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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Send and receive files up to 5TB securely and compliantly, while staying fully in control

With the SecuFiler app, you can easily and securely exchange one or more files.

When handling financial, medical, or legal data, secure file transfer isn’t optional, it’s essential. You can’t afford to lose, leak, or mishandle it. SecuFiler is built for that. It lets you send and receive files up to 5TB securely, with all data processed exclusively in Europe, and in compliance with EU regulations including NTA 7516, GDPR, NIS2, and eIDAS.

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Quarantine mail

Full data sovereignty

Files shared through SecuFilter are encrypted, stored temporarily, and hosted securely within the Netherlands. No external services, no uncontrolled cloud — just total control over your data.

Beyond attachments

Stop sending sensitive files as risky email attachments. With SecuFilter, you share via encrypted links with strict access controls, download limits, and expiration settings. You stay in control, even after sending.

Compliant by design

SecuFilter ensures secure file exchange, complying with GDPR, NTA 7516, and sector-specific rules. It's perfect for legal, financial, and medical data, all without sacrificing ease-of-use.

Why Secumailer

To exchange files without compromising security and compliancy.

In most cases, it’s not possible to send or receive files over 25 MB by email. That’s why users turn to unsecured third-party platforms, which can lead to uncontrolled access and serious compliance risks. SecuFiler keeps the file exchange process within your secure infrastructure,  your file stays yours, with you in full control.

  • Send securely from your trusted environment (email or WebApp)

    Keep sensitive messages safe without leaving your familiar tools.

  • Receive files from your clients through your own branded upload page

    Collect documents effortlessly while maintaining your brand identity.

  • Add optional 2FA for medical and legal-grade protection

    Enhance security with two-factor authentication for maximum data protection.

  • Process data exclusively within the EU for full compliance assurance

    Ensure your information stays fully compliant with EU regulations.

  • Stay in control with expiry dates, recall options, and complete auditability from start to finish

    Manage every file securely with full oversight and traceability.

How registered mail with SecuMailer works

Send and receive in 3 simple steps
Step 1

Enter sender and recipient emails

Start by entering your own email address and that of the intended recipient. This step initiates the secure delivery process and ensures the system knows who is sending and receiving the files.

Step 2

Select files to send

Choose one or more files to share, up to a total size of 5TB. SecuFilter supports a wide range of file types, including documents, photos, videos, and more.

Step 3

Recipient receives a secure download link

The recipient gets an email with a unique, encrypted download link. After authentication, they can access and download the files safely — without installing software or creating an account.

Note: Receiving files is just as simple — users upload documents via your branded SecuFilter web page following a similar 3-step process.

Want more technical detail?

Explore our documentation

SecuFiler’s Features

The features of SecuFiler complement the features of SecuMailer.

Integrate SecuFiler as a page on your organization’s website. Through this page, your customers can easily send all confidential documents securely to your organization.

Send one or multiple files at a time up to a total size of 5TB. This is equivalent to approximately 1,250,000 high-resolution photos, so in almost all cases, it’s more than enough!

With SecuFiler, you can easily send a wide range of file types. It’s possible to send all common file types, not just PDFs, but also documents, photos, and videos.

With the SecuFiler Link Wizard, you can generate a pre-filled link to share with your customer. Your customer only needs to select the files and click send.

Do you want the recipient to undergo additional authentication? This can be done by performing an extra 2FA, making the large file fully NTA 7516-compliant. Therefore, it is highly suitable for medical and legal information.

Trusted by regulated sectors

Municipalities

Municipalities

Formal decisions, objection procedures

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Health-Care

Healthcare providers

Medico-legal communications.

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Finance

Legal professionals

Contracts, notarial deeds

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Legal

Financial institutions

Audit-proof delivery.

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Government

Education & regulators

Certified communication

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Ready to share large files the secure way?

With SecuFiler, you ensure that your privacy-sensitive documents are delivered securely to the recipient, while you remain in full control.

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See how easy secure emailing can be
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