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Security report for neomutt.org

GKG.NET Domain Proxy Service · Technology · United States

Medium risk. 9 critical or high findings in Email security, Security headers and 2 other checks.

Security score

57/100

Risk levelMedium

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

NeoMutt.org is the official website for the NeoMutt project, an open-source command line mail user agent derived from Mutt with enhanced features. The project targets developers and users who prefer a powerful, customizable email client in a terminal environment. The website provides comprehensive documentation, community engagement channels including mailing lists, IRC, and GitHub repositories, and encourages contributions and sponsorships. The business model is community-driven open-source software with voluntary sponsorship support. Technically, the website employs a modern but lightweight tech stack including jQuery, Bootstrap, AnchorJS, and Algolia for search functionality. Hosting is inferred to be on Linode servers. The site is mobile responsive with good navigation and content structure, though accessibility features are basic. SEO is functional but could be improved with additional metadata and structured data. From a security perspective, the domain is registered via a privacy proxy service, which is common for open-source projects to protect personal information. The domain is mature and consistent with the project's timeline. However, the website lacks visible security headers, DNSSEC is not enabled, and no published security or incident response policies are found. HTTPS usage is assumed but not verifiable from the data provided. Privacy compliance is weak due to absence of privacy and cookie policies. Overall, NeoMutt.org is a trustworthy and professional open-source project website with good content quality and community engagement but could improve in privacy compliance and security best practices to enhance user trust and regulatory adherence.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 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

9 findings rated critical or high. Fix these first.

  1. Email security

    SPF, DKIM and DMARC stop others sending email that looks like it comes from your domain, a common route to phishing and invoice fraud.

    • Critical

      No email authentication configured

      Domain is vulnerable to email spoofing

      What to do: Implement SPF, DKIM, and DMARC immediately

  2. 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';…

  3. GDPR outside view

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

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

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

Keep watching neomutt.org

This scan found 28 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
62
Security headers
15
Email security
60
DNS health
70
Network security
100
GDPR outside view
35
Average
57

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

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention neomutt.org, from OffSeq Breach.

Total records
1
Employees
0
Customers
1
Third parties
0
Weak passwords
0%

1 subdomain affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for neomutt.org.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

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Technical appendix

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

Business context

Business profile

NeoMutt operates in the technology sector as a niche open-source software project focused on email client software. Its competitive advantage lies in its active development, community-driven contributions, and feature enhancements over the original Mutt client. Revenue streams are primarily through sponsorships and donations. The target customers are technically proficient users and developers who prefer command line tools. The project maintains a transparent development process via GitHub and community mailing lists, fostering collaboration and innovation. Partnerships are mainly community-based with no commercial subsidiaries or parent companies. Growth indicators include recent releases and active issue tracking. Strategic observations suggest focusing on improving privacy and security policies to align with broader compliance requirements and enhance user confidence.

Security posture

The website demonstrates a moderate security posture. The domain is protected against unauthorized transfers via clientTransferProhibited status but lacks DNSSEC, which could mitigate DNS spoofing risks. No security headers such as Content-Security-Policy or Strict-Transport-Security are detected, which are important for preventing common web attacks. The absence of a published security policy or vulnerability disclosure program limits transparency and incident response readiness. No forms collecting sensitive data are present on the homepage, reducing immediate risk exposure. Overall, the security maturity is moderate but could be significantly improved by implementing standard web security headers, enabling DNSSEC, and publishing security and incident response policies.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Implement essential HTTP security headers including Content-Security-Policy, X-Frame-Options, and Strict-Transport-Security.
  3. Publish a clear privacy policy and cookie policy to improve GDPR compliance and user trust.
  4. Develop and publish a security policy and vulnerability disclosure program to enhance transparency and incident response.
  5. Regularly audit and update third-party libraries to avoid vulnerabilities and improve technical implementation.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
GKG.NET Domain Proxy Service
Description
NeoMutt is a command line mail reader (Mail User Agent), a fork of Mutt with added features. It provides updated patches, documentation, and community support for users and developers.
Key services
Mail user agent software, Community support via mailing lists, IRC, GitHub, Documentation and guides, Source code hosting and issue tracking
Content quality
good
Branding
consistent

Technology

Stack
jQuery, Bootstrap, AnchorJS, Algolia Search, Hogan.js, Moment.js
Frameworks
Bootstrap
Performance
moderate
Mobile
good
Accessibility
basic
SEO
basic

Security

Observed score
60/100
Good practices seen
  • Domain status clientTransferProhibited to prevent unauthorized transfers

Analytics and tracking

Tracking level
minimal
Privacy practices
poor

Advertising

Marketing tools
Algolia Search
Transparency
poor

Site quality

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

Key observations

  1. Website is fully accessible with rich content about NeoMutt project.
  2. No privacy or cookie policies found, indicating potential compliance gaps.
  3. Contact information is limited but includes developer email and community channels.
  4. No security policy or incident response information published.
  5. No visible forms collecting personal data on the homepage.
  6. Use of modern JavaScript libraries and search integration via Algolia.
  7. No advertising or tracking detected beyond search functionality.
  8. Domain uses clientTransferProhibited status but lacks DNSSEC.
  9. Hosting inferred to be Linode based on nameservers.
  10. Content is technical and targeted at developers and users of command line mail clients.
Technical notes

Notes

The website uses a combination of jQuery, Bootstrap, and other JavaScript libraries such as AnchorJS and Algolia for search functionality, indicating a modern but not cutting-edge tech stack. Hosting is likely on Linode, a reputable VPS provider. The site is mobile responsive with good navigation and content structure. However, accessibility features are basic and SEO could be improved with additional metadata and structured data. Performance is moderate, with external dependencies on CDNs for scripts and fonts. There is no detected CMS, suggesting a custom or static site implementation. Technical risks include lack of security headers and missing DNSSEC, which could impact site security and user trust.
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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