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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Client trust, operational speed. No trade-offs.

Enable secure, provable, compliant email across real estate and housing workflows, while teams keep working in Outlook/Microsoft 365 or Google Workspace. No portals. No pick-up links. No “send securely” buttons. Integration with existing tools means legal teams can continue using familiar email platforms while maintaining full accountability and oversight. With SecuMailer, law firms and legal departments can focus on their cases, confident that every message is secure, verifiable, and compliant.
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Housing

The sector reality

  • Portfolios run on communication: leases and addenda, rent increases, reminders, , maintenance coordination and investor reports.

  • Everything must reach the right party, tenants, corporates, investors, municipalities, contractors, quickly, confidentially and with proof.

  • Regulations tighten, yet portals and extra steps slow operations, frustrate tenants and vendors, and drive risky workarounds.

The SecuMailer Approach

  • ✅ SecuMailer sits behind your existing mail.

  • ✅ Staff write and send as usual; in the background we apply policy, encryption, recipient assurance and legal evidence.

  • ✅ Messages land in the recipient’s normal inbox.

  • ✅Where higher assurance is required, policy triggers step-up verification (e.g., one-time code) or in-browser decryption after authentication

  • ✅ Delivery and access are logged; message bodies are removed after successful delivery to support data minimisation.

  • ✅ Result: high adoption with tenants and partners, without friction in your processes.

What This Enables

A new lease goes out encrypted by default and is read without a portal. Rent increases and payment reminders are sent at scale with auditable delivery. Notices and formal communications use eIDAS-qualified registered email from the same mailbox, recognised proof of dispatch and receipt, no paper or delays. Large files move via secure transfer with access control, expiry and recall. Your teams keep momentum; Compliance has the evidence it needs.

Pleadings encrypted by default.

HR/KYC documents securely shared.

eIDAS-registered email for notice-critical flows.

Secure large bundles (expiry, recall).

Interoperability, not silos

Exchange securely with counterparties and courts using other certified secure-mail solutions. Operate one platform internally while collaborating safely across the wider legal ecosystem.

Exchange securely with courts/counterparties using certified solutions.

Compliance, built-in / Compliance & governance

Protection is on by default and scales with risk, aligned to GDPR principles (integrity/confidentiality, privacy by design/by default, data minimisation, accountability). For notice-critical flows, eIDAS provides legally recognised evidence. Data sovereignty is standard: EU-hosted, operated by European providers. no hyperscaler dependency. Certifications/attestations (e.g., ISO 27001, SOC 2 Type 2) fit your ISMS, DPIAs and vendor reviews.

ISO_27001
ISO 27001 – International standard for information security management.
SOC2
ISAE 3000 / SOC 2 Type II – Assurance for security, availability, and privacy.
NEN 7510
NEN 7510 – Dutch standard for healthcare information security.
NTA
NTA 7516 is a Dutch standard for secure communication in healthcare, ensuring that sensitive patient information is transmitted securel
eIDAS (qERDS & qREMS) – EU qualified trust services, included in EU Trusted List.
ECSO
ECSO Label of Trustworthiness – Recognition by European Cyber Security Organisation.
A new marketing tool to promote European cybersecurity companies and increase their visibility on the European and on the global market.

For IT and Security

Happy user

  • ✅ Lightweight integration (SMTP, APIs, SAML/SSO).

  • ✅End-to-end transport/domain protections

    Technical implementation was completed in just one day.

  • ✅Intelligent DLP (block/alert).

    Intelligent DLP detects sensitive data and enforces policy automatically (require 2FA, block, alert) to prevent mis-sending

  • ✅ Logging is comprehensive and audit-ready.

    The platform scales to high volumes (campaigns, batch sends) and interoperates with other secure-mail solutions across your ecosystem (managers, housing associations, service partners).

What you see operationally

Less friction for tenants and vendors because messages arrive in the normal inbox. Fewer incidents thanks to consistent, automatic protection. Lower support load, no portals to explain or maintain. Stronger evidentiary position in disputes and audits. Above all: secure, compliant email that doesn’t slow real estate and housing operations.

Less friction for case teams/clients.

Lower incident risk.

Audit-ready evidence.

Secure, compliant email that maintains legal velocity.

Next step

Book a short walkthrough. We’ll map your email flows (tenant comms, legal, maintenance, finance, investor relations) to sector requirements and show exactly where SecuMailer reduces risk and effort, without changing how your teams work.
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Enthusiast