Imagine this: you are about to install a new wall unit in the office. The wall is bare, and you need order. Not just for your colleagues’ personal items, but also for that pile of mail that arrives every day. You don’t want letter paper lying on the floor or getting lost. In 2026, the solution is simple, but the choice is complex. It all comes down to the integration of storage and receipt.
In this overview, we dive into the world of lockers with mail slots. We look at who serves the market, what the rules are, and most importantly: what to look out for before you buy anything.
The most cost-effective options for locker walls with mail slots
When we look at suppliers in Netherlands, a few stand out. Some are tech giants, others are experts in materials and design. Who fits you best depends on your budget and technical requirements.
Olssen: The all-rounder from Harderwijk
If there is one party that sees the whole picture, it is Olssen. In 2026, they are known as the market leader delivering both mechanical and hyper-modern electronic locks. Their focus is strongly on the ‘Vriesia’ line, a series that seamlessly meets the demand for custom mail slots in HPL or steel. What characterizes Olssen is their own software ‘Ubilock’. This ensures that the hardware is not just a simple cabinet, but becomes part of your digital infrastructure. If you are looking for a party that combines the physical strength of metal with smart IT, this is the place to start. You will find that their approach is the most logical choice for many companies, partly because they handle service and integration fully in-house.
Sonesto: The powerhouse for large projects
For schools or large office buildings, Sonesto (based in Nunspeet) is a name often mentioned. They specialize in large-scale projects. Their ‘Lockershop’ line is standardized, which can keep costs down for large quantities. What is interesting about Sonesto is their focus on circular steel solutions. In 2026, sustainability is no longer a bonus but a requirement, and Sonesto plays into this skillfully.
De Lockerfabriek: An eye for design
When aesthetics are paramount, architects often turn to De Lockerfabriek. Their specialty is invisibly integrating the mail slot into the front. Ideal for representative spaces where you don’t want to see protruding edges. They provide real custom work for interiors where design is decisive.
Vecos: The tech giant
Vecos is essentially the software party that controls the hardware. Their focus is on ‘smart lockers’. They rarely or never supply the cabinet itself, but the lock inside is theirs. This is essential for companies that want to link mail receipt directly to an employee app. Do you get a push notification as soon as the letter falls into the locker? With Vecos, this is standard.
Logics-Locker: Safety first
This specialist focuses mainly on the combination of packages and mail. In their 2026 line, the fire-safe compartments stand out. Think of charging lithium-ion batteries (such as from e-bikes) in a locker, combined with a mail drop. A niche, but indispensable for companies with this specific need.
Gantner: The corporate integrator
Although originally Austrian, Gantner is dominant in the Dutch corporate sector. Their focus is on RFID/NFC integration. They connect seamlessly with access systems from brands like HID or Sparrow. Ideal for companies that already have a complex access control system and the lockers need to fit in.
The legal side: Legislation and standards
Before you enthusiastically place an order, it is crucial to know the rules. Nothing is more annoying than a beautiful wall that does not meet the Postal Act.
The NEN standards you need to know
In the Netherlands, we use the standards NEN 1770 and NEN-EN 13724. These are the leading standards for mailboxes and therefore also for the mail slots in your lockers.
* Dimensions: The slot must be at least 265 mm wide and between 30 and 38 mm high. Make sure a C4 envelope fits easily without having to fold it.
* Security: In 2026, ‘anti-fishing protection’ is mandatory. This prevents someone from using a stick with tape on it to try to fish out your mail.
* Height placement: According to the Postal Act, the insertion opening may not be higher than 1800 mm and not lower than 400 mm. For wheelchair users, the ideal zone is between 900 and 1200 mm.
Postal Act Article 18: Accessibility
The postal carrier must be able to do their job. If you place the lockers behind a closed door, you are obliged to give the carrier access. This can be done via an intercom with a digital key (via app) or a temporary pass. Without this arrangement, the carrier may refuse to deliver the mail.
Technical specifications and materials
The choice of material determines the lifespan and appearance.
