Comprehensive Email Security and Management – Modular, Compliant, Future-Proof
Secure and control your business-critical communication. Developed in Europe for companies around the globe. Add specific modules as required.
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If digital sovereignty matters to you, make sure to choose a provider with European roots and ownership!
Enterprise-Level Security
Protect your email communication with award-winning threat detection and reduce existing exposure with an additional security layer.
Scales and Integrates Flexibly
Perfect for complex, hybrid IT architectures. Integrates into existing email systems and processes with ease as a gateway or via API.
Total Transparency, Total Control
Benefit from seamlessly integrated infrastructure and compliance add-ons. With transparent management of all your email processes and data in just one place.
One Solution for Your Needs
Secure Email Market Quadrant, 2025*
*Radicati Market QuadrantSM is copyrighted March 2025 by The Radicati Group, Inc.
Flags added by Retarus.
Email Security and Management
Secure Email Gateway
Advanced Threat Protection
AI-based Sandboxing
Postdelivery Protection
Email Security API
Email Security API
Third Party Integrations
Email Infrastructure
Transactional Email
Policy Engine
Routing and Rewriting
Email Compliance
Email Archiving
Email Encryption
Email Continuity
Secure Email Gateway
Microsoft 365
Planned: Google Workspace
VPN, TLS
Secure Email Gateway
Microsoft 365
Planned: Google Workspace
VPN, TLS
Solutions for the Security Focused
Do you value reliable email communication, compliance and transparency? We provide tried and tested solutions for sectors with precisely these requirements – with experience and expertise gained in countless projects in the healthcare, pharmaceutical, finance, tech and manufacturing sectors.
“Hidden Champions” with Aspirations
Larger mid-sized companies from a wide range of sectors appreciate their close, dependable collaboration with Retarus. With local representation in all European markets, North America and Asia, we ensure trust, stability and future readiness.
Complex Global Enterprises
Multinationals benefit from audit-ready data centers and processes, as well as our project-based implementation. Our solutions adapt to complex infrastructures. We offer a global service with local processing and full control over your data and processes.
System Integrators and Vars
With us, channel partners profit from a well-established manufacturer with decades of experience in email security, email management and messaging. With direct access and dedicated support experts. We are your partner when it comes to shared projects, integration or white-label models on the global stage.
Customer Ratings and Reviews
“Our mail users have no troubles with using the processes related to Retarus. Releasing spam, maintaining personal black- and whitelists and understanding the need of an antispam/antimalware protection.”
Read full review IT Services, Management / Business Consulting
“In Retarus we have found a dependable partner for our email communications. Thanks to their reliable and innovative solutions, we are very well protected against any threats, both now and in the future.”
Read customer story Stefan Hopf, Head of Messaging and Collaboration, Continental AG
“Retarus Email Security is highly reliable and provides excellent detection rates.”
Read customer story Kurt Walther, Director Global IT and Business Intelligence, Puma AG
“Retarus is now so established at medbo that we simply think of you first whenever it comes to email. We get the impression that you all know what you’re doing.”
Read customer story Jürgen Schmalzbauer, Data Center Manager, medbo
“In a few words : The service works fine. It's easy to maintain and nearly self explaining. Our users are very pleased with Retarus. ”
Read full review Consumer Goods, IT
Why Choose Retarus’ Email Security and Management Solutions?
All-Encompassing, Flexible Cloud Offering
Local Processing Guaranteed
30+ Years of Enterprise Project Experience
Real Experts, In-House Support
One Channel, All the Answers
Secure Email Gateway
Protect your email accounts from spam, malware and phishing attacks with our Secure Email Gateway – no matter where or by whom they are hosted.
Email Security API
Integrate our email security solution seamlessly into cloud platforms such as Microsoft 365 via API. For added, cost-effective protection.
Frequently Asked Questions
What differentiates Retarus from other email security providers?
Our services don’t stop at email security. We combine data sovereignty with a comprehensive portfolio that considers all aspects of email as a communication channel.
Can the solution be integrated into my existing infrastructure?
Our email security and management solutions are seamlessly integrated into existing systems such as Microsoft 365 using an API (ICES approach). Especially beneficial in complex and hybrid infrastructures. It can also serve as a secure email gateway (MX record).
What exactly does “modular” mean?
Our solutions have a modular structure. What’s more, all modules are perfectly integrated and interoperate seamlessly. For instance, you may start out with security and later add continuity, encryption, archiving or policy services to meet your changing requirements. Many of these solutions can be activated individually only for specific groups of users in your organization (e.g., based on location or department) at user account level.
Which support options does Retarus offer?
You have direct access to a support expert in your own region. No external call centers – you get real technical support from a real person. What’s more, we exclusively work with established, experienced channel partners.
Where and how does Retarus process data?
As a European company, headquartered in Germany with subsidiaries and branch offices in Europe, Asia and the USA, we operate our data centers ourselves – without any dependency on hyperscalers. Our infrastructure spans the globe, with sites in the EU, Switzerland, Asia and the USA. Processing data locally ensures that data processed for European customers takes place exclusively in Europe, unless otherwise agreed. For our US customers, data is processed in our American data centers. Maximum transparency and flexibility – you define contractually where your data is processed, we make it happen. Reliably, in line with the GDPR and meeting the highest security standards.
What is Retarus’ approach when it comes to sustainability?
We invest in energy-efficient data centers, CO₂-saving infrastructure and continuously optimizing our processes. Find out more here.