Best Plastic Security Mailboxes in 2026

Large capacity fits larger boxes, padded envelopes, and magazines laid flat

Rust-proof plastic construction is highly durable providing strength and stability

Wide opening allows easily delivery of packages

Your purchase includes One Mail Boss Package Master Curbside Locking Security Mailbox in Granite + Installation hardware | Mount post not included

Mail Box dimensions – 21.5" D x 12" W x 16.5" H | Weight – 53 lbs. | Packages – 10.5” L x 3.5” – 4.5” W x 3.5” – 4.5” H | Refer to product pictures for more dimensions

Stainless steel hinges and powder-coated finish for optimum weather resistance

USPS Approved Oasis 360 Locking Mailbox is 11.3 in. W x 11.5 in. H x 20 in. D

Accepts parcels 9.5 in. W x 12.6 in. L x 1.5 in. H to 9.5 in. W x 3.5 in. L x 2.5 in. H

Dual door locking parcel mailbox, two doors for easy access

Convenient newspaper holder keeps papers clean and dry

Front and rear access to interior compartments

Includes address numbers, mounting hardware, and post cover

LARGE CAPACITY: Jssmst mail box can hold magazine and large envelopes, it is able to hold days worth of mail at a time

EXTERIOR DIMENTIONS: 12.6 x 8.46 x 3.35 Inch; INSIDE STORAGE AREA MEASURES: 12.4 x 8.3 x 3.05 Inch

SECURITY WITH KEY LOCK: Jssmst mailbox includes key lock with 2 keys for security against theft

CONVENIENT AND SECURE DROPBOX: This wall-mount mailbox duty holds various mailings, paperwork, newspapers, magazines, small parcels, packages, post office deliveries. It provides the perfect solution for convenient and secure, dropbox applications

WEATHERPROOF: Outdoor mountable mailboxes are made with high quality galvanized steel magnetic cover, black powder coated that locked mails from heavy rain and deliberate theft.

RESIDENTIAL OR OFFICE USE: Aesthetic posts, mounts vertical mailbox stylish look adds modern touch to exterior decor, front door house, commercial or business, classic rural and modern apartment. In terms of its locking security, mailbox has secure key lock with two reserved key locks that is not easy to duplicate.

Large Capacity: The lockable wallmount mailbox duty are holding multi mailings, group mail, paperwork, newspaper, magazines, small parcel, package, and post office deliveries; This measures (15.0 x 15.7 x 4.8) Inches (W x D x H), Model Number - SLMAB06

WeatherProof: Outdoor mountable mailboxes are made with high quality galvanized steel magnetic cover, black powder coated that locked mails from heavy rain and deliberate theft

Residential Or Office Use : Aesthetic posts, mounts vertical mailbox stylish look adds modern touch to exterior decor, front door house, commercial or business, classic rural and modern apartment; In terms of its locking security, mailbox has Secure key lock with two reserved key locks that is not easy to duplicate

HIGH-QUALITY&DURABLE: The wall-mount mailbox is made of strong galvanized steel, will use for a long service lifespan; the painted finish is special outdoor powder coating for weather resistance

LARGE CAPACITY: Mail box fits hold multiple letters, magazines, newspapers; waiting for that import post? The 3 transparent viewing windows will tell you the answer; look the newspaper holder at the bottom is also a good option

A LITTLE UPGRADE, A BIG PROGRESS: Different from ordinary mailbox lock, the LANDVOI lock is more durable and safer, the added rotatable cover ensures the long-lasting service of this lock;the black silicone pad can effectively reduce the noise when the lid is closed;and the black nylon spacer between wall and mailbox to avoid it scratching the wall

SECURE AFTER HOUR DROP: This mountable mailbox provides convenience and security for night drops, key drops, payment drops, interoffice mail and much more. It has a secure key locking feature with two reserved lock keys not easy to duplicate

LARGE CAPACITY: Large enough to hold multi mailings, group mail, paperwork, newspaper, magazines, small parcel, package, post office deliveries. It measures 9.0’’ x 3.3’’ x 12.5’’ (L x W x H) and features a universal mount to any wall or flat surface

DURABLE WEATHERPROOF CONSTRUCTION: The outdoor indoor wall mounted mailbox is made with high quality galvanized steel magnetic cover and white powder coated finish that locked mails from heavy rain and deliberate theft

HIGH-QUALITY, DURABLE: Mailbox is made of steel plate material, strong and durable, thick wear resistance, paint surface is antirust elements, prevent scratches, is a practical article, can be used for many years.

