Best Locking Mailbox USPS

14 Most Reliable Locking Mailbox Options for USPS [2023]

Keep your mail safe with the best locking mailbox. We review the top 14 mailboxes in 2023 from major brands and USPS approved, plus buying tips.

These days, it seems like you can’t go anywhere without running into the term “identity theft.” As the fastest growing crime in the world, you will probably become a victim to it at some point in your life. And one of the easiest and most efficient ways for thieves to access your personal information is through the mail.

Although bills and junk mail may seem innocuous to you, they can contain vital data that can threaten your identity. Fortunately, with the best locking mailbox, you can stop thieves in their tracks. Not only will these units protect your information, but you won’t have to worry about packages and other valuables getting stolen as well.

If you’re concerned about the safety and security of your mail, then you want to get one of these USPS-approved locking mailboxes as soon as possible. Don’t wait until you become a victim. Be proactive and give yourself peace of mind. Let’s see what these products can do for you.

Best Locking Mailbox USPS

What is a Locking Mailbox? 

A locking mailbox that is in a residential or commercial setting must be approved by the USPS. A lockable mailbox is easy to use and a mail carrier just simply deposits the mail in the incoming mail slot and in some cases it can be the main door.

If a commercial business or building has a locking mailbox they have to ensure that their incoming mail slot or door is designed so that individuals cannot put their hand down the slot and steal mail. Another fact about locking mailboxes is that postal carriers do not have a key to gain access to the mailbox lock, they must use the available slot or door.

Comparison Table – Locking Mailbox Options for USPS [2023]

(click to read review)
Architectural Mailboxes 6300RZ Oasis 360 Locking Parcel Mailbox$MediumHouseAluminum, SteelSmallPost Mount
Architectural Mailboxes 6900B Elephantrunk Parcel Drop Box$$LargeHouseAluminum, SteelLargeGround
Architectural Mailboxes 6200B-10 Security Mailbox$MediumHouseSteelSmallPost Mount
Mail Boss 7161 Metro Locking Security Wall Mount Mailbox$Extra SmallTownhouseSteelNoneWall Mount
Mail Boss 7526 Mail Manager Street Safe Locking Security Mailbox$$SmallHouseSteelSmallPost Mount
Mail Boss Curbside, Wood Grain 7510 Mail Manager Locking Security Mailbox$$MediumHouseSteelSmallPost Mount
Mail Boss 7412 High Security Steel Locking Wall Mounted Mailbox$Extra SmallOfficeSteelNoneWall Mount
Mail Boss 7172 Townhouse, Vertical Wall Mount Security Mailbox$$SmallTownhouseSteelNoneWall Mount
Mail Boss 7506 Mail Manager Mailbox$MediumHouseSteelSmallPost Mount
Mail Boss 7205 Package Master$$MediumHouseSteelSmallPost Mount
Mail Boss 7106 Curbside Locking Mailbox$$MediumHouseSteelSmallPost Mount
dVault Full Service Vault DVCS0015 Secure Curbside Mailbox$$$LargeHouseSteelLargeGround
Gibraltar Mailsafe Medium Capacity Wall Mount Lockable Mailbox$SmallTownhouseAluminumNoneWall Mount
Salsbury Industries Aluminum 3504ASU Surface Mounted Vertical Lockable Mailbox$$$Small (4 boxes)CommercialAluminumSmallWall Mount

How to Choose the Best Security Mailbox?


Size of Your Mail: Before you worry about anything else, it’s imperative that you make sure that your locking mailbox will be able to hold everything that it should. If you buy a lot of items online, then you want to have a model that can fit all of your deliveries with ease. Otherwise, they will be left out for thieves, which kind of defeats the purpose of having a locking mailbox in the first place.

Size of Your Yard/Front: The other thing to consider with regards to size is how well it will fit in your current setup. For example, if you have to mount it to a mailbox column, will it work? Similarly, if you use a wooden post, will it be too bulky or heavy? Or do you have a townhouse with just a wall to mount your secure mailbox onto? Thus, you want to check the dimensions and do some measurements before you pull the trigger on any of these models. Taking the time to do this will ensure that you don’t have to take it back after the fact.


Since security is the priority with these products, you have to be sure that it can repel any theft attempts. For the best results, we highly recommend galvanized or stainless steel. This material will not only hold up better against break-ins, but it will resist weather and water damage as well. Other options for these products include plastic or aluminum. These are ideal if you’re not as concerned with security since they can be broken into more easily. The other benefit of choosing a material like plastic is that it’s lighter and easier to install, and it won’t rust or degrade as quickly over time. Even treated galvanized steel will start to rust after a few years, but plastic will always stay in prime condition.

