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Security report for open-xchange.com

Open-Xchange · Technology · N/a

Medium risk. 3 critical or high findings in GDPR outside view and SSL/TLS.

Security score

72/100

Risk levelMedium

0–100, higher is better. How it is calculated

Open-Xchange is a leading global provider of open and trusted software solutions primarily focused on email platforms for service providers, telcos, and hosters. With over 220 million users, it holds a strong market position as the largest independent email provider worldwide. Their product portfolio includes cloud and on-premises email solutions, DNS products, and IMAP server platforms, targeting enterprise and public sector customers. The website reflects a mature digital presence with comprehensive content, professional design, and clear navigation.

Scanned

NIS2 and GDPR posture

GDPR outside view
43/ 100 · High
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

3 findings rated critical or high. Fix these first.

  1. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  2. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak SSL Key Length

      SSL certificate uses 256-bit key, which is considered weak

      What to do: Use at least 2048-bit RSA or 256-bit ECC key

      • CWE-326
      • OWASP A04:2025
      • Mozilla TLS: Mozilla Server Side TLS 6.0 intermediate: rsa_key_size 2048

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Keep watching open-xchange.com

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
72
Security headers
60
Email security
72
DNS health
85
Network security
100
GDPR outside view
43
Average
72

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

The company operates a flexible business model allowing service providers to tailor premium email experiences and monetize through upselling features. Partnerships with major players like IONOS, Rackspace, and GoDaddy demonstrate strong industry relationships and customer trust. The use of HubSpot CMS and marketing tools indicates a sophisticated approach to lead generation and customer engagement. The presence of multiple case studies and trust signals supports a credible and growth-oriented business strategy.

Security posture

Open-Xchange demonstrates a solid security posture with HTTPS enforced via TLS 1.3 and 1.2, valid SPF and DMARC records with a reject policy, and OCSP stapling enabled. However, the absence of DNSSEC and CAA records suggests room for improvement in domain security. The website lacks HSTS enforcement and a published security.txt file, which are recommended best practices. Incident response contact channels are clearly provided, enhancing trust and readiness. Overall, the security configuration is good but could be enhanced with additional domain and transport security measures.

Recommendations

  1. Enable HSTS with includeSubDomains and preload to strengthen HTTPS enforcement.
  2. Implement DNSSEC and CAA records to improve domain name system security.
  3. Publish a security.txt file to facilitate vulnerability disclosure and improve transparency.
  4. Enhance accessibility features to meet compliance standards and improve user experience.
  5. Continue to maintain and update privacy and cookie policies to ensure ongoing GDPR compliance.
Technical notes

Notes

The website is built on HubSpot CMS, leveraging modern JavaScript libraries such as jQuery, Fancybox, and Slick Carousel for UI enhancements. Performance is moderate with a page load time of approximately 6 seconds and a page size of ~83 KB, which is acceptable but could be optimized. The DNS is managed by EasyDNS without DNSSEC enabled. SSL configuration is strong with no known vulnerabilities detected. The site is mobile optimized with responsive design and good SEO metadata. Technical debt appears low, but improvements in DNS security and performance optimization could further enhance reliability and user experience.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

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