Is mailgun.com Safe? Security Analysis for Transactional Email API Service For Developers | Mailgun
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Above Technology avg (72)
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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
Mailgun is a leading transactional email API service provider targeting developers and businesses that require reliable, scalable email delivery solutions. The company offers a comprehensive suite of email services including sending, validation, optimization, and testing, positioning itself strongly in the technology sector with a large enterprise customer base including major tech companies. The website demonstrates a mature technical infrastructure built on WordPress with modern performance and SEO optimizations, ensuring excellent user experience and accessibility. Security posture is robust with HTTPS enforcement, ISO 27001 certification, and a dedicated security portal, although WHOIS data is unavailable which slightly impacts trust but is mitigated by the company's known parent entity, Sinch. Overall, Mailgun presents a professional, trustworthy, and technically sound platform for transactional email services.
Detected Technologies
6 urgent findings need attention
6 high
Keep mailgun.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
2 findings
85/100
GDPR Compliance
1 finding
95/100
NIS2 Compliance
8 findings
17/100
Email Security
4 findings
80/100
🧠AI Business Intelligence
Technology stack, business insights, and market analysis powered by AI.
Business Intelligence
Market & Strategic Analysis
Mailgun operates a SaaS business model focused on email API services, targeting developers and enterprises needing transactional email capabilities. The company leverages partnerships with related email service providers and maintains a strong ecosystem with comprehensive documentation and support. Its market position is reinforced by a large client base and industry certifications. Revenue streams likely include subscription plans and enterprise contracts. The company is part of Sinch, a larger communications platform provider, enhancing its market credibility and reach. Strategic observations include a focus on customization, deliverability, and compliance, catering to evolving business needs in email communications.
Security Posture Analysis
Comprehensive Security Assessment
Mailgun exhibits a mature security posture with enforced HTTPS, presence of security headers, and ISO 27001 certification. The website links to a security portal and provides incident response contact channels, indicating readiness for security incidents. No obvious vulnerabilities or exposed sensitive data were detected. However, the absence of a security.txt file and explicit incident response page are areas for improvement. Compliance with GDPR is indicated through privacy and cookie policies. Overall, the security culture appears strong but could benefit from enhanced transparency and formal vulnerability disclosure mechanisms.
Strategic Recommendations
Priority Actions for Security Improvement
Publish a security.txt file to facilitate vulnerability reporting and improve transparency.
✨Observations
AI-powered comprehensive website and business analysis.
AI-Enhanced Website Analysis
Business Insights
Transactional Email API Service For Developers | Mailgun
Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!
excellent
consistent
Technical Stack
fast
excellent
good
excellent
Security Assessment
- HTTPS enforced
- Lazy loading and script deferring for performance
- Security portal linked
- ISO 27001 certification
Analytics & Tracking
Advertising & Marketing
Website Quality Assessment
Key Observations
Website is fully accessible with no blocking or WAF challenges.
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🛡️Security Headers
HTTP security headers analysis and recommendations.
Security Headers
HTTP security headers analysis
Missing X-XSS-Protection header
MEDIUMLegacy XSS protection (deprecated but still recommended)
Sensitive data may be cached
LOWCache-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
No Data Protection Officer mentioned
LOWLarge organizations may need to designate a DPO under GDPR
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 vulnerability reporting mechanism
MEDIUMClear vulnerability reporting supports coordinated disclosure
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
Complex SPF record
LOWToo many include statements can cause lookup limits
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
DKIM Selectors Found
DMARC Details
🏆SSL/TLS Security
Certificate validity and encryption analysis.
SSL/TLS Security
Certificate validity and encryption analysis
Weak Protocols Supported
HIGHServer supports weak protocols: TLSv1.1
OCSP Stapling Not Enabled
LOWOCSP stapling improves performance and privacy
Certificate Transparency Not Implemented
LOWCertificate is not logged in Certificate Transparency logs
SSL Certificate Expires Within 90 Days
MEDIUMSSL certificate expires in 68 days
Weak SSL Key Length
HIGHSSL certificate uses 256-bit key, which is considered weak
Partial SSL/TLS Assessment
LOWCompleted 3 of 4 security checks due to time constraints
Protocol Support
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
Domain Delete Lock Not Enabled
LOWDomain can be deleted without additional verification
Domain Registration Details
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 mailgun.com compare?
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🔧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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