Door Mechanism

As we’ve seen on this list, baffle doors are by far the best choice when trying to protect your mail. The reason that these are ideal is that they prevent anyone from reaching in to grab your content. The downside, however, is that the shape of the door can be limiting, especially when trying to receive packages. Outgoing mail can also be an issue with baffle doors. In most cases, you will have a clip where you can keep the mail stored inside, but you will have limited space. Alternatively, you can get a model that has two separate compartments for your mail. As long as the outgoing stuff is concealed, it should be safe from most prying eyes.

Rear Access

Although this is not a feature that comes with a lot of locking mailboxes, it can be quite handy in some situations. With these units, you can unlock the box from the back, which provides a couple of benefits. First, you can have more room to pull your contents out, since you don’t have to worry about the baffle or front door mechanism. Secondly, it allows you to access your mail more conveniently, as well as do so without drawing attention to the fact. For example, if you have a fence surrounding your house, having rear access can make your life so much easier. Rather than having to go out through the gate and come back, you can pull your mail out and be on your way.

Reviews: 14 Best Locking Mailboxes 2022

Architectural Mailboxes 6300RZ Oasis 360 Locking Parcel Mailbox

Architectural Mailboxes 6300RZ Oasis 360 Locking Parcel Mailbox – Check Price on Amazon

This locking mailbox was made with security and functionality in mind. It boasts a large storage space that can hold parcels and mail bundles with ease. The box is made of aluminum covered with a coat of steel which provides a combination of light weight and durability. Since aluminum is one of the lightest metals used in industry, you will find it easier to install and carry the mailbox around.

Speaking of security, this metal offers a much better protection than plastic and wood. However, if you live in an unsafe neighborhood with many skilled burglars wandering the streets, you are better off buying a locking mailbox made completely of steel. Aluminum may not resist powerful break-in tools even if it’s powdered with steel.

If you’re looking for a secure mailbox with enhanced weather resistance, this one is perfect for you. The entrances are fully sealed, keeping the mail inside safe from moisture and wind. A great feature of this secure mailbox is the two-door access. Simply put, there is a front door for the postal carrier and the rear door for you to retrieve the mail without going out on the street. The box also has a steel flag on the side which you can conveniently use to tell the postal carrier of an outgoing mail in the box.

Installing this mailbox is a breeze, as it comes already drilled. You just have to mount the hardware and secure the box to the mail pole or home wall.

Speaking of drawbacks, the aluminum structure is weaker than steel and is easier to be destroyed by heavy burglar tools. Also, it may be difficult to find replacement keys for this model. Do your best not to lose track of the 4 keys that come with this mailbox.


  • Much storage
  • Sturdy structure
  • Anti-corrosion stainless steel coating
  • Lightweight
  • Comes already drilled for easy installation
  • Straightforward key system (without confusing combinations)


  • Less resistant than steel to burglary
  • Inability to get replacement keys

Architectural Mailboxes 6900B Elephantrunk Parcel Drop Box

Architectural Mailboxes 6900B Elephantrunk Parcel Drop Box – Check Price on Amazon

If you’ve been looking for a product that will make your online shopping is easier this may be the product for you. You’ve probably been concerned at some point or another about having your packages stolen.

With this dropbox, that concern is no longer an issue as instead of just leaving multiple packages at your door they now can just deliver them in this dropbox. The fact that you can bolt it into the ground to make it secure helps your peace of mind a lot. After trying this product you’ll think that this should become something of the norm in every household so no one has to worry about their packages being stolen.

The ability to also use this for outgoing returns for packages is amazing too. That probably is something you didn’t even get this for or thought about if you’ve purchased this. This product may cost a little bit more than others like it but it will be worth the money after getting great value out of it.

If there is a downside to this the only downside would be the bolting to the ground. You might have a little bit of an issue with it if you’re not used to using tools but it’s not too hard. So overall this will easily be a must-have product for you that you never knew you needed until now.


  • Helps safely secure and store packages
  • Has a lot of space to store multiple packages
  • can be securely bolted into ground
  • simple key and lock system rather than combination lock
  • The ability to use it for returns


  • Could be easier to bolt into a surface.

