REST API

Developer portal ›

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.

Get a Demo

Name(Required)

Contact Sales

Your Name(Required)

Send millions of secure emails with confidence

How GGD GHOR scaled up to 1 million secure emails per day—compliant, fast, and effortless.

At the height of the pandemic, GGD GHOR needed a secure way to deliver millions of test results to citizens—fast. With SecuMailer’s secure mail merge, they were able to deliver over 50 million secure emails while staying fully compliant with strict healthcare and privacy regulations.

Get a Demo
Contact Sales
1 Million

The Challenge

  • Urgent need to scale communication
  • Up to 1 million secure emails per day needed—mostly to private individuals
  • Medical data must be sent securely and meet NTA 7516 standards
  • Automated communication flow, no manual intervention
  • Easy to use for a wide audience, including less tech-savvy citizens
  • Full compliance with GDPR


The Solution

  • Fully automated secure email infrastructure from SecuMailer
  • Two-factor authentication via SMS for message access
  • Mail merge capability to send unique, personalized emails
  • No portal, no passwords—just seamless delivery to inboxes
  • EU-hosted, fully encrypted, and standards-compliant
  • Rapid implementation and immediate scalability

The Result

  • No data leaks
  • No security incidents
  • No impact on the service desk
  • Over 50 million secure emails sent with no breaches
  • Fully automated process with zero impact on staff workload
  • Real-time delivery, easy to open—even for less digital-savvy citizens

Secure Mailing is Essential

Mail Merge

For us as BVCM, secure and reliable communication is essential. Every day we send sensitive information to customers, debtors and courts. We wanted to make sure that our emails are not only sent securely, but also guaranteed to arrive. In the debt collection industry, trust is crucial: customers count on us to keep agreements made and that communication with debtors actually takes place. This requires a solution that not only guarantees security but also provides insight into any delivery problems.

The impact of changing legislation

In addition, the changing legislation surrounding digital communication with courts played a major role. Our Proceedings & Executions Department had to comply with new requirements, in which secure and legally valid e-mailing became an absolute necessity. We were looking for a solution that supported both our operational processes and legal requirements, without any additional burden on our employees.

The search for the right solution

In our search for a partner, we looked at several options, but SecuMailer stood out immediately. “We talked to three parties who offered a similar solution, but SecuMailer stood out from the rest. The conversations were effortless, the knowledge was ample and the response time to questions was excellent.” The solution matched our needs perfectly and offered a good balance between security and ease of use.

Smooth implementation

The implementation went smoothly. Everything was clearly explained in advance, and SecuMailer carefully guided the process. Within a short time, the solution was operational, with no impact on our daily work. Meanwhile, more than 100 employees from various departments use SecuMailer, including our collection department, outsourcing teams and our collection application CollectOnline.

Registered mail

In addition to secure emailing with SecuMailer, we also use a new product they offer: eIDAS registered mail. The long process of sending registered letters has now been digitally replaced, saving us an enormous amount of time and costs. As a result, we no longer have to worry about the reliability and legality of our communications.

Reliability and consistency

What we appreciate most is the reliability and consistency of the solution. We don’t have to worry about the security of our communications, while our employees can continue to work as usual. “SecuMailer gives us a comfortable pillow that we sleep soundly on, knowing that our email security is well taken care of.” In addition, we experience the cooperation as a true partnership. SecuMailer actively thinks with us, comes up with suggestions and provides support that goes beyond just answering questions.

With SecuMailer, we not only have our e-mail security in order, but also the assurance that our communications are running smoothly and efficiently. That gives us the peace of mind to focus fully on our core business.

In just two months, we delivered 3 million secure emails. It worked seamlessly—and even citizens unfamiliar with digital tech had no problems accessing their results.
In just two months, we delivered 3 million secure emails. It worked seamlessly—and even citizens unfamiliar with digital tech had no problems accessing their results.
In just two months, we delivered 3 million secure emails. It worked seamlessly—and even citizens unfamiliar with digital tech had no problems accessing their results.
– Project Team GGD GHOR & Commercial Covid Test Sites

Implementation Facts

  • Fully automated infrastructure

  • Personalized message generation without manual input

  • Every email protected with SMS code

  • Ensures access only by intended recipient

  • All infrastructure within EU

  • No data storage in portals

  • End-to-end encryption throughout

  • Capable of handling up to 1 million emails per day

  • Deployed rapidly during national health emergency

Scaling Secure Communication for the Future

With proven performance at national scale, SecuMailer’s secure mail merge is now positioned as a default solution for mass secure communications. From vaccination invites to critical healthcare messages, more public institutions are looking to adopt this reliable, standards-compliant communication method.

As healthcare and government sectors increase digital engagement, automated secure communication becomes mission-critical—and SecuMailer is ready to meet that need.

Need to send secure emails at scale?

Whether you’re a healthcare provider, government agency, or organization handling sensitive data—SecuMailer helps you deliver secure, personalized emails with ease. Fully automated, privacy-compliant, and scalable to millions.

Get a Demo
Contact Sales