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Security report for tempmail3.com

TempMail · Technology · N/a

Medium risk. 8 critical or high findings in Email security, Security headers and 2 other checks.

Security score

60/100

Risk levelMedium

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

TempMail3.com is a recently established online service (2025) offering free, anonymous, and secure temporary email addresses to help users protect their real inboxes from spam and maintain privacy. The service operates without requiring user sign-up, providing instant disposable email addresses that auto-delete after a short period. Supported by advertising revenue, the website targets general internet users seeking quick and hassle-free disposable email solutions. Technically, the site is built on modern frameworks such as Next.js and React, hosted behind Cloudflare DNS, and optimized for performance and mobile responsiveness. Security posture is adequate with HTTPS enforced and domain transfer protection, but lacks DNSSEC and explicit security headers like CSP. Privacy compliance is basic with visible privacy and cookie policies and GDPR consent mechanisms. No direct contact information or advanced security policies are published, which limits transparency. Overall, the domain registration and website content are consistent and legitimate, positioning TempMail3 as a trustworthy player in the disposable email market.

Scanned

NIS2 and GDPR posture

GDPR outside view
65/ 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

8 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 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 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

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

Keep watching tempmail3.com

This scan found 26 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
54
Security headers
30
Email security
40
DNS health
70
Network security
100
GDPR outside view
65
Average
60

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

TempMail3 operates in the technology sector providing disposable email services, a niche with growing demand due to privacy concerns and spam proliferation. The business model is free-to-use supported by Google Adsense and other ad networks. The website demonstrates consistent branding and user testimonials, enhancing credibility. The lack of direct contact info and certifications suggests a small-sized operation focused on service delivery rather than corporate scale. The service appeals broadly to privacy-conscious users, developers, marketers, and testers. The domain age aligns with the claimed launch year, indicating a new but professionally managed service. The advertising and analytics ecosystem is standard for free online services, with moderate user tracking. No partnerships or subsidiaries are identified.

Security posture

The website enforces HTTPS and uses reputable DNS hosting via Cloudflare, with domain status clientTransferProhibited to prevent unauthorized transfers. However, DNSSEC is not enabled, which is a recommended security enhancement. No explicit Content-Security-Policy or other advanced security headers were detected, which could mitigate risks like cross-site scripting. The site does not publish a security policy, incident response plan, or vulnerability disclosure program, limiting transparency and readiness for security incidents. No contact channels for security issues (e.g., security@ or abuse@ emails) are provided. The auto-deletion of emails and no personal data collection are positive privacy and security practices. Overall, the security posture is moderate but could be improved with additional policies and technical controls.

Recommendations

  1. Enable DNSSEC on the domain to enhance DNS security and prevent spoofing.
  2. Publish a security.txt file and vulnerability disclosure policy to improve transparency and incident handling.
  3. Implement and enforce Content-Security-Policy and other security headers to mitigate common web vulnerabilities.
  4. Provide clear contact channels for security incidents and abuse reporting.
  5. Enhance privacy compliance by detailing data retention policies and user rights more explicitly.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
TempMail
Description
Temp Mail provides free, anonymous, and secure temporary email addresses instantly without sign-up, helping users protect their inbox from spam and maintain privacy.
Key services
Temporary email address generation, Instant email reception, Auto-deletion of emails, Spam protection
Content quality
good
Branding
consistent

Technology

Stack
Next.js, React, Google Fonts, Google Adsense, Cloudflare DNS
Frameworks
Next.js, React
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
75/100
Good practices seen
  • HTTPS enforced
  • ClientTransferProhibited domain status
  • No personal data collection on site
  • Auto-deletion of emails to protect privacy

Analytics and tracking

Services
Google Analytics, Google Tag Manager
Tracking level
moderate
Privacy practices
basic

Advertising

Ad networks
Google Adsense, Revenue CPM Gate
Tracking pixels
Google Analytics (gtag.js)
Transparency
basic

Site quality

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

Key observations

  1. Website is a legitimate disposable email service launched recently.
  2. No contact emails or phone numbers publicly listed.
  3. Privacy and cookie policies are present and GDPR compliant.
  4. Advertising is present but from reputable networks.
  5. No advanced security policies or incident response info published.
  6. No suspicious or malicious content detected.
  7. Good technical implementation with modern frameworks.
Technical notes

Notes

The website is built using Next.js and React frameworks, leveraging Google Fonts and Google Adsense for typography and monetization respectively. Hosting and DNS are managed via Cloudflare, providing performance and security benefits. The site is mobile-optimized with responsive design and good accessibility features. Performance is fast with preloading of fonts and images. SEO is supported by proper meta tags and canonical URLs. No CMS detected, indicating a custom or framework-based build. Some third-party scripts for ads and analytics are present, which introduce moderate user tracking. No critical technical debt or outdated libraries were identified. Opportunities exist to improve security headers and implement DNSSEC for enhanced protection.
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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