Architectural Mailboxes 6200B-10 Security Mailbox

Architectural Mailboxes 6200B-10 Security Mailbox – Check Price on Amazon

These days, ordering packages online has become second nature. Unfortunately, thieves know this, and they take advantage of unattended boxes that are sitting on your doorstep. With most locking mailboxes, the door is too small to accept these items, which means that all of your online orders can be at risk. Thankfully, the Oasis Mailbox from Architectural Mailboxes is the perfect accessory for your home. It’s larger design allows you to accept most small to medium-sized packages without risking the safety and security of their contents.

Once again, protecting your mail is a baffle door that ensures that no one can reach inside and grab anything. The baffle is spacious to allow for boxes as well as letters, so you won’t miss anything that gets delivered (unless it’s massive). The construction of this box is superb, with galvanized steel components and a weather-resistant design.

To make things even better for you and your mail, this model also comes with rubber gaskets on the sides to ensure that water doesn’t leak in by accident. If you live in a rainy climate, this box is a must. Protecting your contents is a thick locking mechanism that won’t pry open easily. No lock is 100% secure, but this one will prevent all but the most ardent thieves from breaking in.

Other features that you can expect from the Oasis include a built-in mail flag to let you know when the mailman has stopped by, easy mounting instructions that allow you to get your box up and ready to go in no time, and two keys so that you always have access to your packages. Also, as with most locking mailboxes, this unit comes with a limited lifetime warranty against defects or damage.


  • Larger design can accept parcels and letters
  • Durable galvanized steel construction
  • Corrosion-resistant materials
  • Built-in mail flag
  • Pre-drilled holes for easier installation
  • Can be mounted to pole or column
  • Weather-resistant design


  • Keys can be difficult to replace
  • Baffle may not prevent all fishing attempts

Mail Boss 7161 Metro Locking Security Wall Mount Mailbox

Mail Boss 7161 Metro Locking Security Wall Mount Mailbox – Check Price on Amazon

Security has been the top priority in the creation of this ultra-durable locking mailbox. The box’s thick walls made of galvanized steel are the worst nightmare of any mail thief. The latch lock denies any prying attempt, keeping the box’s contents safe.

The laser cut keys have hundreds of possible combinations. This prevents an event in which a thief manages to replicate the cut pattern and open the door. Another highly effective security mechanism is the wafer lock that impedes box drilling and forced door opening.

If you are mostly concerned about the storage space, no need to worry, you’ve got a lot of it. Envelopes and parcels will easily fit inside, even if you don’t retrieve your mail for weeks. If you live in an area with bad weather, rest assured this secure mailbox will protect your mail from rain, snow and strong winds.

Galvanized steel has anti-corrosive properties, as well as the stainless steel from which the hinges are made. This protects the entire structure from rust making it last for longer. Speaking of installation, it shouldn’t give you much headache. The mounting process is pretty straightforward and easy. You just drill some holes in the mailbox and wall, and secure the bolts. Lastly, it’s important to mention the eye-catching granite design of this lockable mailbox. It can become a great decoration on the main entrance, especially if the entry door is gray or granite.

As for downsides, you may find this mailbox too heavy, which makes it difficult to hold and carry it. Make sure to get a helper to assist you during the installation. Another drawback is the inability to find replacement keys in case you lose all three keys.


  • Heavy-duty steel structure
  • Laser cut key system
  • Theft-proof locking latch
  • Large capacity
  • Moisture-proof interior
  • Corrosion resistance
  • Hassle-free installation
  • Appealing granite design


  • Given heavy weight, requires two people to carry out installation
  • Difficult to make duplicate keys

Mail Boss 7526 Mail Manager Street Safe Locking Security Mailbox

Mail Boss 7526 Mail Manager Street Safe Locking Security Mailbox – Check Price on Amazon

Being made of sturdy alloy steel, this locking mailbox offers supreme protection against vandals. Aside from the heavy-duty structure, the security is enhanced by the anti-theft latch and baffle door that deter fishing and prying. The baffle door allows for large parcels and mail bundles to be easily fitted into the box. You will be also happy to see a rear door that guarantees the convenient retrieval of mail without having to leave your front yard.

If you live in a dangerous neighborhood, this secure mailbox is sure to protect your valuables from ill-intended folks. The hardened anti-pick wafer lock makes drilling impossible, discouraging even the most experienced burglars from taking action. The box’s walls are made of galvanized steel while the hinges are constructed from stainless steel. Both varieties are resistant to shocks and prevent corrosion. So, if rain is commonplace in your area, this lockable mailbox is definitely an option to go for.