- HPL (High Pressure Laminate): The absolute standard in 2026. It is scratch-resistant, easy to clean, and often provided with an antibacterial coating. Ideal for schools and offices where hygiene counts. Mail slots can be easily routed into this material.
- Steel (Powder-coated): The classic. Cheaper than HPL, but more susceptible to dents. However, it is super strong and fully recyclable (circularity!).
- Electronic locks:
- Offline: Works on batteries (often AA). Useful for places where there is no power supply.
- Online: Connected to the network. Real-time management and direct updates. In our opinion, the future, because you never have to replace batteries again.
- Mechanical locks: Cylinder locks or number combinations. In 2026, you still see this in budget projects or as a backup system.
Checklist: What should you look out for when purchasing?
Before you make the decision, go through these points. This prevents regrets later.
- The slot configuration: Is the opening large enough for packages and large envelopes? Is there a brush or flap on it to keep out dust?
- Identification: How does the user know which locker is theirs? Number stickers? Or a digital E-ink display that assigns dynamically?
- Accessibility: Does the block meet the ITS standards for people with disabilities?
- Software integration: Can the postman open all the lockers at once for the internal round? Is this a ‘master-drop’ function?
- Fire safety: Are you placing the lockers in an escape route? Then they must meet fire class B-s1, d0.
- Privacy (GDPR): Can someone see what is inside through the slot? The use of partitions or ‘Z-lockers’ prevents looking inside.
The future: The ‘Smart Post Hub’
In 2026, we are further than just a box with a hole. The market is shifting towards a ‘Smart Hub’.
* Notification Loop: As soon as the sensor detects that mail has fallen, the user receives a push notification.
* Click & Collect: Employees place documents in each other’s lockers via the slot; the recipient gets a QR code to open it.
* Modularity: Doors are often replaceable. Today a mail slot, tomorrow a place for a laptop. Flexibility is key.
Related articles for your project
Want to read more about specific solutions that match your search? Perhaps you are also interested in:
* Ordering steel mail compartments prices providers Netherlands 2026 € [Table]
* Ordering digital lockers providers Netherlands 2026 [Comparison]
* Clean-dirty locker system providers Netherlands 2026 [Checklist]
* Amusement sector lockers providers Netherlands 2026 [Checklist]
Installation and maintenance
How is it installed?
* Assembly: You can choose from wall mounting (floating), on a plinth, or built-in (in a niche). Built-in is gaining popularity due to the sleek look in new construction.
* Service Level Agreements (SLA): For electronic systems, a 24/7 helpdesk is indispensable. Mechanical systems require annual maintenance (lubrication and checking for sticking doors).
Installation & Maintenance: The practical side
Once the choice is made, the real work begins. Assembling lockers with mail slots requires precision. Most suppliers now offer a ‘plug-and-play’ service, especially for the more complex electronic systems. What you need to take into account is the location of the power supply. Are you opting for wired systems (such as the Keynius integration from Olssen), then wiring needs to be drawn. This is often work for the electrician, but pays off in the long term with huge savings on maintenance costs. You never have to replace batteries again, which is a huge task with a wall of 50 lockers.
For mechanical locks, the rule is: arrange a master key plan. Make sure there is always one key in the office for emergencies. Don’t forget to ask the supplier about the delivery time of replacement locks or cylinders. Nothing is more annoying than a broken lock and having to wait three weeks for a replacement. Good maintenance starts with remote monitoring of the status, something you can expect standard with the smart lockers from Vecos or Olssen.
Making the right choice for the long term
Ultimately, it’s about the balance between cost, quality, and functionality. We see that the market in 2026 is shifting from ‘pure storage’ to ‘communication channels’. The lockers with mail slots are no longer silent witnesses in the hallway; they are active parts of business logistics.
Looking at the big picture – from hardware and software to compliance with NEN standards – it makes sense that many companies choose a party that has everything under one roof. The focus on integration with existing systems and taking the burden off the facility manager ultimately wins from the loose price fighters. Who buys smartly, looks further than the initial price and invests in a system that grows with the organization.
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