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Domain Due Diligence
Report for Thunderbird.net

Report Date January 26, 2026
Recommendation
Proceed
Overall Summary
Safe
Why we think so

Thunderbird.net hosts Mozilla Thunderbird, a widely-used free email client known for customization and multi-account support. The domain ranks around #29,500 globally, with 2.1 million monthly visits, mainly from Japan, Germany, and the US. Technical infrastructure is robust, using CloudFlare and Google services, and the site is well-maintained with valid SSL and WHOIS registration by Mozilla Corporation since 2002. No scam or phishing flags appear on major blacklists. User reviews note some reliability and usability issues but appreciate Thunderbird's features and free access. Recent news confirms ongoing development and official releases.

Confidence Score
93%

Risk Insights

🛡️

Established and trusted domain

Registered since 2002 to Mozilla Corporation
Current SSL certification valid and secure
Stable DNS and infrastructure with CloudFlare
✅

High traffic and authentic usage

Over 2 million visits monthly from diverse countries
Primary traffic via direct and search sources
No known blacklists or scam reports attached
⚠️

User reports focus on software issues, not fraud

Common complaints include email retrieval and UI quirks
No scams or phishing detected from the official domain
Support mainly through community forums

Contradictory Signals

While the site itself is legitimate, users should be aware of potential software limitations.

Signal A: No scam or blacklist flags detected

Signal B: Some user complaints about software reliability and performance

Category Scores

Identity 95/100
Reputation 90/100
Technical 95/100
Content 85/100
Legal 90/100
Business Validity 95/100

Red Flags & Warnings

  • User reviews mention occasional email retrieval failures, performance slowdowns, and limited official support.

🔎 Detailed Checks & Analysis

Domain Registration and Ownership Verification

Score: 95/100
Passed

"Ownership is consistent and WHOIS records show no suspicious changes or privacy masking."

Reason: The domain thunderbird.net is registered to Mozilla Corporation, a reputable organization, since 2002 with up-to-date WHOIS info.

Traffic and Popularity Analysis

Score: 90/100
Passed

"Traffic sources are mostly direct and search-based, typical for an established software site."

Reason: With over 2 million monthly visits and a global rank near 29,500, the site is well-trafficked, indicating legitimate use.

Blacklist and Scam Detection

Score: 100/100
Passed

"Absence on these lists supports the domain's trustworthiness."

Reason: Google Safe Browsing and crypto scam databases list no threats associated with thunderbird.net.

Business Contact and Social Proof

Score: 85/100
Passed

"Social channels are active and connect to recognized entities."

Reason: The domain provides valid contact emails and official social media accounts linked to the Thunderbird project.

Trademark and Legal Status

Score: 90/100
Passed

"No lawsuits or legal disputes linked to thunderbird.net found."

Reason: USPTO trademarks named Thunderbird are mostly unrelated or inactive, with no conflicts to Mozilla Thunderbird brand.

User Feedback and Support Quality

Score: 70/100
Passed

"Complaints are about reliability and UI but no fraud claims or scam behavior."

Reason: Users report some technical issues with the Thunderbird software, typical for free open-source projects without formal support.

Your Next Steps

  • 1
    Download Thunderbird software only from the official website thunderbird.net or verified Linux repositories to avoid ransomware scams.
  • 2
    Verify SSL validity and domain registration info when accessing the site for added security reassurance.
  • 3
    Check user forums and official support for troubleshooting reported reliability issues if using the email client.
  • 4
    Be cautious of third-party sites claiming to offer Thunderbird downloads; these may include malware.

Evidence & Citations

🕵🏻 Keep investigating

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