While it’s not made for large parcels, the box has a pretty roomy storage compartment. It could hold incoming mail for a couple of weeks. Given the high security of this box, you could even use it to drop off keys and money for a family member to pick up later. It may sound risky but you can trust the highly effective anti-theft mechanisms built into this mailbox. There is no way someone can reach inside and steal your assets.

Since it weighs 23 pounds, you may find it hard to install this locking mailbox on your own. Ask a family member to help you install it on the post properly. In addition, the large number of security mechanisms integrated into the mailbox may be both an advantage and disadvantage. The disadvantage is that you will have to spend more time and effort on maintenance and repairs.


  • Large storage capacity
  • Alloy steel structure resistant to shocks
  • Protection against corrosion and water damage
  • Anti-pry latch
  • Fishing-deterrent baffle door
  • Dual access
  • Drill-proof wafer lock


  • Heavy weight
  • More demanding in terms of maintenance

Mail Boss Curbside, Wood Grain 7510 Mail Manager Locking Security Mailbox

Mail Boss Curbside, Wood Grain 7510 Mail Manager Locking Security Mailbox – Check Price on Amazon

This lockable mailbox caters to both outgoing and incoming mail, making sure they are safe until they are picked up. If you send a lot of mail, this box is your perfect match.

The concealed outgoing mail clip secures the papers until they are retrieved by the mail carrier. Also, there is a small space in the front of the mailbox where outgoing mail is sheltered from rain, snow and wind. There is a larger storage space for incoming mails though. It is made to prevent the mailbox from getting filled up to the brim when you are out on a business trip or vacation. If it gets full, your mail will be left outside and expose yourself to identity theft as well as weather damage.

One of strongest points of this locking mailbox is its high level of security. It is made of galvanized steel that puts up great resistance to any vandal’s tool. Moreover, the box prides itself on a heavy-duty latch lock that impedes prying, and a wafer lock that deters drilling. The laser cut keys are easy to use and hard to replicate. This prevents thieves from finding an easy way to open the door.

Another well-known enemy of mailboxes is bad weather. You want your valuables to stay dry and not be covered by dust and other outdoor pollutants. Fortunately, this Mail Boss box is safely sealed with rubber from all sides to make sure not a single drop of water or speck of dust gets inside. If you’re looking for a mailbox with a beautiful design, this one is for you. Unlike most mailboxes that come black or gray, it boasts an attractive wood grain finish on the front side.

Speaking of disadvantages, the outgoing mail clip may be too small for securing a large amount of mail. If you send 5 or less letters per week, it shouldn’t be a problem for you. Other downsides include heavy weight and increased maintenance requirements.


  • Galvanized steel structure
  • Attractive wood grain design
  • Sturdy anti-prying latch lock
  • Laser cut keys
  • Concealed outgoing mail clip
  • Fully sealed to keep the mails dry


  • Heavy weight
  • Difficult to make duplicate keys
  • Outgoing mail clip may be too small to secure lots of mails

Mail Boss 7412 High Security Steel Locking Wall Mounted Mailbox

Mail Boss 7412 High Security Steel Locking Wall Mounted Mailbox – Check Price on Amazon

This compact lockable mailbox can be conveniently used for interoffice mail, payment drops, and other valuables drops. It is mostly used indoors and aims to encourage social distance. But if you expect to receive parcels and lots of mail, skip this one.

Since thieves act everywhere, the box has a galvanized steel structure that protects it from burglars. Moreover, it boasts a latch lock that minimizes the risk of prying and a wafer lock that is impossible to pick. If you know there are people around who like to fish into mailboxes, buy this Mail Boss unit. Its bin door design makes fishing impossible, thus keeping your assets safe.

This locking mailbox is not as large as outdoor mailboxes, yet it can fit a decent amount of valuables. If you need a box just to drop payments, rather than piles of mail bundles, then the Mail Boss Locking Security 7412 is for you. Since it is small and compact, it doesn’t take up much space. It will be pretty easy to find a place for it, even if you have a small office. Weighing just 11 pounds, this box is easy to carry around and mount on the wall without anyone else’s help.

Speaking of installation, it’s as easy as ABC. However, if you don’t really get how to use the hardware, consult the instruction manual.

This secure mailbox is available is a wide variety of colors, including white, blue, orange, pink, black with wood grain finish, and more. While you can choose a neutral color, like gray or white, that doesn’t stand out, you can also go for a fancy color. Aside from its functional role, a pink or a red mailbox will act as an eye-catching decoration that will add vibrancy to your office design.