CONVENIENT DELIVERY &SAFE USE:Mailbox with delivery port, easy to store, without opening can be quickly collected. There is a handle on the edge of the delivery mouth to facilitate your delivery.

APPROPRIATE CAPACITY: Mail box fits hold multiple letters, newspapers, emails, etc.,including rolled magazines . Size: 12”X4.17”X13.46”/14.96”

DURABLE AND SUSTAINABLE : Mailboxes has ample space for various types of mail, including rolled magazines. Collects and holds mail from a mail slot. Fits on all horizontal mail slots.

STURDY : Mailbox be crafted with quality nylon, steel for strength and durability.

SAFE ：Keeps Your Mail Safe and Secure. Eliminates Your Mail Falling on the Floor. Standing nylon baffle, this is designed to prevent from fishing or stealing private property.

[Wall Mount Mail Box]: 15 9/16"x12"x3 3/4" Large Wall Mount Mail Box with slim size for taking up less space, features outward opening door for taking out your mails conveniently; Large inner compartment to store letters, newspaper and magazines

[Durable Construction]: Made of solid steel with powder coating finish, corrosion-resistant, anti-rust and weather-proof, suitable for outdoor & indoor use

[Lockable & Safe]: Comes with lock and 2 keys for providing anti-theft protection & added security, ensuring that your sensitive mails are safely held at your doorstep

QUALITY: The mailbox is classic and rust-proof, which is made of cast aluminum

SECURITY: Innovative baffle door accepts letters, small parcels magazines newspapers and also deters fishing

CAPACITY: This type of mailbox has a large box that can hold about 5 days of mail and magazines. The total height of the Cast Aluminum Mailbox is 46.06 inches, weight 18.3 pounds

ADDRESS NUMBERS SHIPPED SEPERATELY: Up to five 2-Inch solid brass or reflective gold address numbers are included with your purchase. Once you purchase the Oak Mailbox and Post System from Addresses of Distinction message us with your order number, your choice of brass or reflective gold, and up to 5 numbers. We will send two sets of your street numbers to place on both sides of your address plate. Our numbers are self-adhesive, so it will be simple to apply to your address plaque.

TRADITIONAL MAILBOX AND POST SYSTEM: The Oak System features a traditional American Eagle embossed on the front door. All components of this system feature a smooth rust resistant black finish. The metal mailbox measures 18.75" Long x 8.75" Tall x 6.25" Wide and sits atop the strong 6-foot tall post.

SINGLE PIECE POST FOR STURDY CONSTRUCTION: The Oak Post and Mailbox is cast from 100% rust free, powder coated ¼” aluminum. Our posts feature a strong single-piece construction that is placed 18-28 inches into the ground. Similar systems have 1/8”multi-piece posts which can weaken and bend over time. Our mailbox system will stand up to heavy winds, rains, blizzards, and storms. The Oak will serve as a beautiful introduction to your home for years to come.

Padlocks, Lockout/Tagout & Security Equipment

Country of manufacture: United States

Manufacturer: SALSBURY INDUSTRIES

HIGH QUALITY: Ydocabinit(Yoocabinet) wall-mounted mailboxes compared to similar mailboxes on the market, our mailboxes are much thicker and stronger galvanized steel plate and with environmental professional outdoor powder-coated, which can effectively prevent rust, scratch-resistant and will not fade. This mailbox will provide long-lasting strength and use throughout the years.

LARGE CAPACITY: the size of mailbox is 15.7"x15.7"x4.3" inch, Ydocabinit(Yoocabinet) mail box can hold letters, magazines and large envelopes, or to hold several days of mail at a time.Also a newspaper holder at the bottom of the mailbox.

SAFE LOCK: Our wall mount mailbox with sturdy key lock for security, it can prevent mails theft.

High security locking curbside mailbox and post made of steel and powder coated to resist tough weather

Convenient Outgoing tray is also an internal baffle to help keep unwanted hands from reaching into the mail storage area

This large capacity mailbox accepts larger pieces of mail and small packages

HIGH QUALITY: Mailboxes are made of aluminum for strength and durability, which can effectively prevent rust（theoretically never rusts), and environmental professional outdoor powder coated, which can scratch-resistant and will not fade. This mailbox will provide long-lasting strength and use throughout the years.

