surface Mount Post if you need to fasten this Mail Boss multi-unit mailboxes to the sidewalk or curb.
  • Attractive powder coat finish options include Black, White, Bronze or Granite (see below).
  • Each Quad Mount Mailbox system also comes with 4 sets of 3 keys, plus reflective house numbers, drill bit and post mount mailbox mounting hardware.
  • Check out more Multi-Unit mailboxes online at The MailboxWorks.


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" 47.5" 5"


  • Mailbox Item Number: 7105, 7106, 7107, 7108
  • In-Ground Post Item Number: 7120, 7121, 7122, 7123
  • Surface Mount Post Item Number: 7126, 7127, 7128, 7129
  • Spreader Bar Item Number: 7134, 7135, 7136, 7137
  • Includes: Mailboxes, Post, Spreader Bar, Lock with 3 Keys, Reflective House Numbers, All Assembly Hardware
  • Manufacturer: Mail Boss
  • Shipping Weight: 175 lbs.
  • Locking: Locking mailbox.