Let’s move on to drawbacks. Probably the main disadvantage of this locking mailbox is its small size which doesn’t allow it to fit bulky correspondences. But if you use it to drop small valuables, you won’t have to complain about insufficient storage space. Also, the mailbox uses laser cut keys. If you lose all 3 keys, you may fail to find replacement ones. It means you will have to replace the whole key system, which comes at a hefty cost.


  • Anti-fishing bin-styled door
  • Sturdy latch that prevents forcing the door open by prying
  • Perfect for storing interoffice correspondence
  • Takes up little space
  • Easy to mount on the wall
  • Available in a wide selection of colors
  • Attractive office accessory


  • Internal storage may be not enough
  • Inability to get hold of replacement keys

Mail Boss 7172 Townhouse, Vertical Wall Mount Security Mailbox

Mail Boss 7172 Townhouse, Vertical Wall Mount Security Mailbox – Check Price on Amazon

Fully secured from theft and highly functionable, this small townhouse locking mailbox is here to satisfy all your small mail storage needs. The whole structure is made of durable galvanized steel that protects the box contents from vandals and keeps corrosion at bay. It also keeps mail dry, preventing rain water from penetrating the box.

It can hold both incoming and outgoing mail. The outgoing mail clip safely secures the papers until the postal carrier picks them up. The collection slot allows easy mail drop-off, but it deters fishing. Even if you insert a fishing tool into the slot, you will find nothing there because the received mails are transferred into a storage compartment in the middle section of the box. Just like any Mail Boss mailbox, this one is equipped with state-of-the-art security mechanisms, such as anti-pry latch and wafer lock.

The secure mailbox doesn’t boast a considerable storage space. It can fit small books, mail bundles, money drops, magazines. If you intend to receive large parcels, skip this box and consider bigger ones. Given its small size, you will not have a hard time finding a place for it. It can be mounted both on the wall and on a mail post. You will receive a mounting bracket that will make the installation easier.

Keep in mind that this lockable mailbox is made for a small correspondence. The outgoing mail clip is not ready to hold mountains of envelopes. If you send a lot of outgoing mail on frequent basis, make sure to buy a bigger box with a larger clip. Although made of stainless steel, the hinges and other hardware may start to accumulate rust over time.


  • Advanced anti-theft features
  • Perfect for small mail budles
  • Outgoing mail clip that secures the sent mail
  • Industry-grade steel structure
  • Mounting bracket for easy installation


  • Too small outgoing mail clip
  • Some parts may start to rust over time
  • Little storage space

Mail Boss 7506 Mail Manager Mailbox

Mail Boss 7506 Mail Manager – Check Price on Amazon

When trying to find the best locking mailbox, one brand is synonymous with this kind of security. Mail Boss products are high-quality and built to last, so you can rest easy knowing that your mail is kept safe inside one of these units.

We’re going to see a lot of Mail Boss on this list, but let’s see what the Mail Manager has to offer. First of all, the construction of this box is top-notch. It’s made of galvanized welded steel, and it comes with a robust powder-coated finish. The coating is there to help prevent rust and weather damage, and it gives the whole thing a polished and beautiful appearance. Just because you’re securing your packages doesn’t mean that the device can’t look good in the process.

As far as security goes, the Mail Manager has a few critical features that ensure that thieves won’t be able to get inside. The door mechanism uses a baffle, which keeps the contents separated as you load mail into it. This feature is there to prevent fishing, which is when someone reaches into the box to access its contents. If you’re not familiar with how this works, it’s the same as on every USPS mailbox you can find. The other thing that keeps your mail secure is the anti-pry locking mechanism. It’s made of durable stainless steel and ensures that thieves won’t be able to pop the lock off with a crowbar or other similar device.

Although these locks can’t prevent access 100% of the time, it is a sufficient deterrent. Only the most hardcore thieves will be able to penetrate these defenses, and chances are that your mail is not worth the extra effort. When it comes to outgoing mail, this lockable mailbox comes with a clip so that you can keep it inside the baffle, rather than outside in plain view.

Since theft works both ways, having your outgoing letters and packages concealed adds another layer of protection and peace of mind. The only downside is that you have limited space in which to hold anything. Mail Boss is so confident in its products that the Mail Manager comes with a limited lifetime warranty against defects or pre-existing damage. To make mounting and installation easier for you, instructions are included with the box, as well as three keys.

Finally, this box comes in one of four colors, so you are sure to find one that fits the style and aesthetic of your home.

Check out our full review of the Mail Boss 7506 here.