LARGE CAPACITY: the size of mailbox is 15.35 "x 16.14 "x3.54" inch, Yoocabinet mail box can hold letters, magazines and large envelopes, or to hold several days of mail at a time.

SAFE LOCK: Our wall mount mailbox with sturdy key lock for security, it can prevent mails theft.

LARGE CAPACITY: Wall mount mailbox lock with window,size of mailbox is 14” x 12” x 4.1”, drop slot 13.4”x1.1” this big letter box can hold plenty: bulk mails, padded envelopes, paperwork, newspapers, magazines, small parcels, packages and post office delivery.

PRIVATE LOCKABLE WITH LOCK: For locking security, mailbox has secure key lock with 2 reserved key locks, protects mails from deliberate theft.

WEATHERPROOF: Mail box with high quality stainless steel magnetic cover, 99.9% waterproof structure that prevents rain from entering.

DURALINE EXTRA LARGE CAPACITY MAILBOX - Our xl mailbox measures 10"x 12"x 20", providing sufficient space for packages and mail and ensuring all the items remain organized. It complies with postal standards, removing the need to worry about legal issues.

ULTRA-DURABLE - Made from ultra-thick puck board plastic, it is weatherproof and will survive the roughest storms, winds, and snow. The extra large rural mailbox also features stainless steel hinges and fasteners, ensuring reliable operation.

EASY TO INSTALL - These large mailboxes for outside come with clear instructions, making the entire process hassle-free. Hang it up or screw it onto the post. The installation will only take minimal time and effort, preventing frustration and exhaustion.

Cast Aluminum powder coated will not rust and is scratch resistant

Decorative fluted base

Ball finial mounts to top of post

Single post with Lewiston mailbox, square base and pineapple finial

Add our Lewiston Locking Mailbox Conversion Kit for added security Amazon # B01KSELS4O

Protective, weather-resistant Bronze powder coated finish. Made from solid cast aluminum and steel 

Black steel wall mount mailboxes with Lock

Lock with 2keys

Flip waterproof and dustproof

Decorative mailbox only (no address plates)

Mailbox is post mount and made of rust-free cast aluminum with a tough powder coat weather resistant finish

Dimensions. 10' high, 8" wide 20 " deep weighs 13 lbs

★SECURITY: This post box formed from corrosion-resistant solid wood, the letterbox is the ideal way to store your post safely and securely under all weather conditions.

★LARGE SIZE: The large size is ample enough for all your family's post and can accept letters, packet parcels, catalogues etc.

★ DECOR: Your postbox is a part of your house, so it must exude a good impression.

★SECURITY: This post box formed from corrosion-resistant solid wood, the letterbox is the ideal way to store your post safely and securely under all weather conditions.

★LARGE SIZE: The large size is ample enough for all your family's post and can accept letters, packet parcels, catalogues etc.

★ DECOR: Your postbox is a part of your house, so it must exude a good impression.

★SECURITY: This post box formed from corrosion-resistant solid wood, the letterbox is the ideal way to store your post safely and securely under all weather conditions.

★LARGE SIZE: The large size is ample enough for all your family's post and can accept letters, packet parcels, catalogues etc.

★MODERN DECOR: Your postbox is a part of your house, so it must exude a good impression.

★Numerous Uses -Use for Residential Commercial.It Adds a Touch to Facade Outside, Front Porch.

★Front Door of Your Home or Business; Classic for Rural and Houses.

★Privacy protection-Use as a Mail Collection Box for All Incoming and Outgoing Mailto Help Keep Private Interoffice Correspondence Confidential.

Large Capacity - Measured 27 x 12 x 38 cm/10.6 x 4.7 x 14.9 inch, big to hold various mailings, bulk mails, padded envelopes, paperwork, newspapers, magazines, box mails, post office delivery.

Multiple uses - Use as a mail collection box for all incoming and outgoing office mailto help keep private interoffice correspondence confidential.

Secure Design - With keys to lock in, keep your letter safe, reduces the risk of mail being removed without a key, security against theft, that items dropped inside are safe and secure.

★Exclusive luxury lockable design: elegant style and timeless beautiful design wall-mounted mailbox, mailbox, powder coated surface mailbox, giving this , refined and high-end look.

★It is easy for the postman to insert your letters and parcels. Mailbox letter storage box with proper aperture size and enough space

★This post box with lock comes with 2 keys. mailbox will keep your private letters secure from theft and vandalism. Also protects your mails from getting chewed by dogs or cats.