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Flush-mounted
mailbox systems

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Stylish and discreet rather than space-consuming, even with a large number of parties and spacious compartments: these are our flush-mounted mailbox systems.
Further advantages of this type of installation: existing delivery and walking routes are retained and the space required is minimal. However, the corresponding structural requirements must be met and care must be taken during installation.

Premium Unterputz-Briefkastenanlage in poliertem Edelstahl mit Klingeltastern und Video Gegensprechanlage
Unterputz Briefkastenanlage in Edelstahl
Unterputz-Briefkastenanlage in Edelstahl mit Lasergravur, Video Gegensprechanlage und Display
Unterputz-Briefkastenanlage in Edelstahl mit Klingeltastern, Lasergravur und Video Gegensprechanlage
Unterputz Briefkastenanlage in Edelstahl mit Klingeltastern, zweiten Namensschild und Video Gegensprechanlage

Flush-mounted mailbox systems. Individually configured.

Configure your flush-mounted mailbox system according to your personal requirements. A wide range of components offers maximum flexibility. We can also adapt your system to your own modules, such as cameras, displays or other devices. Please feel free to contact us personally. You can choose from:

100 +
Mailboxes
100 +
Colors
0
Panels
0
Door Bells
0
Flaps
0
Locks
0
Name tags
Request a free consultation

Your mailbox system, your way: customisation at a glance

Colors, materials
and finishes
Intercom with audio and video camera
Lighting for mailbox systems
Design
Security
Labeling
Extra functions

A century and a half of quality at the highest level

KNOBLOCH has been family-owned for more than 150 years. Today, around 200 employees use modern technology to manufacture mailboxes, mailbox systems and accessories as well as other high-quality products for entrance areas both at our old site and at the new KNOBLOCH City in the industrial estate in Döbeln.

KNOBLOCH: Your expert for mailbox systems

Mailboxes in
over 200 colours

At KNOBLOCH, you can choose from over 200 colours – or specify your desired colour as a RAL colour code. We also offer premium surfaces for an even more attractive look.

Design mailboxes.
From simple to premium.

Our range of mailboxes extends from simple and functional to luxurious and playful premium. The look of your mailbox system is entirely up to you.

Fast delivery
to your home

We deliver your new individual mailbox in as little as 10 working days. For mailbox systems with customised configurations, we only need a few days longer.

Simple assembly
with our support

KNOBLOCH systems are supplied with detailed and easy-to-understand documentation of the individual steps. They are usually fully assembled within a few hours.

155 years of innovation
and tradition

With over 150 years of history, KNOBLOCH is the oldest mailbox company in Germany, which is why we can give you a double promise with a clear conscience: you will never hear ‘we’ve never heard that before’ from us, and spare parts for your system will still be available in 10 or 20 years’ time.

Quality und Service
Made in Germany

At KNOBLOCH you have direct contact with the manufacturer and the design department. This is rarely possible with suppliers from the Far East.

Pictures of flush-mounted mailbox systems

Unterputz-Briefkastenanlage des Campusmitte in München mit Klingeltastern und Zusatzmodulen. Die Briefkastenanlage ist in eine Betonmauer integriert
Hauseingang mit einer Unterputz-Briefkastenanlage in Edelstahl
Unterputz Briefkastenanlage
Unterputz-Briefkastenanlage in Edelstahl in Holzelement integriert
Unterputz-Briefkastenanlage in Edelstahl mit Klingeltastern, Lasergravur und Video Gegensprechanlage
Unterputz-Briefkastenanlage in Edelstahl mit Lasergravur, Video Gegensprechanlage und Display
Premium Unterputz-Briefkastenanlage in poliertem Edelstahl mit Klingeltastern und Video Gegensprechanlage
Hauseingang mit einer Unterputz-Briefkastenanlage im Sonderformat mit Klingeltastern, Display und Zusatzmodulen
Unterputz Briefkastenanlage in Edelstahl mit Klingeltastern, zweiten Namensschild und Video Gegensprechanlage
Unterputz-Briefkastenanlage in Edelstahl in eine Mauer integriert
Unterputz Briefkastenanlage in Edelstahl
Setcards

Flush-mounted mailbox systems. Frequently asked questions.

What is a flush-mounted mailbox system?

A flush-mounted mailbox system is a mail reception system for direct integration into walls. A corresponding cut-out must be available on site in a wall or façade into which the system is inserted. A flush finish with the wall is the most commonly used form, but partial recessing is also possible, where the front of the system protrudes a little from the wall into the room. In both cases, the result is a rather unobtrusive appearance with space-saving integration into the building.

