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Is thunderbird.net a Scam? Security Check Results - Mozilla Foundation Reviews

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Is thunderbird.net Safe? Security Analysis for Mozilla Foundation

Check if thunderbird.net is a scam or legitimate. Free security scan and reviews.

TechnologyN/alarge
JavaScriptSVGCSS3HTML5
Analyzed 9/5/2025Completed 7:08:04 PM
68
Security Score
MEDIUM RISK

AI Summary

Thunderbird is a free, open-source email and productivity application developed under the Mozilla Foundation umbrella. It offers desktop clients for Windows, Linux, and macOS, as well as a mobile app for Android. The website is professionally designed, multilingual, and provides clear navigation to products, resources, and community engagement. It supports donations and contributions, reflecting its open-source business model. The site leverages secure HTTPS connections and official download links, reinforcing trust and security. However, WHOIS data for the domain is unavailable, which is a minor concern but likely due to privacy or registry policies. Overall, Thunderbird holds a strong market position as a leading open-source email client with a large user base and community support.

Detected Technologies

JavaScriptSVGCSS3HTML5

🧠AI Business Intelligence

Technology stack, business insights, and market analysis powered by AI.

Business Intelligence

Market & Strategic Analysis

Thunderbird operates as an important entity within the technology sector, focusing on open-source software distribution. Its business model relies on community engagement, donations, and partnerships under the Mozilla Foundation. The target audience includes general users seeking a free, customizable email client with productivity features. The website's multilingual support and clear calls to action for downloads and donations indicate a mature digital presence. The partnership with Mozilla and use of official domains enhance credibility. No direct revenue streams are visible on the site, consistent with open-source funding models. The ecosystem includes support forums, blogs, and contribution channels, fostering user involvement and growth.

Security Posture Analysis

Comprehensive Security Assessment

The website demonstrates a good security posture with enforced HTTPS, modern security headers, and secure download links. No exposed sensitive data or vulnerable scripts were detected in the HTML content. However, explicit security policies, incident response contacts, and vulnerability disclosure mechanisms are not publicly available, which could be improved to enhance transparency and trust. The absence of a security.txt file or dedicated security page limits direct communication channels for security issues. Overall, the site follows best practices for web security but could benefit from more explicit security governance documentation.

Strategic Recommendations

Priority Actions for Security Improvement

1

Publish a dedicated security policy and incident response page to improve transparency.

Observations

AI-powered comprehensive website and business analysis.

AI-Enhanced Website Analysis

Business Insights

Company:

Mozilla Foundation

Description:

Thunderbird is a free email application that’s easy to set up and customize - and it’s loaded with great features!

Key Services:
Email client software for desktop (Windows, Linux, macOS)Mobile email app for AndroidSupport and community resourcesDonation and contribution opportunities
Content Quality:

excellent

Branding:

consistent

Technical Stack

Technologies:
JavaScriptSVGCSS3HTML5
Platforms:
WindowsLinuxmacOSAndroid
Performance:

fast

Mobile:

excellent

Accessibility:

good

SEO:

good

Security Assessment

Security Score:
90/100
Best Practices:
  • HTTPS enforced
  • Use of security headers
  • No exposed sensitive data in HTML
  • Secure download links with SSL

Analytics & Tracking

Tracking Level:minimal
Privacy Compliance:good

Advertising & Marketing

Ad Networks:
Fundraise Up
Tracking Pixels:
Fundraise Up
Marketing Tools:
Fundraise Up
Transparency Level:good

Website Quality Assessment

Design Quality:excellent
User Experience:excellent
Content Relevance:excellent
Navigation Clarity:excellent
Professionalism:excellent
Trustworthiness:high

Key Observations

1

Website is fully accessible with rich content and professional design.

🛡️Security Headers

HTTP security headers analysis and recommendations.

Security Headers

HTTP security headers analysis

45/100
Score

Missing X-Content-Type-Options header

MEDIUM

Prevents MIME type sniffing

Missing Content-Security-Policy header

HIGH

Controls resources the browser is allowed to load

Missing X-XSS-Protection header

MEDIUM

Legacy XSS protection (deprecated but still recommended)

Missing Referrer-Policy header

LOW

Controls referrer information sent with requests

Missing Permissions-Policy header

MEDIUM

Controls browser features and APIs

Sensitive data may be cached

LOW

Cache-Control header should include "no-store" for sensitive pages

👤GDPR Compliance

Privacy and data protection assessment under GDPR regulations.

GDPR Compliance

Privacy and data protection assessment

68/100
Score

No Cookie Consent Banner found

HIGH

GDPR requires explicit consent for non-essential cookies

No Data Protection Officer mentioned

LOW

Large organizations may need to designate a DPO under GDPR

Privacy policy may not be GDPR compliant

MEDIUM

Privacy policy lacks explicit GDPR compliance elements

GDPR Compliance Analysis

Privacy Policy85% confidence
Cookie Policy85% confidence
Contact Information Found90% confidence
emailphone

🛡️NIS2 Compliance

Network & Information Security Directive compliance assessment.

