Retarus Email Security: Comprehensive, Reliable, European Excellence
Secure your emails without compromise. GDPR-compliant, advanced, modular cybersecurity for complete protection.
Book a demoReta's Pro Tipp
If digital sovereignty matters to you, make sure to choose a provider with European roots and ownership!
Security to Meet High Standards
Scalable and Easy to Integrate
Full Control, Total Transparency
Scale with Your Needs
Secure Email Market Quadrant, 2025*
*Radicati Market QuadrantSM is copyrighted March 2025 by The Radicati Group, Inc.
Flags added by Retarus.
Email Network Diagramm
Secure Email Gateway
Microsoft 365
Planned: Google Workspace
VPN, TLS
Secure Email Gateway
Microsoft 365
Planned: Google Workspace
VPN, TLS
Security Solutions for Regulated Sectors
Mid-sized Companies, Global Goals
A wide range of leading mid-sized companies from various industries rely on us. With local representation in Europe, North America and Asia, we secure your global communications and offer close collaboration and long-term prospects.
Multinational Enterprises
Multinational corporations benefit from our audit-ready data centers, transparent processes, and project-based implementation. Our solutions flexibly integrate into complex infrastructures – providing local processing and giving you full control over your data and workflows.
System Integrators and Vars
Our channel partners benefit from an experienced manufacturer of email security, management and messaging solutions. We offer direct access, dedicated support experts and flexible models for integration scenarios, project partnering 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
One Solution, Two Deployment Models
Secure Email Gateway
Protect your email accounts reliably from spam, malware and phishing attacks with Retarus Secure Email Gateway – no matter where or by whom they are hosted.
Email Security Connector
Integrate Retarus Email Security seamlessly into cloud platforms such as Microsoft 365 using an ICES approach – for additional, efficient protection.
Complete Protection: Our Email Security Features.
Advanced Threat Protection
AI-Powered Sandboxing
Post-Delivery Protection
Email Continuity
Add-ons for Compliance and Email Management
Email Encryption
Email encryption as easy as email itself – secure, user-friendly, fit for everyday business.
Read moreEmail Archive
Archive your emails in real time – legally compliant, searchable, available for up to ten years.
Read morePolicy Engine
Smart routing for smarter workflows: Control, analyze and forward emails even before delivery to your systems.
Read more
Retarus Email Security: The European Advantage
Full-Service Cloud Offering
Truly European, No Compromises
Enterprise Expertise Since 1992
Real People, Real Support
Frequently Asked Questions
What differentiates Retarus from other email security providers?
End-to-end email security, European-engineered: We combine advanced threat protection with true data sovereignty, offering a comprehensive modular portfolio for the entire email ecosystem.
Can the solution be integrated into my existing infrastructure?
Yes, our solutions can be integrated seamlessly into existing systems, such as Microsoft 365, using an ICES approach. Companies operating complex and hybrid infrastructures especially benefit from our exceptional flexibility. The solution is also available as a secure email gateway via MX record.
What does “modular” mean in practical terms?
Start out with the services you require – for instance, email security – and add modules such as continuity, encryption, archiving or policy engine later to meet your changing needs. All components are optimally interoperable and can be activated as required at the user account level (e.g., for specific departments or locations).
Which support options does Retarus offer?
At Retarus you speak to real people – dedicated local representatives and technical support directly from our engineers. No call centers or waiting on hold. When it comes to channel scenarios, we exclusively work with established, experienced channel partners.
What is Retarus’ approach when it comes to sustainability?
Sustainability is deeply rooted in our corporate strategy. We invest in energy-efficient data centers, low-emission infrastructure and continuous optimization of our processes – for sustainable IT security with corporate responsibility and accountability. Find out more here.