How to Install Your Modern Mailbox Post Into the Ground

Installing a modern mailbox post might seem like a straightforward DIY project that you can do quickly with a few tools, but the difference between a post that lasts five years and one that holds strong for decades comes down to how it’s set in the ground. If you’re wondering how to install a mailbox post properly, especially one designed to slide over a wooden 4x4 mailbox post, this step-by-step guide walks you through it easy steps.

This modern mailbox post slides over a standard wooden 4x4 post for a sturdy, clean-looking install that delivers great curb appeal.

You’ll set the wood post in concrete first, then secure the steel mailbox post sleeve over it.

Step 1: Remove The Old Post And Prep The Area

Remove any existing mailbox post and clear the area where you’ll be installing.

Step 2: Dig Your Hole

Dig a hole about 18 to 24 inches deep and roughly 10 to 12 inches wide (wide enough to set and brace a 4x4).

Step 3: Set The Wooden 4x4

Place your pressure-treated wooden 4x4 mailbox post into the hole. Use a level to make sure it’s straight on all sides.

Tip: Brace the 4x4 with scrap wood so it stays perfectly plumb while the concrete sets.

Step 4: Set The 4x4 In Concrete

Use quick-dry concrete to secure the wood post.

• Pour 3 to 5 inches of dry concrete into the hole
• Add water and mix
• Continue filling with concrete, adding water, and mixing as you go
• Let the concrete set fully before moving on

Step 5: Slide The Modern Mailbox Post Over The 4x4

Once the 4x4 is solid, slide the Post & Porch steel mailbox post sleeve over the wooden mailbox post. Make sure it sits at the correct height, then check that everything is level.

Step 6: Secure The Post In Place

Use the provided hardware to tighten and secure the steel mailbox post to the 4x4 so it’s snug and stable.

Step 7: Mount Your Mailbox

Place the mailbox on the post-mount and install the provided bolts. A Phillips-head screwdriver works well here for tightening.

Step 8: Add Your House Numbers And Mailbox Flag

Apply your mailbox numbers and magnetic mailbox flag.

Enjoy your new curb-appeal-boosting mailbox!

Tip: USPS recommends that modern mailboxes be 41 to 45 inches above the ground (that's from the street level to the bottom of the mailbox!). 

• A Modern Mailbox (we recommend The Malone)
• Mailbox Post
• Quick-Dry Cement
• Wrench
• Phillips-Head Screw Driver
• Level
• Bolts
• Mailbox Numbers
• Magnetic Mailbox Flag

Looking for a modern mailbox that’s stylish and built to last? 

Whether you’re shopping for a housewarming gift to give to a new homeowner friend or upgrading your own curb appeal, the right mailbox makes a difference. You want something that reflects modern design, stands up to the elements, and offers lasting functionality. 

That’s exactly where The Malone comes in.

For homeowners who care about both aesthetics and performance, The Malone is the ultimate modern mailbox. It’s chic, secure, and built to last – making it the ideal companion to other curb appeal accessories. With its sleek silhouette, customizable color options, and sturdy construction, this large mailbox and post combo makes an instant curb appeal upgrade.

Why The Malone by Post & Porch stands out as a modern mailbox for gifting:

• Weather-resistant design: Built with 14-gauge steel and powder-coated for longevity.
• Customizable options: Available in five colors with interchangeable, thick magnetic mailbox numbers, including an elegant and classy black locking mailbox design. 
• Secure locking system: A dual-layer secure mailbox system keeps mail safe.
• Modern mailbox design: Elevates front yards, entryways, and curb appeal. 

Check out these 5-star reviews on The Malone modern mailbox:

• “Solid and good-looking modern mailbox. Definitely adds a touch of class to our curb appeal. Love the magnetic address numbers. Easily post-mounted. Post, mailbox and house numbers are all built to last.” - Dave G.
  
• “This post-mount mailbox is a lot heavier/sturdier than expected. It is heavy, with a super strong magnet close on the door. The mailbox flag is just as solid as the rest of the mailbox. The house numbers are magnetic. This post-mount mailbox is awesome and a great addition to our home as we continue to make mid-century updates.” - Ryan B. 
  
• “This modern mailbox is eye-candy, it really makes our front pop even our mailman loves it!” - Adrianne D. 
  
• “The extra-large mailbox looks great, but it is also super sturdy and seems to be made of quality materials. Installing it was a breeze, took about 30 minutes. I threw on some music as I dug out the old mailbox, and less than 10 Post Malone songs later, I was looking at a newly installed Malone post-mount mailbox. Fire for real, though. Our home is looking more updated and modern just by having this in the front. I never realized how much of an eyesore the old mailbox was. 10/10 recommend!” - Seth
  
• “We had a very sad mailbox, and I’m still doing the happy dance with the arrival of this mailbox. It is so well designed and perfectly contemporary for our house. Its clean lines and soft brown color are such a refreshing change from black mailboxes. It's amazing, extra-large, roomy, and exceptionally handsome.” - Amanda.
  

Explore The Malone modern mailbox by Post & Porch now →