Retarus Transactional Email: Fast, Reliable, and Secure
We offer guaranteed throughput rates, first-class inbox placement, and increased customer engagement through our reliable transactional email delivery.
Schedule a demoReta's Pro Tipp
Those with the highest standards rely on us. They trust us. Because they can.
High Performance
Send high volumes of emails via API from your business applications with contractually guaranteed throughput rates without straining your own infrastructure.
Improve Your Reputation
Retarus is a leader in reputation management and CSA (Certified Senders Alliance) certified. We protect your domain, IP reputation and sender score.
Get The Most Out Of Your Email
Our comprehensive APIs simplifies your email workflows. Outsource resource-heavy capabilities like Templating, Sanitization, Optimizations, Rendering and more.
Expansive Compliance and Certifications
Adhere to local data protection regulations and 100% GDPR-compliance. We process data in self-operated data centers in Germany, Switzerland, US, or Asia.
Cloud Transactional Email Data Flow
- SMTPAUTH
- OAUTH
- IPAUTH
- DMARC
- DKIM
- SPF
- Unsubscribe list
- Suppression list
- Bounce management
- CSA Certified IPs
- Template rendering
- Address rewriting
- Message resend
- Campaign support
- Anti virus multiscan
- Message signing
- Secure document handling
- 3rd party archiving
- Spam Score Check Report
- Feedback Loop Reporting
- Open-/Link Tracking
- Bounce Reporting / Response Manager
- Trace and Recover
Who is Retarus Transactional Email for?
One size does not fit all. Our clients rely on Retarus for highly capable, high-volume emailing to their end customers. Whether for critical communication, increasing customer engagement, application integration, or specialized requirements.
Large Enterprises
Diverse recipients and communication preferences, complex business workflows, and high-volume demand can quickly strain email infrastructure. Enterprises need an intuitive solution, especially when their Email Infrastructure is complex with on prem, cloud, legacy, or 3rd party applications, devices, subsidiaries.
Highly Regulated Industries
Sending or receiving critical information such as invoices, order confirmations, or time-sensitive notifications cannot afford any delays or land in spam. Strict compliance regulations in sectors such as healthcare, manufacturing, retail, finance, and legal force businesses to find a reliable, secure email solution.
Customer Ratings and Reviews
“Retarus reacted swiftly to our enquiry, understood our needs and professionally implemented the project within a very short space of time.”
Read customer story Patrick Brandner, Application Hosting Service Delivery Manager, Solvay SA
“The collaboration with the team at Retarus was uncomplicated, and within a few weeks we had access to the interface from the Swiss data center. The integration was extremely easy for my team.”
Read customer story Riccardo Trombini, CTO, Starmind AG
“Like samedi, Retarus places great importance on data protection and compliance. Modern programming interfaces made it easy to integrate the services into our platform and they were up and running quickly and reliably.”
Read customer story Michael Siebert, Chief Principal Engineer (CPE), samedi GmbH
“The Retarus Cloud Fax Services, in combination with the Datanet CTO tool, enable the automated provisioning and billing of our fax users. At the same time, we have been able to reduce our monthly fax costs considerably in comparison to our previous, server-based solution – especially with respect to maintenance, operation and licenses.”
Read Customer Story Siegfried Ocklenburg, Cluster IS Infrastructure Manager, ABB
“Retarus and Symtrax provided us with a turnkey solution, so that we could immediately test it under real production conditions. Within two days the service was ready to use productively.”
Read Customer Story Jean-Michel Brégeat, Head of Sales, Aigle
Why Choose Retarus Transactional Email?
Highest Throughput Rates
Advanced Reputation Management and Beyond
- Unparalleled inbox placement (average sender score = 99, industry average is 85). Dynamic IP routing according to sender domain, CSA certification, bounce management. SPF, DKIM and DMARC implementation to maintain a high inbox placement.
- Convey trust, confirm email authenticity, and increase email acceptance with Messaging Signing.
Auditable Data Centers
- Data centers in the United States, in Europe and in the APAC region
- Retarus’ data centers are self-operated, self-sufficient, and redundant
- No hyperscalers, local data processing available
- Multi-client capability thanks to multi-domain configuration. Failover and load balancing options available
- All data centers are operated according to the latest standards and fulfill strict requirements: EU GDPR, HIPAA, Sarbanes-Oxley, or PCI DSS, CAN-SPAM, TISAX
Fast Implementation
- Our experienced team handles every detail of onboarding and go-live.
- Devoted service management makes sure you get the most out of your email.
Real People, Real Support
- No call center nor chatbots
- You get experts who know what they are doing
- We become part of your team from scope, migration, production and Go-live
Transactional Email Tailored to You
Native APIs & Gateways
Easily integrate Retarus Transactional Email into existing workflows via APIs including REST and SMTP to reduce complexity and bolster your landscape.
Transactional Email for Business Applications
Retarus Transactional Email integrates directly via business applications including SAP, Microsoft, Salesforce, or ServiceNow.
Frequently Asked Questions
Is there documentation available about compatibility and feature details?
Yes. Retarus Transactional Email supports numerous types of business applications and has a rich feature set. Detailed feature overviews and documentation can be found here.
Is the implementation of transactional email difficult?
Not with Retarus. Enterprises often have complicated requirements or critical processes that cannot be interrupted, but we have experience from thousands of successful migrations and onboardings with many of the world’s leading companies.
Where can I find out more?
Read our case studies and analyst reports. Check out our corporate blog and upcoming webinars, and feel free to book a demo. We’re always happy to help.