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Domain Due Diligence

Report for Posteo.de

Report Date
October 28, 2025
Recommendation
Proceed
Overall Summary
Safe
  Why we think so? 

Posteo.de is an established, privacy-focused email provider based in Germany. It has a strong reputation with about 5.3 million monthly visits, mainly from German-speaking countries. The service emphasizes sustainability, encryption, and ad-free email. Domain security standards are good, and there are no reports of scams, fraud, or legal issues tied to this domain.

Confidence Score
90%

Risk Insights

📈

Strong User Base and Traffic

  • About 5.3 million visits per month
  • Mostly from Germany, Austria, and Switzerland
  • Consistent global traffic rank near 10,768
🛡️

Verified Secure Domain

  • Active valid SSL certificate issued in 2025
  • Well-distributed DNS servers globally
  • No expiry or security alerts
✅

Reputable, Privacy-Focused Email Service

  • Longstanding service since 2009
  • Positive independent reviews emphasize privacy
  • No confirmed scam or fraud reports

Contradictory Signals

While the absence of a strict DMARC policy theoretically allows spoofing, no confirmed scams or user losses have been reported.

Signal A: No scam or fraud reports

Signal B: Lack of DMARC policy may increase spoofing risk

Category Scores

Red Flags & Warnings

  • Posteo does not implement a strict DMARC policy, which can theoretically allow email spoofing though no incidents have been reported.

🔎 Detailed Checks & Analysis

Domain Traffic and Popularity

Score: 90/100
Passed

"Traffic data from SimilarTech and SimilarWeb shows sustained user engagement typical for a trusted email provider."

Reason: High monthly visits (~5.3 million) primarily from Germany and surrounding countries indicate legitimate and active use.

SSL and DNS Security

Score: 85/100
Passed

"No signs of domain expiry or SSL invalidation detected; security measures are in place and current."

Reason: Valid SSL certificate from GeoTrust and properly configured DNS with multiple nameservers ensure technical soundness.

Blacklist and Safe Browsing Status

Score: 90/100
Passed

"No matched threats or blacklisting suggest good standing in security databases."

Reason: Domain is neither flagged on crypto scam lists nor identified by Google Safe Browsing as risky.

Legal and Trademark Validation

Score: 85/100
Passed

"No legal disputes or inactive trademark status found; ownership by recognized individual based in Germany."

Reason: Registered trademark in the US with live status supports legitimate brand and business identity.

Customer and Public Reputation

Score: 95/100
Passed

"Some technical criticisms exist but no credible scam or fraud reports."

Reason: Independent reviews highlight strong privacy, security, and ethical business practices with no fraud allegations.

Your Next Steps

  • 1

    Use Posteo.de with confidence for privacy-focused email needs.

  • 2

    Verify the URL to avoid phishing attempts exploiting the lack of DMARC protection.

  • 3

    Report any suspicious emails purporting to be from Posteo to their official support.

  • 4

    Review privacy policies to understand account management and payment terms.

Evidence & Citations

🕵🏻 Keep investigating

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