  • USPS Approved
  • Durable galvanized welded steel construction
  • Sleek powder-coated finish
  • Four color options available
  • Built-in flag on the side
  • Concealed outgoing mail clip
  • Mounting instructions included
  • Rust resistant


  • Can be difficult to get key replacements
  • Outgoing mail clip is limited in size

Mail Boss 7205 Package Master

Mail Boss 7205 Package Master Curbside Locking Security Mailbox – Check Price on Amazon

Being engineered with your security in mind, this product comes as the best defense to prevent mail theft. It is a top-notch high-security residential locking mailbox designed to enhance the safe reception of small parcels and can store them in large quantities for weeks.

Therefore, there is nothing to worry about even while traveling away for a business trip or vacation. Whether you are looking for a secure mailbox for commercial or home use, this unit is a great choice, especially if you receive valuable goods such as prescription drugs by mail.

The mailbox comes with a fantastic Fast-Track mounting plate. So, installing it at your place, whether on a Mail Boss in-ground or surface mailbox post, becomes pretty easy and quick. This means you can do it all by yourself rather than hiring an expert.

Featuring a heavy-duty galvanized steel construction, this unit is unbreakable in case of vandalism. Besides, its strong powder-coated finish gives extra protection to the mailbox from harsh environmental conditions and other elements.

USPS certifies this extra-large mailbox carrying capacity and boasts a baffle door bin design equipped with patented mail shield technology. The large baffle door allows packages of all sizes to be dropped off with ease. Also, it provides you with ample space for your outgoing mail as well. Fishing is not an option with this door, so you can have peace of mind.

Other handy features this lockable mailbox comes with include the anti-pry latch lock for real theft protection, anti-drill safety, and address numbers for better visibility on your street. Also, it comes with three keys and a built-in mail flag for your convenience.

It comes in four colors, and with all Mail Boss products, this box has a limited lifetime warranty against defects.


  • Extra large capacity for packages
  • Corrosion-free stainless steel hinges
  • Durable galvanized steel construction
  • Four color options available
  • Easy to mount and install
  • Powder coated for weather resistance
  • Address numbers provided
  • Built-in mail flag
  • USPS approved


  • Paint on the exterior sheds off easily
  • Somewhat tricky to operate
  • Outgoing mail clip is limited in size

Mail Boss 7106 Curbside Locking Mailbox

Mail Boss 7106 Curbside Security Locking Mailbox – Check Price on Amazon

Securing your mail is serious business, but most curbside mailboxes have a bit of a disadvantage when it comes to outgoing materials. In most cases, you either have to clip the mail to the side of the box, or place it in the door and hope that it doesn’t get stolen.

The other issue is that you don’t have that much space to put anything, so if you have to send a package or a lot of envelopes, you are out of luck. With this secure mailbox from Mail Boss, however, these problems are minimized. Unlike the Mail Manager above, this unit has a separate slot for outgoing mail. Best of all, the incoming slot is still protected by a baffle door, so you don’t have to worry about fishing. If you send a lot of mail, this is the box to get.

As with all Mail Boss models, this one is made of high-quality materials. The hinges are stainless steel, and the sides are constructed of galvanized steel. A powder coating prevents rust and water damage and ensures that this box will last for years. Another excellent feature that comes with this model is the Fast-Trak mounting plate.

In many cases, you need an expert to help you get your mailbox secured properly, but that’s not an issue with this model. Using the plate, you should be able to get it up onto a pole or installed on a column in less time than you might think. If you want to add some practicality to this mailbox, it also comes with reflective address stickers.

This allows you to make it easier to spot for your mailman so that he or she doesn’t miss the box or deliver to the wrong house. Other features of this unit include three keys for your convenience, a built-in mail flag, and four different color options. Matching the style of your home has never been easier. Also, it comes with a limited lifetime warranty against defects.


  • Durable galvanized steel construction
  • Stainless steel hinges
  • Rust resistant design
  • Built-in mail flag
  • Fast-track mounting plate for easy installation
  • Four color options available
  • Reflective house number stickers included
  • Separate slots for outgoing and incoming mail


  • In rare cases, the keys may not work and have to be replaced
  • Hinges might be susceptible to rust over time

dVault Full Service Vault DVCS0015 Secure Curbside Mailbox

dVault Full Service Vault DVCS0015 Secure Curbside Mailbox – Check Price on Amazon

This bulky locking mailbox was engineered with security and user convenience in mind, and is designed with international mail in mind. If you are sending and receiving lots of mail from overseas, this is a good choice.