  • Aesthetics: the flush-mounted or partially recessed installation allows the system to blend discreetly into the building’s appearance
  • Space-saving: no additional space required on paths or in the entrance area because the system literally disappears completely or in large parts into the wall
  • Weather protection where necessary: integration into the wall also offers additional protection from rain and snow if the system is installed in an external wall, for example next to the front door

KNOBLOCH uses the same high-quality materials as for the other types of installation, but they are processed differently to enable installation in masonry or façades:

  • Stainless steel: durable and rust-resistant, ideal for exclusive architectural projects.
  • Aluminium: lightweight and corrosion-resistant, perfect for modern buildings and a discreet design.
  • Powder-coated sheet steel: robust and available in many colours. The system is optimally protected against corrosion thanks to high-quality galvanisation and passivation.
  • Plastic: suitable for indoor areas or as a more cost-effective alternative, but less resistant to heavy use. KNOBLOCH therefore uses plastic in mailbox systems almost exclusively for nameplates
More on colors, materials and finishes

Yes, you can 🙂 The flexibility is comparable to the other types of assembly. KNOBLOCH uses standardised mailbox compartments as versatile basic components, which can therefore be manufactured in correspondingly high quantities and at correspondingly low cost. As these basic modules are themselves available in a wide range of variants, there is an almost infinite number of possible combinations. Customisable options include:

    • Size and orientation (portrait or landscape format) of the compartments

    • Number and arrangement of compartments: from a few to several hundred

    • Colour: compartments and flaps can be designed in different colours

    • Type of insertion flaps: from simple models to noise-damped, flat or open slot variants

    • Additional functions: integration of doorbells, intercoms, parcel compartments and functional boxes (e.g. for door openers or access control)

    • Design: modern and minimalist or classic and timeless – to suit your architecture

    Tip: Use our mailbox configurator to plan your ideal system conveniently and at your own pace. You will then receive a free quote and personalised advice from us.

Configurator for mailbox systems

The mailbox is installed by fitting it into a prepared opening in the wall or façade. The typical procedure includes the following steps:

  • Preparing or cutting the niche: The required dimensions depend on the size of the mailbox system plus the installation frame.
    Please note: extras such as shadow gap frames require additional space.

  • Inserting the body: The actual mailbox unit is pushed into the wall opening and aligned precisely.

  • Drilling the fixing holes: Mark the holes, remove the unit from the recess, drill and insert dowels.

  • Final installation and fixing: Reinsert the body into the recess, check that the plaster cover frame is flush with the wall, and screw the unit into place. For outdoor installation, seal the plaster cover frame to ensure weather protection.

KNOBLOCH always supplies mailbox systems with a link to detailed installation instructions, which can be conveniently accessed via QR code. However, if the system is large enough to require more than one person for installation, we recommend professional installation to ensure stability and safety.

If the front of the system is exposed to wind and weather – for example, next to the front door – it is also advisable to call in a specialist company to ensure proper sealing and secure fixing.

KNOBLOCH offers a professional installation service – just ask us.

Yes, high-quality flush-mounted systems are extremely secure, as they are directly protected by the masonry or façade on all sides except the front. KNOBLOCH systems offer even more:

  • Robust locking systems
  • Strong materials that make breaking open as well as vandalism difficult.
Secure mailbox systems

They are. Absolutely. Thanks to a well thought-out design and the corrosion-resistant materials used by KNOBLOCH. The most important points:

  • Material quality: Stainless steel, anodised aluminium or galvanised and powder-coated sheet steel protect against rust

  • UV-resistant colours: No fading or peeling of the coating, even after several years

  • Seals and covers: Special design elements such as rain protection edges and rubber seals prevent rainwater from penetrating the compartments, even when installed outdoors

  • Detached and semi-detached houses: also with doorbell and communication unit if required

  • Apartment blocks: larger residential buildings where a uniform appearance and space saving are required

  • Commercial and office buildings: flush-mounted systems blend discreetly into façades and look professional

  • Public institutions: schools, authorities and hospitals benefit from a clear, flush-mounted solution

The European standard DIN EN 13724 specifies the requirements for size, weather protection and safety. The key points:

  • Size of the insertion slots: so that even large-format items can be inserted without kinking

  • Accessibility: the letterboxes must be at a height that is suitable for all user groups

  • Vandalism and theft protection: burglar-proof locks and sturdy materials

More about the DIN EN 13724

With the high-quality materials used by KNOBLOCH, the maintenance effort is limited. We recommend:

  • Regular cleaning: wipe with a soft cloth and mild detergent to remove dirt and dust

  • Stainless steel or aluminium care product: apply once or twice a year if necessary to maintain the shine

  • Functional check: locks and seals should be checked at longer intervals to ensure they are working properly

The price range for flush-mounted letterbox systems varies depending on the material, size and features. KNOBLOCH offers a wide range of different letterbox systems. From functional to premium models, everything is included. Individuality and customisation are our strengths.

  • Small systems: from approx. 150 to 300 euros

  • Medium-sized systems: between 500 and 1,500 euros

  • Large, customised systems: 2,000 euros and more

KNOBLOCH relies on a modular system with standardised letterbox compartments. This enables customised solutions for different budgets, always with high quality standards and a long service life.

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Dimension & Options
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