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Security report for mailplus.nl

Spotler · Technology · Netherlands

Medium risk. 5 critical or high findings in Security headers and SSL/TLS.

Security score

73/100

Risk levelMedium

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

Spotler is a Dutch-based marketing software company specializing in user-friendly, data-driven marketing communication tools aimed at marketers. The company offers marketing automation and email marketing solutions, positioning itself as an established player in the marketing technology sector since its founding in 2014. The website demonstrates a mature digital presence with comprehensive SEO, structured data, and multi-language support, indicating a well-developed technical infrastructure. Security posture is solid with HTTPS, domain transfer protection, and cookie consent mechanisms, although there is room for improvement in DNSSEC and security headers. Overall, the site is professional, trustworthy, and compliant with GDPR, targeting marketing professionals primarily in the Netherlands. Strategic recommendations include enhancing security headers, publishing explicit security policies, and improving direct contact information visibility.

Scanned

This is an earlier scan of mailplus.nl. View the latest report

NIS2 and GDPR posture

GDPR outside view
83/ 100 · Low
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

5 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Strict-Transport-Security header

      Forces HTTPS connections

      What to do: Add "Strict-Transport-Security: max-age=31536000; includeSubDomains; preload"

      • CWE-319
      • OWASP A04:2025
      • ASVS V3.4.1
    • High

      Missing X-Frame-Options header

      Prevents clickjacking attacks

      What to do: Add "X-Frame-Options: DENY" or "X-Frame-Options: SAMEORIGIN"

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…

  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 Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1
    • 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

Need hands-on remediation? Email guard@offseq.com

Keep watching mailplus.nl

This scan found 20 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

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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
57
Security headers
25
Email security
80
DNS health
90
Network security
100
GDPR outside view
83
Average
73

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

Spotler operates in the technology sector providing SaaS marketing software solutions focused on data-driven marketing and email automation. The company targets marketing professionals and businesses seeking streamlined marketing communication tools. Its business model revolves around software subscriptions and marketing services. The company maintains a consistent brand image and leverages social media channels for engagement. The domain age and registration details align with the company's founding date, supporting legitimacy. The website's content quality and SEO optimization suggest a competitive market position with a focus on growth and customer engagement.

Security posture

The website employs HTTPS with a valid SSL certificate and domain transfer protection, indicating a baseline secure environment. Cookie consent is managed via Cookiebot, ensuring GDPR compliance. However, DNSSEC is not enabled, and no explicit security headers were detected in the provided data, which could enhance protection against common web attacks. No vulnerabilities or exposed sensitive data were identified. The absence of published security policies or incident response contacts suggests an area for improvement in transparency and readiness. Overall, the security posture is good but could be strengthened with additional best practices.

Recommendations

  1. Enable DNSSEC to improve domain name system security and prevent DNS spoofing.
  2. Implement and publish comprehensive security headers such as Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  3. Publish a dedicated security policy and incident response contact information to enhance transparency and trust.
  4. Improve visibility and availability of direct contact information including company emails and phone numbers for support and security reporting.
  5. Regularly audit third-party scripts and libraries to ensure no vulnerabilities or outdated components are present.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Spotler
Description
Spotler biedt marketeers gebruiksvriendelijke datagedreven marketingsoftware waarmee je eenvoudig al je doelgroepen bereikt.
Key services
marketingcommunicatie software, datagedreven marketingsoftware, email marketing automation
Content quality
excellent
Branding
consistent

Technology

Stack
Google Tag Manager, Cookiebot, FontAwesome, WordPress, Rank Math SEO
Frameworks
WordPress
Platforms
WordPress CMS
Performance
moderate
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
80/100
Good practices seen
  • HTTPS enabled
  • clientTransferProhibited domain status
  • cookie consent banner

Analytics and tracking

Services
Google Tag Manager
Tracking level
moderate
Privacy practices
good

Advertising

Tracking pixels
Cookiebot
Marketing tools
Spotler Subject Line Analyser, Rank Math SEO
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenge
  2. Comprehensive cookie consent and privacy mechanisms implemented
  3. No direct contact emails or phone numbers found on main page
  4. Strong SEO and structured data usage
  5. Use of modern marketing and analytics tools
  6. No explicit or adult content detected
  7. Domain registration and hosting details are consistent and trustworthy
Technical notes

Notes

The website is built on WordPress CMS with modern technologies including Google Tag Manager for analytics, Cookiebot for cookie consent management, and Rank Math for SEO optimization. The site uses FontAwesome for icons and AddToAny for social sharing. Hosting is supported by Cloudflare DNS services, providing performance and security benefits. The site is mobile-optimized with responsive CSS and good accessibility features. Performance is moderate with asynchronous loading of scripts. Structured data in JSON-LD format is well implemented, enhancing search engine visibility. There is no indication of technical debt or legacy technologies, suggesting a well-maintained infrastructure.
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

Earlier scans of this domain

  1. 72/100Medium29 findingsView report
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