It is constructed of industry-grade galvanized steel, offering outstanding protection against mail thefts. The box is equipped with a high-security door-drop mechanism that is resistant to prying. The key system is simply structured and easy to use. In spite of its simplicity, though, it is anti-pick. In addition, this lockable mailbox’s hinges are made of stainless steel, protecting them from rust and making them last for longer.

The mailbox has large storage space conveniently divided into compartments. The upper section is designed for US mail, with an incoming mail slot and outgoing mail slot. Once dropped off, the mail is deposited in a dry storage section from where they can be easily picked up, which is sealed to prevent moisture leaks that would cause damage to parcels and documents. The lower section is made for parcels from abroad. The packages end up in separate storage compartment to make sure they don’t mix up with the US mail. It can store a significant amount of US and international mail at once. It is your perfect choice if you send and receive both types of mails on regular basis.

When it comes to downsides, the bulky size may actually come with some challenges. You will have to choose the place for the mailbox carefully so that it doesn’t create obstacles on the walkway, driveway or porch. Depending on your landscaping tastes and choices, this big black box may seriously spoil the visual appeal of your front/back yard. You may want to install it in an inconspicuous area to make sure it doesn’t steal the show. On the other hand, if you are clever and up to the challenge, you could probably quite nicely incorporate this into your overall landscaping design. This box is heavy which makes carrying it around difficult, so make sure to get a friend to help you with lifting it.


  • Innovative door-drop protection
  • Anti-pick key system
  • Heavy-duty steel structure that resists to vandalism
  • Compartments for diferent types of mails
  • Vast storage space
  • Stainless steel hardware


  • May spoil the appeal of your outdoor landscape
  • Is too heavy

Gibraltar Mailsafe Medium Capacity Wall Mount Lockable Mailbox

Gibraltar Mailsafe Medium Capacity Wall Mount Mailbox – Check Price on Amazon

When it comes to mail security, there is something of a sliding scale of protection. So far, we’ve been looking at models that are on the top end of the spectrum. However, if you aren’t as paranoid about your mail getting stolen, or you just want something more cost-effective and easy to install, then this unit from Gibraltar Mailboxes may be a better option.

Unlike the other boxes we’ve seen thus far, this one is made of thick aluminum instead of steel. This ensures that the whole thing isn’t as heavy or as bulky, making it easier to attach to the side of your house or mail post. However, the downside is that it’s easier to break into, so keep that in mind.

Overall, this box is perfect for anyone who lives in a safe neighborhood but still wants some added security. The locking mechanism ensures that your mail stays safe from prying hands. And the cam lock door helps keep them out as well. It’s not as secure as a baffle, but it’s more than sufficient for any opportunists looking for a score.


  • Compact size
  • Durable metal and aluminum construction
  • Built-in mail flag
  • Cam lock door prevents theft
  • Black or white design
  • Wall-mounted
  • Compartmentalized delivery system
  • Lightweight and easy to install


  • Not as durable as steel models
  • Not designed for receiving packages

Salsbury Industries Aluminum 3504ASU Surface Mounted Vertical Lockable Mailbox

Salsbury Industries Aluminum 3504ASU Mailbox – Check Price on Amazon

If you’ve owned an apartment building before, or a house with multiple residences or work spaces (eg granny flat, cabins, home office/studio), then finding the right mailbox is a part of the process of managing separate dwellings. If you’ve been searching for a good mailbox system that can receive mail for several dwellings located on your property, then this one from Salsbury Industries will be the product for you. The quality of it will be much better than other units that you may have encountered and appears to be pretty durable as well.

The pricing of this industrial mailbox may be a bit higher than other units out there that you may have looked at, but that is the trade-off when buying a higher quality product such as this. Constructed from aluminum, this mailbox is scratch resistant, ensuring a nice finish for years to come. The way the boxes lean out to insert the mail is a nice touch to the product. Another detail that while small is nice, is the fact that it has slots to put place cards on each mailbox slot. This particular mailbox has 4 slots, but they also manufacture it with 3 to 7 compartments.

One issue you may run into is attempting to get duplicate keys made for this unit for some odd reason. It is not a huge issue but an issue nonetheless. Overall you shouldn’t have much bad to say about this product besides maybe a few nitpicks, but really this is one of the best mailbox units out there.

Full specifications and technical details for the 3504ASU mailbox system are available via the Salsbury Industries website.


  • Nice sleek look
  • Durable and secure
  • The carrier access door
  • Different color options for this unit
  • Custom engraved place card for each door


  • Not too expensive but could be lower in price
  • Inability to get duplicate keys made for this unit.

