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Security report for mailchi.mp

Mailchimp · Technology · United States

Low risk. 3 critical or high findings in Security headers, GDPR outside view and 1 other check.

Security score

82/100

Risk levelLow

0–100, higher is better. How it is calculated

Mailchimp is a well-established enterprise SaaS company specializing in marketing automation and email marketing platforms. Owned by Intuit Inc., it holds a leading market position with a comprehensive suite of services including AI-driven marketing tools, website building, and audience management. The website reflects a mature digital presence with excellent content quality, clear navigation, and strong branding consistency. Technically, Mailchimp employs a modern technology stack with robust analytics and performance optimization, hosted on a reputable CDN and infrastructure provider. Security posture is strong with HTTPS enforcement, domain locking, and multiple security tools integrated, although DNSSEC is not enabled. Privacy compliance is well addressed with clear policies and consent mechanisms. Overall, the website and domain registration data indicate a trustworthy and professional business with minimal risk.

Scanned

This is an earlier scan of mailchi.mp. View the latest report

NIS2 and GDPR posture

GDPR outside view
85/ 100 · Low
Checks completed
7of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

3 findings rated critical or high. Fix these first.

  1. Security headers

    Security headers are instructions your web server sends to every visitor’s browser. Missing ones leave visitors more exposed to attacks such as clickjacking and injected scripts.

    • High

      Missing Content-Security-Policy header

      Controls resources the browser is allowed to load

      What to do: Implement a Content-Security-Policy appropriate for your application

      • ASVS V3.4.3
      • OWASP Secure Headers: OWASP Secure Headers Project recommends Content-Security-Policy: default-src 'self'; form-action 'self'; base-uri 'self'; object-src 'none';…
  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

  3. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • High

      Weak Protocols Supported

      Server supports weak protocols: TLSv1.1

      What to do: Disable TLS 1.0, TLS 1.1, and all SSL versions

      • CWE-327
      • OWASP A04:2025
      • ASVS V12.1.1

Need hands-on remediation? Email guard@offseq.com

Keep watching mailchi.mp

This scan found 14 issues across 6 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

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  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
82
Security headers
45
Email security
87
DNS health
90
Network security
100
GDPR outside view
85
Average
82

Not counted

  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Breach exposure

Leaked credentials and lookalike domains from OffSeq Breach. The counts are free; the detailed lists are paid add-ons.

Dark web exposure

Add-on

Leaked records that mention mailchi.mp, from OffSeq Breach.

Total records
216
Employees
0
Customers
159
Third parties
57
Weak passwords
25%

4 subdomains affected

See the 10 newest leaked credentials

A one-off add-on to this report that lists the most recent identifier and password pairs OffSeq Breach holds for mailchi.mp.

Select it in the checkout above.

Breach keeps ingesting new leaks, so these numbers can grow between scans.

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

Mailchimp operates in the technology and e-commerce sectors, targeting businesses and marketers globally. Its SaaS business model includes tiered subscriptions and free trials, supported by a broad ecosystem of integrations with major platforms like Shopify, WooCommerce, and Salesforce. The company benefits from its parent Intuit's backing, enhancing credibility and market reach. Mailchimp's competitive advantages include AI-powered marketing automation, extensive integrations, and a user-friendly platform. The company maintains a strong partnership ecosystem and invests in marketing and analytics tools to optimize user engagement and growth.

Security posture

Mailchimp demonstrates a high level of security maturity with enforced HTTPS, domain status protections, and use of bot mitigation tools like reCAPTCHA. The presence of monitoring and error reporting tools such as Bugsnag and FullStory indicates proactive security and performance management. However, the absence of DNSSEC and explicit public security policies or incident response contacts suggests areas for improvement. No vulnerabilities or exposed sensitive data were detected in the analysis. Privacy compliance is robust, supporting GDPR requirements with cookie consent and privacy policies.

Recommendations

  1. Enable DNSSEC to enhance DNS security and prevent spoofing.
  2. Publish a dedicated security policy and incident response contact information.
  3. Implement and publish a security.txt file to facilitate vulnerability disclosures.
  4. Regularly review and audit third-party scripts to mitigate supply chain risks.
  5. Enhance transparency around data protection officer contact details to improve GDPR compliance.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
Mailchimp
Description
Mailchimp provides a marketing, automation, and email marketing platform that uses real-time behavior data and AI to help businesses convert more customers. It offers easy-to-use tools with a free trial option.
Key services
Email marketing, Marketing automation, Website builder, Social media marketing, Audience management, Analytics and reporting, AI marketing tools, Content creation tools, Lead generation platform
Content quality
excellent
Branding
consistent

Technology

Stack
JavaScript, Google Tag Manager, Google Analytics, Optimizely, FullStory, Bugsnag, AppFabric, OneTrust Cookie Consent, Google reCAPTCHA, Qualtrics, BrightEdge
Frameworks
AppFabric, Optimizely
Platforms
Google Analytics, FullStory, OneTrust
Performance
fast
Mobile
excellent
Accessibility
good
SEO
excellent

Security

Observed score
85/100
Good practices seen
  • HTTPS enforced
  • Use of reCAPTCHA for bot protection
  • Cookie consent management
  • Use of security monitoring tools (Bugsnag)
  • Use of security headers (domain status flags)

Analytics and tracking

Services
Google Analytics, FullStory, Segment, Optimizely, Bugsnag
Tracking level
extensive
Privacy practices
good

Advertising

Tracking pixels
FullStory, Segment, Optimizely, Bugsnag
Marketing tools
Qualtrics, OneTrust Cookie Consent, BrightEdge
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is rich, professional, and well-structured.
  3. Strong use of modern web technologies and analytics.
  4. Clear business model and market positioning.
  5. Good privacy and cookie compliance with consent mechanisms.
  6. No suspicious or malicious content detected.
  7. Domain WHOIS data supports legitimacy and trust.
Technical notes

Notes

The website is built on a modern, performant infrastructure leveraging JavaScript frameworks, Google Tag Manager, and multiple analytics and marketing tools. Hosting is via Akamai CDN, ensuring fast global delivery. The site is mobile-optimized and accessible, with comprehensive SEO metadata and structured data. Use of advanced tools like AppFabric and Optimizely indicates a mature digital marketing and performance optimization strategy. No technical debt or deprecated technologies were detected. The site employs multiple layers of tracking and analytics, balanced with user consent mechanisms.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 84/100 +2Low19 findingsView report
  2. 82/100Low19 findingsView report
  3. 82/100Low20 findingsView report
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