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Peer Heinlein im Gespräch mit Kollegen

Good partnership. Good work.

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As a partner for companies, public institutions and private individuals, our focus is on freedom, security and excellence. We create room for individual solutions, offer the highest degree of reliability and integrity, and will always strive for excellent results. With our partners, we build personal, long-term relationships that benefit cooperation, create trust, and ultimately makes our projects successful.

Our solutions are used by many well-known enterprises, SMEs, and public authorities. Read here why our customers have opted to choose mailbox.

Greater email security in the education sector: How oncampus secures digital learning with mailbox.

Read the success story now

Digital sovereignty at school: The Austrian Dachsberg Gymnasium successfully transitions to mailbox.

Read the success story now

Customers who trust us

On Campus Logo
Gymnasium Org Dachsberg Logo
Plusserver Logo
AFF Architekten Logo
Wappen Freistaat Thüringen
Privacy One Logo freigestellt
Logo Stiftung Datenschutz
Biomarkt Vollmershausen Logo
Computer Base Logo
ehealth experts
Waldorfschule Wendelstein Logo
Senckenberg Logo
Are Gymnasium Logo
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About source Logo
Lindenbräu Waldbronn Logo
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ver.di Logo
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energieagentur Logo
wigital Logo
IT Solution Company
Datenhain Logo
Lohnspezialisten Logo
cephei ag Logo
LAGZ Logo
foodsharing Logo
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senec Logo
Polyas Logo
Asphalta Logo
Unverpackt e.V. Logo
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Speicherhafen GmbH & Co. KG Logo
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What our customers say about us

senec Logo

We chose mailbox.org because it is one of the best-known and most secure German email providers. Since mailbox.org invests heavily in the open source community, we want to give something back to the community.

Thomas Kölzow, Chapter Lead IT-Operations
SENEC GmbH
IT Solution Company

We greatly appreciate mailbox.org because the issues that are at the forefront of mailbox.org are also what drive us in our daily work: security, data sovereignty, functionality – all based on open source software.

the IT[&]Solution Company GmbH
xoDynamics Logo

As a provider of IT security services, we set the highest standards in terms of data protection, information security and transparency. mailbox.org offers us reliable communication solutions that far exceed current standards.

Tim Mittermeier, CEO
xoDynamics GmbH
foodsharing Logo

As the operator of a large platform, we rely on the reliable delivery of large volumes of emails. mailbox.org has proven to be an excellent partner in this regard. Up-to-date security technologies, a high level of data protection and, of course, servers powered by green electricity make us completely satisfied!

IT-Admin Group
foodsharing.de
Datenhain Logo

Security and sovereignty in communication have never been as important as they are today. Contrary to the global trend of entrusting this communication to data giants such as Google, Facebook and Co., mailbox.org has created a secure communication platform that we can recommend to all our customers with a clear conscience.

André Hermbusch, CEO
datenhain GmbH
Asphalta Logo

We have been impressed by mailbox.org since 2017. In addition to email, it also offers shared folders and calendars for our daily work. Another plus is that we have experienced hardly any downtime during our time using the service.

Gerald Müller, CEO
ASPHALTA Ingenieurgesellschaft für Verkehrsbau mbh
Are Gymnasium Logo

mailbox.org runs smoothly for us in everyday use. In addition to secure email communication, we also appreciate the ease of use of the file storage system, which allows the school administration and teachers to make documents available to our students and parents for download.

Nina Pfeil, Permanent Representative of the Headmaster
ARE Gymnasium
On Campus Logo

We are very grateful for the fast, uncomplicated service and the personal and competent support.

Marc Vorreiter, Head of IT
oncampus GmbH
Verkehr mit Köpfchen Logo

We have been with mailbox.org since 2017 – the decisive factors in our decision were the server location in Germany and the integrated option for mutual calendar sharing within the team.

Hannah Eberhardt, Owner
Verkehr mit Köpfchen
Speicherhafen GmbH & Co. KG Logo

Data protection is firmly anchored in our DNA, and we work exclusively with German partners in all sensitive areas. The professional mail hosting service provided by mailbox.org fits perfectly with our data protection strategy.

Moritz von Bismarck, CEO
Speicherhafen GmbH & Co. KG
Gymnasium Org Dachsberg Logo

Unlike the tech giants, mailbox.org does not engage in surveillance capitalism. The digital footprint of students is minimised. An excellent solution for schools that take the data protection and privacy of their school community seriously.

Thomas Krupa, IT Manager
Gymnasium und ORG Dachsberg
Grüner Weiler Logo

As a young cooperative, email addresses with our own domain are very important to us, and we were impressed by mailbox.org's commitment to data protection. We also really like the video conferencing feature, which we use extensively in various working groups.

Manuela Liebold, Executive Board
Grüner Weiler eG
Computer Base Logo

Business mailbox.org provides us with email, address book and calendar services from a single source. At the same time, security and data protection are not just ticked boxes, but are actively practised. This combination was decisive for us.

Steffen Weber, CEO
ComputerBase GmbH
Biomarkt Vollmershausen Logo

Our high standards for food also apply to software: a partner who is committed to a free internet and open source software is a perfect fit. We use mailbox.org as cloud storage for backups of our cash register and emails.

Sabine Röttger, Owner
Biomarkt Vollmerhausen
A professional woman wearing a blazer and jeans stands confidently, engaging with an audience in a bright, modern meeting space.
A solution that delivers.