REST API

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SecuMailer has a REST API for sending secure emails. Both the GDPR and the NTA 7516 functionality are fully accessible via this API.

The API is documented with OpenAPI specification 3.0.1.

The REST API has webhook functionality, which means that the SecuMailer platform can communicate email events with an HTTPS endpoint of the sender.

SMTP API

The SMTP API is usually the simplest integration option for many backend applications because backend applications often have a provision for an SMTP client on board.

We have successfully integrated for customers with Salesforce, SAP and Centric. We have also successfully integrated with patient file systems such as Medisoft Dossier Manager.

GraphQL API

The SecuMailer platform offers insight into email events. This can be done on the basis of a (push) webhook call (see REST API above) and on the basis of a (pull) GraphQL endpoint.

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Dutch SecuMailer and Malaysian Vulsan X Sign Partnership at North Star Dubai

Dubai, October 2025 – At North Star / GITEX Global in Dubai, SecuMailer, a certified Qualified Trust Service Provider (QTSP) and part of the European Union’s critical digital infrastructure, and Vulsan X, a Government of Malaysia–licensed Managed Security Service Provider (MSSP), have officially signed a Memorandum of Understanding (MoU).


The signing ceremony took place at the Malaysian Pavilion and was witnessed by representatives from MDEC (Malaysia Digital Economy Corporation). This strategic partnership aims to strengthen international cybersecurity collaboration and enhance secure digital communications within Malaysia’s Critical National Infrastructure (CNI) sectors. SecuMailer is a leading European provider of secure, privacy- and cybersecurity-compliant email communication, recognized as part of the EU’s trusted digital ecosystem. As a certified QTSP, SecuMailer ensures legally reliable and compliant email delivery without passwords or attachments. Recipient authentication can be performed using national digital identity systems
at high eIDAS assurance levels.

Vulsan X delivers cybersecurity solutions to both government and enterprise clients in Malaysia and views SecuMailer as a complementary partner to strengthen its portfolio and elevate secure communication services. “We are proud to bring European trust infrastructure technology to the global stage and to collaborate with Vulsan X, who share our commitment to secure digital communication,” said Yvonne Hoogendoorn, Co-founder of SecuMailer.

“Through this partnership, we aim to deliver impactful cybersecurity solutions to Malaysia’s critical infrastructure clients, ensuring stronger protection of national digital assets,” said Dr. Prakash Christiansen, CEO of Vulsan X Corporation.

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