e-mail, calendar, addressbook, cloud-storage



E-mail-account & cloud-storage from 1€ per month

Ad-free & anonymous – Your data belong to you

Data security with a comprehensive encryption concept

Reliable spam protection, own domain possible

Servers located in Germany & german data protection laws

Try our services free of charge
for 30 days.

E-Mail Account

Enjoy an ad-free mailbox – fitted with the latest anti-spam- and anti-virus systems; and your data kept safe by systems compliant with German data protection law.

>> More information

Cloud Office

Have your address book, calendar, and task planner with you on the go. Also includes storage space for documents and media files as well as office software in your browser.

>> More information


We offer an secure mailbox with extra options to adjust settings to your individual security demands. For example, your mailbox can be fully PGP-encrypted.

>> Technical details

Fair prices

Private customers have access to a range of affordable tariffs. For instance, get 2 GB file storage, 3 aliases, and 100 MB Cloud Office space for only 1€/month!

>> See our tariffs

Data Protection

We want your personal data and communication to remain private and secure. Our data protection statement explains what data we store, for how long, and why.

>> See our statement

Active since 1989

We have been operating secure e-Mail servers and Linux systems for decades. Learn more about our history and the team at

>> More about our history

Latest News

Daniel Gultsch, creator of “Conversations”, visits

Our XMPP chat service has been around for a while and its age is now showing, as support for some features is missing our out of date. Who better to ask for advice than Daniel Gultsch, creator of the popular XMPP app „Conversations“, which incidentally, is being widely used by our own team here at […]

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Maintenance work on the database cluster on August, 14th

Dear customers, Starting Tuesday 10 p.m. CET our team will make extensive changes to our database cluster in order to support the new Open-Xchange Version 7.10. These changes will result in a temporary inaccessibility of our webmailer, user-forum and ActiveSync. This will last for about 3 hours. Sending and receiving e-mails via IMAP and SMTP should work […]

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PGP-Exploit EFAIL discovered – Guard appears unaffected though

A research team around Professor Sebastian Schinzel from the University of Applied Sciences in Münster, Germany, has announced that they are going to go public with details about a newly discovered vulnerability in PGP on Tuesday this week. This discovery could cause ripples across the Internet, as many modern communication services depend on the asymmetric […]

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