Is 1und1.com Safe? Security Analysis for 1&1 Telecommunication SE
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SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
AI Summary
1&1 Telecommunication SE is a major German telecommunications provider offering a wide range of services including internet (DSL and fiber), mobile phone services, TV, and device sales. As a subsidiary of United Internet AG, it holds a strong market position with comprehensive offerings for both private and business customers. The company integrates advanced digital technologies and maintains a modern, responsive website with extensive content and user-friendly navigation. However, the current SSL configuration is invalid, which poses a security risk. The company employs multiple analytics and marketing tools, ensuring data-driven business operations while maintaining GDPR compliance through detailed privacy and cookie policies. Overall, 1&1 demonstrates a high level of digital maturity and customer trust but should address its SSL and security header deficiencies promptly.
Detected Technologies
7 urgent findings need attention
7 high
Keep 1und1.com under constant watch
Guard tracks your live infrastructure daily: certificate expiry, DNS & mail authentication drift, uptime changes, subdomain inventory, and unexpected tracker or content shifts. A full timeline captures every diff so you can prove remediation and spot regressions instantly.
Security drift alerts
Risk score drops, new high-severity issues, and header hardening gaps
Compliance watch
GDPR / NIS2 posture changes with governance evidence snapshots
Infrastructure surface
Unexpected open services, SSL expiry, DNS & email authentication changes
Content & tracker intelligence
Marketing tech shifts, analytics drift, and AI recommendation updates
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Security Headers
4 findings
65/100
GDPR Compliance
5 findings
43/100
NIS2 Compliance
7 findings
25/100
Email Security
5 findings
70/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
1&1 operates in the telecommunications sector with a broad portfolio including DSL, fiber optic internet, mobile plans, TV services, and device sales such as smartphones and laptops. Its business model focuses on bundled offerings and value-added services like the 1&1 Service Card. The company targets both private consumers and business clients, leveraging its parent company United Internet AG's resources and sister company IONOS for domain and hosting services. 1&1's market position is reinforced by numerous industry awards and a strong brand presence. The website's content and navigation reflect a well-structured approach to customer engagement and product promotion, supported by extensive use of analytics and marketing technologies.
Extracted Contact Information
Marketing Intelligence Data
Physical Addresses (1)
Security Posture Analysis
Comprehensive Security Assessment
The security posture of 1&1's website shows a mix of strengths and weaknesses. While SPF and DMARC records are properly configured and there is no indication of subdomain takeover vulnerabilities, the SSL/TLS configuration is currently invalid with no active protocols enabled, no HSTS, no OCSP stapling, and no session resumption. These gaps significantly reduce the security level of the site and expose users to potential risks. The company maintains comprehensive privacy and cookie policies with user consent mechanisms, indicating good compliance with GDPR. However, the absence of a public security policy or incident response information limits transparency. Overall, the security maturity is moderate but requires urgent improvements in SSL configuration and security headers.
Strategic Recommendations
Priority Actions for Security Improvement
Immediately fix the SSL certificate to ensure it is valid and properly configured.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Weak Strict-Transport-Security configuration
LOWCurrent value: "max-age=15552001; includeSubDomains"
Missing X-Frame-Options header
HIGHPrevents clickjacking attacks
Weak X-XSS-Protection configuration
LOWCurrent value: "0"
Missing Permissions-Policy header
MEDIUMControls browser features and APIs
👤GDPR Compliance
Privacy and data protection assessment under GDPR regulations.
GDPR Compliance
Privacy and data protection assessment
No Cookie Policy found
HIGHGDPR requires clear information about cookie usage
No Cookie Consent Banner found
HIGHGDPR requires explicit consent for non-essential cookies
Insufficient contact information
MEDIUMGDPR requires organizations to provide clear contact details
No Data Protection Officer mentioned
LOWLarge organizations may need to designate a DPO under GDPR
Privacy policy may not be GDPR compliant
MEDIUMPrivacy policy lacks explicit GDPR compliance elements
GDPR Compliance Analysis
🛡️NIS2 Compliance
Network & Information Security Directive compliance assessment.
NIS2 Compliance
Network & Information Security Directive
No information security framework found
HIGHNIS2 requires documented cybersecurity and information security measures
No vulnerability disclosure policy
MEDIUMNIS2 encourages coordinated vulnerability disclosure
No security policy documentation found
HIGHNIS2 requires documented cybersecurity governance and risk management
No incident response procedures found
HIGHNIS2 requires documented incident response and business continuity plans
No business continuity planning found
MEDIUMNIS2 emphasizes operational resilience and business continuity
No security contact information
HIGHNIS2 requires clear incident reporting channels
No NIS2 reference found
LOWConsider explicitly mentioning NIS2 compliance efforts
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📧Email Security
SPF, DKIM, and DMARC validation and email security assessment.
Email Security
SPF, DKIM, and DMARC validation
No DKIM record found
MEDIUMDKIM adds cryptographic signatures to emails
Strict DMARC Alignment
LOWStrict alignment may cause legitimate emails to fail
No BIMI Record
LOWBIMI displays brand logos in email clients
No MTA-STS Policy
MEDIUMMTA-STS enforces TLS for email delivery
No TLS-RPT Record
LOWTLS-RPT provides reporting for email TLS issues
SPF Details
DMARC Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Mixed Content Detected
MEDIUM3 resources loaded over insecure HTTP
OCSP Status
📊DNS Health
DNS configuration and security assessment.
DNS Health
DNS configuration and security assessment
DNSSEC Not Enabled
MEDIUMDNSSEC is not configured for this domain
CAA Records Not Configured
LOWCertificate Authority Authorization (CAA) records not found
DNS Records
DNSSEC Status
DNS Performance
SPF Analysis
⚡Network Security
Port scanning and network exposure analysis.
Network Security
Port scanning and network exposure analysis
Good Network Security Posture
LOWNo unnecessary services detected on common risky ports
How does 1und1.com compare?
See how 1und1.com stacks up against similar websites in the same industry.
🔧Technical Analysis
Detailed technical findings and analysis from AI assessment.
Technical Analysis
Comprehensive security assessment findings
Additional Findings
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Marketing Intelligence
Contact emails, phone numbers & warm leads
Plan Comparison
| Feature | PDF Report | Marketing+ |
|---|---|---|
| Full security analysis | ||
| Professional PDF export | ||
| Email delivery | ||
| Lifetime access + unlock code | ||
| Contact emails & phones | — | |
| Marketing outreach data | — |
Already purchased?
Order summary
Digital reports are delivered immediately after payment. By continuing you acknowledge the withdrawal waiver described in our Returns & Refunds policy.
Secure payments processed via EveryPay. Prices in EUR; Incl. 21% VAT.
SEQ SIA
Lastadijas 12 k-3, Riga, Latvia, LV-1050
Reg. No. 40203410806 • VAT LV40203410806
Support: guard@offseq.com • +371 2256 5353
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