Secure email for your business.

Save time and money by hosting all your business emails end-to-end encrypted on GMX-Mail's secure servers.
Encrypted Email
With end-to-end encryption and 2FA, your emails have never been more secure. The built-in encryption guarantees that your mailbox belongs to you: Nobody can decrypt or read your data.
On Any Device
Our apps for iOS, Android & desktops let you send secure emails wherever you are. Our fast web client & apps make sure email encryption is a pleasant experience.
GMX-Mail mailbox on a mobile phone.

Focus on Your Email Needs

We put the email needs of your business first by providing a secure email service that lets you focus on the things that matter. With custom domain support, flexible user addition, whitelabel customizations, smart filtering, and GDPR compliance, we strive to make GMX-Mail the perfect email service for your business.

Save Time and Money with GMX-Mail

GMX-Mail hosts all your business emails end-to-end encrypted on highly secured servers. We enable your business to use the benefits of the cloud - availability, cost-efficiency, flexibility, automatic backup - without compromising on security. With GMX-Mail you own your data, no one else can access it.
Screenshot of the GMX-Mail mailbox on an iPad.
Screenshots of whitelabel version of GMX-Mail, the provider to secure your business emails.

Whitelabel Your Mailbox

GMX-Mail's comprehensive whitelabel customizations are the perfect solution for your business as you can present the GMX-Mail mailboxes with your corporate design: Employees and external recipients will not notice that they are accessing GMX-Mail, they will only see your website and your branding.

In the course of our activities, there are also particularly confidential communications that must run outside our own domain. We asked our IT security experts to carry out an evaluation of the providers and they chose GMX-Mail. I myself like working with GMX-Mail because it is easy to use and I know that communication here is in good hands.

Dr. Frank Hülsberg, Warth & Klein Grant Thornton AG


We chose GMX-Mail as a "secure by design" email provider. Due to its encryption GMX-Mail fully complies with GDPR requirements, which makes it perfect for business use. GMX-Mail is fast, reliable, always up-to-date and meets our needs. All of our clients' industrial confidential information is kept secure.

Michalis Apostolou, EPD Engineering Services


In a very sensitive business environment, we have chosen GMX-Mail among various encryption programs. GMX-Mail impresses with its extremely simple application. Even non-technical colleagues can encrypt sensitive attachments and texts in accordance with data protection regulations. The simple administration, immediately accessible & always friendly experts and a fair pricing also stand out.

Dietmar Kopp, Maria-Montessori-School

All Business Features of GMX-Mail

Custom domains

Use your own email domains with DKIM & DMARC support & the option to activate catch-all.

Multi-user support

Manage all email users of your business. Add and remove users as needed.

Alias addresses

Add and disable alias addresses according to your needs. All users of your account share booked aliases.


Add storage according to your needs. Booked storage packages are shared among all users of your account.

Encrypted email to anyone

GMX-Mail lets you send an encrypted email to anyone easily.

Encrypted contact form

Add Secure Connect, the end-to-end encrypted contact form, to your website so that clients can easily reach you confidentially.

Access on any device

Access your encrypted mailbox with our intuitive web client, apps for Android & iOS as well as desktop clients for Windows, Mac OS and Linux.

Inbox rules

Use smart filters to automatically organize incoming emails.

Zero-knowledge full-text search

Use the extended search feature that lets you search your entire encrypted mailbox and encrypted contacts locally on your device to ensure data sovereignty.

Low starting price

Add or disable users, alias packages, storage packages, and encrypted contact forms anytime.


GMX-Mail uses 100% renewable energy to protect our environment.

Special offer for NPOs

The business version of GMX-Mail is available with a discount or for free for non-profit organizations.

Flexible development

Our development team is dedicated to add any missing feature for your enterprise. Please get in touch.

Unlock cloud benefits

Due to the built-in encryption, GMX-Mail combines the advantages of self-hosting with the advantages of the cloud.

TOTP for second factor authentication

Two-factor authentication with an authenticator app is supported.

U2F for second factor authentication

Two-factor authentication with a hardware token (U2F) as the most secure option is supported.


GMX-Mail is compliant with the GDPR and lets you send end-to-end encrypted emails to any email address easily.

Custom logo & colors
Customize text in notification email
Login on own website
Switch between formal & informal language (Du/Sie in German only)
Custom meta tags
Custom link to legal notice
Custom link to data privacy
Optional: Book Secure Connect, the encrypted contact form

Secure Your Communication Now

Secure, green and ad-free. Email to feel good about.