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Post Mount | Large

$234.99 $184.99

Adoorn’s lockable, weatherproof Post Mount mailboxes are for people who receive mail delivery at the street/driveway.

Select Color: Black(Estimated to ship March 15, 2024)

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Post Mount in real life

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Secure + protect your valuable mail

Prevent identity theft, mail theft, and package theft with adoorn’s locking mailboxes. They’re easily accessed by your mail carriers and delivery drivers yet keep out unwanted weather and sticky fingers.

Secure + protect your valuable mail

Put a smile on the face of your home

Designed to look great, every adoorn mailbox comes in a range of eye-catching colors that add flair to an otherwise overlooked aspect of your home’s exterior.

Put a smile on the face of your home

post mount | how we compare

Post Mount | Smalladoorn
Post Mount | Largeadoorn
Secure Lock Prevents Theft
Reinforced Weatherproof Sealing
Meets USPS StandardsHas outgoing mail flag, meets size specs, passes weather-resistance testing and functionality testing
Multiple Color Options
Receives What Type of Mail

Receives mail + polybag style packages

Receives mail + polybag style packages

Receives mail + polybag style packages

Holds How Many Days of Mail

2-3 Days of mail

7-14 Days of mail

1 day of mail

External Size Dimensions

12" H x 12" W x 18.5" D

15.5" H x 12" W x 18.5" D

8.8" H x 7" W x 19" D

Max Package Size

Receives packages: 16" x 10" x 2"

Receives packages: 16" x 10" x 2.5"

Receives packages: 19" x 6.75" x 4"

post mount features & specs

Anti-Pry Lock & Key
Anti-Pry Lock & Key
Anti-pry latch lock mechanism deters leveraged entry and anti-fishing panel keeps sticky-fingers out and delivered items safe inside. Outdoor-rated, commercial grade lock. Includes 2 keys.
Large Capacity
Large Capacity
Sized to receive mail, envelopes & poly-bag style packages up to 16” x 10” x 2” while preventing theft. Post Mount | Small holds 2-3 days of mail. Post Mount | Large holds 7-10 days of mail
Conceal Outgoing Mail
Conceal Outgoing Mail
Includes outgoing mail flag & concealed outgoing mail clip for added protection.
Weatherproof + Built to Last
Weatherproof + Built to Last
Heavy-duty galvanized steel construction, stainless steel hinges and rust & scratch resistant powder coat finish. Internal weatherproof stripping & sealing magnets keep out rain and snow.
Fully Assembled + Easy Mount
Fully Assembled + Easy Mount
Ships fully assembled with hardware needed for quick & easy mounting to posts.
Post Mount | Small External Dimensions: 12" H x 12" W x 18.5" D. Post Mount | Large External Dimensions: 15.5" H x 12" W x 18.5" D
Meets USPS Requirements
Meets USPS Requirements
Engineered in accordance with all US Postal Service requirements for post mount locking mailboxes.

people are asking

Should I buy a small or large size post mount mailbox?

The Post Mount | Small holds 2-3 days of mail & is 12" H x 12" L x 18.5" D.

The Post Mount | Large holds 7-14 days of mail & is 15.5" H x 12" x 18.5" D.

The Small size works great for people who do not let their mail sit in their mailbox for more than a couple days at a time. If you are ever away from home for a few days or like to take vacations, then you'll love the additional capacity that the Large size provides.

Why Locking? Do I really need it?

Recent research says 75% of people in the USA have had mail or package stolen in the last year (119M packages---that's a crazy number) & it is increasing every year.

adoorn mailboxes are designed to protect against identity, mail & package theft. Theft is such a problem that the US Postal Service now has standards for locking mailboxes (which we adhere to of course!).

How does it work?

It works like the big blue USPS boxes.

  1. Mail person simply opens the top door and places mail inside.
  2. When the door shuts, mail falls into the secure location.
  3. Retrieve your mail by using your key at your convenience.

Does this mailbox meet USPS requirements?

Yes! Our mailboxes abide by and follow all USPS regulations. Our installation instructions include guidelines for height and set back requirements at your curb. And, you can also include delivery instructions for deliveries to be placed in your mailbox.

What is the maximum size package that can fit in the mailbox?

The adoorn post mount mailboxes can receive mail, envelopes, polybag style packages and small rigid packages. The largest size rigid package that can fit inside the top opening is 16” x 10” x 2”.

If you're looking for a solution to receive package deliveries too, we recommend bundling a post mount mailbox with one of our Package Boxes.

How do I install the post mount mailbox?

It’s simple! For ease of installation and a guaranteed fit, we recommend purchasing one of our adoorn posts. Our post mount mailboxes can be installed into an adoorn post or most standard metal or wood mailbox posts. Installation hardware and easy-to-follow instructions come with the product. Our instructions include guidelines for height and set back requirements at your curb, but please contact your local post office if you have any questions!

Can I get a replacement key if I lose mine?

Each mailbox comes with 2 keys. And, each lock has a unique identification code to your specific mailbox. If you do lose your keys (we're sure you won't!), just send us an email to hello@adoorn.com to order replacements that match your lock's identification code.

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New York Post
USA Today

why choose adoorn

Receive Mail & Packages

Receive Mail & Packages

Large capacity design, allows for delivery of mail & packages.

Protect your Deliveries

Protect your Deliveries

Our locking mailboxes keep your valuable mail safe



Keep your mail + packages dry from rain + snow

Built to Last

Built to Last

Rustproof, heavy-duty steel construction so your box lasts for years to come

Package Box | Small

Need to protect your packages?

Bundle your Post Mount mailbox + our Package Box.

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Wall Mount | Small

Do you get mail delivered to your door?

If you get mail delivered to your door / porch vs your street/driveway, you need a Wall Mount mailbox. Shop them here.

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