USPS Regulations For Locked Mailboxes 

When it comes to locking mailboxes they are regulated under the USPS the same way as a standard mailbox. This means that the locking mailbox must be approved by the postmaster. 

Here are the following requirements that the postmaster has set in place for locking mailboxes. The incoming mail slot for these mailboxes has to be 1.75 inches high by 10 inches wide and the protective flaps must be facing inward so it is easy for mail carriers to put mail in the mail slot. 

Other qualifications that is for locking mailboxes is that the slots must be large enough to hold unfolded U.S. priority envelopes and you cannot put a lock on a traditional mailbox. Once again USPS postal carriers do not open locked mailboxes and cannot receive keys from the owner of locked mailboxes.

Locking Mailboxes FAQs

How to properly clean a locking mailbox?

Locking mailboxes need to be maintained just like any other mailbox but the good thing is that all mailboxes are made to withstand the outside elements. So most mailboxes including locking mailboxes have some type of weatherproof coating that keeps them from suffering severe erosion. The only thing that the owner of a locking mailbox has to do to maintain the mailbox is to keep the mailbox clean so that dirt buildup will not take away that shiny pristine look. The proper way to clean a locking mailbox is to use a soft cloth that is dampened with a mild cleaner. The reason why you use that mild cleaner is that abrasive cleaners will scratch the mailbox. If you noticed any runoff on the mailbox make sure you wipe it off from top to bottom. After cleaning the mailbox then you rinse it with plain water and pat it dry with a clean soft cloth. One thing you should never do is clean your mailbox using extreme temperatures

USPS approved secure mailbox
In the US, lockable mailbox manufacture is regulated by USPS.

How Secure Are Locked Mailboxes?

When you have a locked mailbox your incoming mail will be protected from mail and identity thieves once it is dropped into the incoming mail slot. The owner of the locked mailbox just has to make sure that the incoming mail slot is small enough so that prying hands cannot reach in. It is recommended that an additional lock be placed on lock mailboxes. This additional lock is known as an anti spray mechanism that keeps potential thieves from prying the latch open. The reason why you want this anti-spray mechanism is that on some occasions a locked mailbox can be pried open with a screwdriver. The one downside to locked mailboxes is that the outgoing mail is not protected.

Can I Paint A Locked Mailbox?

The locked mailbox itself can be any color that the owner wants. The only thing that must be in specific guidelines is the color of the lock mailbox flag. The flag can be any color except for shades of blue, white, brown, or green.

Are locking mailboxes worth it?

Locking mailboxes ensures personal privacy is maintained. Moreover, you can have peace of mind throughout your daily life without thinking of theft. Investing in locking mailboxes gives you control and protection of unsupervised mails.

Does the post office sell mailbox locks?

Many post offices provide mailbox locks, depending on the mailing company. The majority of them sell mailbox locks at different prices regarding the type and quality of locks. Additionally, various mailing companies provide free advice on the type of mailbox lock to purchase, depending on your security needs.

Are brick mailboxes legal?

Different states have various regulations pertaining to the installation of bricks mailboxes. Some states require brick mailboxes to be installed on private property only. However, the majority of states term installation of brick mailboxes on driveway sentences and columns as illegal. These kinds of mailboxes are considered permanent structures and cannot be placed on the state’s right of way.

Do I need permission to move my mailbox?

Regardless of the distance, you intend to move your mailbox, you need permission to move your mailbox. The restrictions are put in place to avoid delivery mistakes. Thus, you need to get permission from your existing post office and inform the delivery manager about the changes.

Final Verdict

If you’re looking for the best-rated locking mailbox, as you can see here you have got a lot of options. And to be honest, it is really hard to tell you which one is the best, because they are all excellent mailboxes depending on their application. There is no one ‘best’ mailbox, as this depends a lot on your needs and where it will be installed.

Having said that, we feel that all the locking mailboxes from Mail Boss are great. This is a company with a long history of making quality locking mail boxes, who specialize in quality and know what they’re doing. There are quite a few Mail Boss mailboxes in this list, so go ahead and check the reviews and features to find the one you like the look of most and which meets your mail requirements.

Happy mailing!

This article was originally written on 4 April 2018, updated on 5 February 2022, updated 29 June 2022, and updated 17 April 2023.


  • Todd Davis

    A jack of all trades, Todd has been a DIY enthusiast, traveler, and writer for many years. He has a deep understanding of all types of painting tools and door hardware, and has shared many articles on these topics throughout the years.

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