Retarus Transactional Email

6.8easy start · #16 of 41
in Transactional Email Software

Free to practise onnot on record
Free trialyes
Well documentedyes
Runs where you worknot on record

Runs on api, Web.

Retarus Transactional Email is ranked #16 of 41 in transactional email software on The Geeks Club, made by Retarus Transactional Email (Munich, Germany). It runs on API, Web. A free trial is offered.

Retarus Transactional Email plans and pricing

All plans

Free trial Free 30 days · maximum 5,000 emails · maximum 200 emails/hour · no load testing retarus.com · 1 Oct 2026

Transactional Email Not published REST and SMTP APIs · contractually guaranteed throughput · schedule a demo retarus.com · 1 Oct 2026

Compared on transactional email software

Phishing detection: Yes
Malware scanning: Yes
Attachment scanning: Yes
Quarantine access: user_and_admin
Supported mail platforms: Microsoft 365; existing email systems and mail servers
Quarantine retention: 30 days
Deployment type: cloud_gateway

Best Retarus Transactional Email alternatives

See all 20

turboSMTP 0 of 4 in the starter kit Lesson 17.9 Postmark 0 of 4 in the starter kit Lesson 27.7 Twilio Segment 0 of 4 in the starter kit Lesson 37.7 Twilio SendGrid 0 of 4 in the starter kit Lesson 47.6 MailerSend 0 of 4 in the starter kit Lesson 57.5 Mailchimp 0 of 4 in the starter kit Lesson 67.1

The record

Delivery methods: both
Event webhooks: Yes
Dedicated IP option: Yes
Purpose: Sends large volumes of transactional emails directly from business applications through Retarus Enterprise Cloud.
Delivery rate: Retarus states a delivery rate of 98% or higher.
Throughput: The service states guaranteed processing capacity of 100,000 emails per hour, while its Email API page states capacity of up to 10 million emails per hour.
Interfaces: Transactional Email provides REST API and SMTP interfaces, with JSON and SMTP/MIME data-format support.
Integrations: Retarus says Transactional Email integrates directly with SAP, Microsoft, Salesforce, and ServiceNow business applications.
Authentication: Available authentication methods include SMTP basic authentication, SMTP source-IP authentication, and REST basic authentication.
Email security: Features include SPF, DKIM, DMARC, enforced TLS, antivirus multiscan, encrypted attachments, and message signing.
Compliance: Retarus states that its data centers fulfill requirements including EU GDPR, HIPAA, Sarbanes-Oxley, PCI DSS, CAN-SPAM, and TISAX.
Data centers: Retarus processes data in self-operated data centers in Germany, Switzerland, the United States, and Asia, without hyperscalers.
Monitoring: The myEAS web portal provides dashboards, real-time monitoring, reporting, and self-service configuration for administrators.
Email search: The Email API supports searching outbound emails by time period, message ID, sender, and recipient, with status information for the past 45 days.

Where it ranks on The Geeks Club

Best Transactional Email Software in 2026#16 of 41
Best Email Anti-Spam Software in 2026#5 of 27

Is Retarus Transactional Email yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Retarus Transactional Email

Sources

retarus.com/products/transactional-email/· checked 20 Sept 2026
docs.retarus.com/tem/transactional-email-description· checked 1 Oct 2026
retarus.com/products/transactional-email/native-api· checked 1 Oct 2026
docs.retarus.com/tem/product-sheet-transactional-email-1· checked 1 Oct 2026
retarus.com/blog/en/now-try-out-email-for-applicati· checked 1 Oct 2026
retarus.com/products/email-security/· checked 28 Sept 2026