NIS2 Compliance

Network & Information Security Directive

2/100
Score

No information security framework found

HIGH

NIS2 requires documented cybersecurity and information security measures

No vulnerability disclosure policy

MEDIUM

NIS2 encourages coordinated vulnerability disclosure

No security policy documentation found

HIGH

NIS2 requires documented cybersecurity governance and risk management

No incident response procedures found

HIGH

NIS2 requires documented incident response and business continuity plans

No business continuity planning found

MEDIUM

NIS2 emphasizes operational resilience and business continuity

No security contact information

HIGH

NIS2 requires clear incident reporting channels

No vulnerability reporting mechanism

MEDIUM

Clear vulnerability reporting supports coordinated disclosure

No NIS2 reference found

LOW

Consider explicitly mentioning NIS2 compliance efforts

Critical sector without clear security compliance

HIGH

Detected sectors: energy, transport, digital

📧Email Security

SPF, DKIM, and DMARC validation and email security assessment.

Email Security

SPF, DKIM, and DMARC validation

85/100
Score

No BIMI Record

LOW

BIMI displays brand logos in email clients

No MTA-STS Policy

MEDIUM

MTA-STS enforces TLS for email delivery

No TLS-RPT Record

LOW

TLS-RPT provides reporting for email TLS issues

SPF
Sender Policy Framework
DKIM
DomainKeys Identified Mail
DMARC
Domain-based Message Authentication
MX Records
Mail Exchange Records
BIMI
Brand Indicators
MTA-STS
Mail Transfer Agent Security
TLS-RPT
TLS Reporting
DNSSEC
DNS Security
SPF Details
Record:
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.messagingengine.com include:spf.fundraiseup.com include:servers.mcsv.net ~all
DNS Lookups:4/10
Policy:~all
DKIM Selectors Found
Selector:google(1416-bit rsa)
Selector:k1(1296-bit rsa)
Selector:k2(1416-bit rsa)
Selector:dkim(1296-bit rsa)
DMARC Details
Policy:reject
Aggregate Reports:dmarc_agg@vali.email
Forensic Reports:sancus@thunderbird.net

🏆SSL/TLS Security

Certificate validity and encryption analysis.

SSL/TLS Security

Certificate validity and encryption analysis

75/100
Score

SSL Certificate Expires Within 90 Days

MEDIUM

SSL certificate expires in 81 days

Weak SSL Key Length

HIGH

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

Partial SSL/TLS Assessment

LOW

Completed 2 of 4 security checks due to time constraints

Certificate Details

Subject:thunderbird.net
Issuer:WE1
Valid Until:11/26/2025 (81 days)
SANs:thunderbird.net, *.thunderbird.net

OCSP Status

OCSP Stapling Disabled

📊DNS Health

DNS configuration and security assessment.

DNS Health

DNS configuration and security assessment

85/100
Score

DNSSEC Not Enabled

MEDIUM

DNSSEC is not configured for this domain

CAA Records Not Configured

LOW

Certificate Authority Authorization (CAA) records not found

Domain Registration Details

Domain Age
23 years(mature)
Expiry Risk
none(629 days)
Protection Level
strongDNSSEC OFF

DNS Records

A Records:104.26.3.27, 172.67.74.82, 104.26.2.27
AAAA Records:2606:4700:20::681a:31b, 2606:4700:20::ac43:4a52, 2606:4700:20::681a:21b
Name Servers:
kia.ns.cloudflare.com
nick.ns.cloudflare.com
MX Records:
1: aspmx.l.google.com
10: alt3.aspmx.l.google.com
10: alt4.aspmx.l.google.com
5: alt1.aspmx.l.google.com
5: alt2.aspmx.l.google.com
SOA:Serial: 2381858842, TTL: 1800s

DNSSEC Status

DNSSEC Not Enabled

DNS Performance

Resolution Time:54ms

SPF Analysis

SPF Record:
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:spf.messagingengine.com include:spf.fundraiseup.com include:servers.mcsv.net ~all

Network Security

Port scanning and network exposure analysis.

Network Security

Port scanning and network exposure analysis

100/100
Score

Good Network Security Posture

LOW

No unnecessary services detected on common risky ports

🔧Technical Analysis

Detailed technical findings and analysis from AI assessment.

Technical Analysis

Comprehensive security assessment findings

Additional Findings

The website uses a modern tech stack including JavaScript, SVG graphics, and CSS3 for styling. It supports multiple platforms with dedicated download links for Windows, Linux, macOS, and Android. The site is well-optimized for mobile devices and accessibility, with good SEO practices including meta tags and hreflang attributes for internationalization. Performance appears fast with preloading of scripts and images. No CMS was detected, suggesting a custom or static site architecture. Hosting provider details are not explicit but the site uses secure HTTPS and CDN resources. The technical implementation is robust and supports a high-quality user experience.
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