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Security report for 126.com

网易公司 · Technology · China

Medium risk. 7 critical or high findings in SSL/TLS, Security headers and 1 other check.

Security score

50/100

Risk levelMedium

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

NetEase's 126.com is a well-established Chinese free email service platform with over 20 years of operational experience. It offers professional email services including support for large attachments and cloud storage, complemented by a dedicated official app for multi-platform access. The website targets a broad audience of internet users seeking reliable and secure email solutions in China. The business model combines free email services with premium VIP and membership offerings, positioning itself as a leading player in the Chinese email market. The domain's long history and consistent registration details reinforce its legitimacy and market presence. Technically, the website employs modern web technologies such as service workers and fingerprinting libraries to enhance user experience and security. The infrastructure appears robust with multiple content delivery domains within the NetEase ecosystem. Performance is moderate with good mobile optimization and basic accessibility features. SEO practices are adequate, supported by comprehensive meta tags and preconnect optimizations. From a security perspective, the site enforces HTTPS and uses domain status locks to prevent unauthorized domain changes. However, DNSSEC is not enabled, and security headers are not explicitly observed, indicating room for improvement. Privacy compliance is partial; while privacy and terms of service documents are present, cookie consent mechanisms and explicit GDPR compliance indicators are lacking. No direct contact or incident response information is provided, which could be enhanced to improve trust and compliance. Overall, 126.com is a credible and professional email service with strong business credibility and technical maturity. Strategic improvements in security policies, privacy compliance, and accessibility would further strengthen its position and user trust.

Scanned

NIS2 and GDPR posture

GDPR outside view
50/ 100 · Medium
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

7 findings rated critical or high. Fix these first.

  1. 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.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  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 126.com

This scan found 23 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

€25per month

  • 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
0
Security headers
15
Email security
55
DNS health
80
Network security
100
GDPR outside view
50
Average
50

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 126.com, from OffSeq Breach.

Total records
298,423
Employees
3,497
Customers
34,498
Third parties
260,428
Weak passwords
28%

Latest record dated 2026-06-18 · 102 subdomains 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 126.com.

Select it in the checkout above.

Masked preview

  • –126.com2026-06-18
  • –passport.126.com2026-06-18
  • –passport.126.com2026-06-18
  • –passport.126.com2026-06-18
  • –passport.126.com2026-06-16

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

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

126.com operates under NetEase, a major Chinese technology company, providing free and premium email services. Its market positioning is strong within China, leveraging brand recognition and a large user base. The business model includes free email accounts supplemented by VIP and membership tiers, generating revenue through value-added services. The target customers are general internet users and businesses requiring reliable email solutions. The ecosystem includes related domains for VIP mail, enterprise mail, overseas login, and support, indicating a comprehensive service offering. Growth is supported by mobile app integration and continuous platform enhancements. Partnerships appear internal within NetEase's domain portfolio, with no external third-party partners explicitly identified in the content.

Security posture

The website demonstrates a moderate to good security posture with enforced HTTPS and domain registration protections. The use of service workers and fingerprinting indicates attention to security and user experience. However, the absence of DNSSEC and missing security headers such as Content-Security-Policy or X-Frame-Options are notable gaps. No explicit security policy or incident response contacts are published, limiting transparency. Privacy compliance is basic, lacking cookie consent banners and GDPR-specific disclosures. No vulnerabilities or exposed sensitive data were detected in the provided content. Overall, the security maturity is adequate for a large enterprise but could benefit from enhanced transparency and technical controls.

Recommendations

  1. Enable DNSSEC on the domain to improve DNS security and prevent spoofing.
  2. Implement and publish comprehensive security headers (CSP, X-Frame-Options, HSTS) to harden the web application.
  3. Add a cookie consent mechanism to comply with privacy regulations and improve user trust.
  4. Publish a dedicated security policy and incident response contact information to enhance transparency and readiness.
  5. Improve accessibility features to meet modern standards and broaden user inclusivity.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
网易公司
Description
网易126免费邮箱–你的专业电子邮局，超过20年的邮箱运营经验，系统快速稳定安全，支持超大附件和网盘服务。网易邮箱官方App“邮箱大师”帮您高效处理邮件，支持所有邮箱，并可在手机、Windows和Mac上多端协同使用。
Key services
免费电子邮箱, 超大附件支持, 网盘服务, 邮箱大师App多端协同
Content quality
good
Branding
consistent

Technology

Stack
JavaScript, Service Workers, FingerprintJS, MailStats SDK, Polyfill ES5
Platforms
Web, Mobile App (iOS/Android), Windows, Mac
Performance
moderate
Mobile
good
Accessibility
basic
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • Multiple domain status prohibitions (clientDeleteProhibited, clientTransferProhibited, etc.)
  • Service Worker usage for offline and performance

Analytics and tracking

Services
MailStats
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
mailad-sdk
Tracking pixels
mailstats-sdk
Marketing tools
mailad-sdk, mailscanlogin
Transparency
basic

Site quality

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

Key observations

  1. Website is a professional, enterprise-grade email service platform operated by NetEase.
  2. Content is fully accessible with no blocking or WAF challenges.
  3. Strong branding and consistent user interface in Chinese language.
  4. Multiple external domains are used for content delivery and services, all related to NetEase ecosystem.
  5. No explicit privacy or cookie consent mechanisms visible, which may impact GDPR compliance.
  6. Security practices are good but could be improved with DNSSEC and explicit security headers.
  7. No direct contact emails or phone numbers found on the main page.
  8. No social media links detected in the provided content.
  9. Website uses modern JavaScript technologies and service workers for enhanced user experience.
Technical notes

Notes

The website uses a modern JavaScript-based front end with service workers for offline capabilities and performance improvements. It leverages fingerprinting libraries for user identification and tracking, and integrates analytics via MailStats. The infrastructure is distributed across multiple NetEase-owned domains, indicating a well-managed content delivery network. Performance is moderate, with some fallback mechanisms for slow loading detected. The site is mobile optimized and supports multi-platform access via dedicated apps. No CMS is explicitly detected, suggesting a custom-built platform. Technical debt appears low, but improvements in security headers and privacy mechanisms are recommended to align with best practices.
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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