Skip to main content

Security report for outlook.com

Microsoft · Technology · United States

Low risk. 4 critical or high findings in Security headers and GDPR outside view.

Security score

78/100

Risk levelLow

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

Microsoft Outlook, a flagship product of Microsoft Corporation, provides integrated email and calendar services accessible via desktop, mobile, and web platforms. It supports multiple email accounts including popular providers like Gmail, Yahoo, and iCloud, enhancing user productivity through a unified interface. The service is positioned as part of the broader Microsoft 365 ecosystem, offering both free and subscription-based plans with advanced features such as AI-powered Copilot for enhanced email management. The website demonstrates a mature digital infrastructure leveraging Adobe Experience Manager and Microsoft Azure hosting, ensuring high performance, mobile optimization, and accessibility. Security is robust with strong SSL configurations, HSTS enforcement, and absence of known vulnerabilities, although DNSSEC is not enabled and some CAA records appear misconfigured. Privacy and cookie policies are comprehensive and GDPR compliant, reflecting Microsoft's commitment to user data protection. Overall, the site reflects a high level of professionalism, trustworthiness, and technical sophistication, supporting Microsoft's market leadership in productivity software.

Scanned

This is an earlier scan of outlook.com. View the latest report

NIS2 and GDPR posture

GDPR outside view
40/ 100 · High
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

4 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 Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • 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

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

Keep watching outlook.com

This scan found 13 issues across 5 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

€25per month

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

Email alerts on material changes and an exportable JSON history of every change.

Billed monthly to your card. Cancel anytime. The full timeline opens with your unlock code.

Full report

€39.90one-time

  • The complete analysis as a PDF you can cite
  • Email delivery with an unlock code
  • Lifetime access to this report

Prices incl. 21% VAT. Secure checkout by Mollie; sold by SEQ SIA, Latvia.

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
100
Security headers
55
Email security
85
DNS health
90
Network security
100
GDPR outside view
40
Average
78

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 outlook.com, from OffSeq Breach.

Total records
34,240,644
Employees
19,426
Customers
196,307
Third parties
34,024,911
Weak passwords
9%

Latest record dated 2026-06-18 · 9,299 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 outlook.com.

Select it in the checkout above.

Masked preview

  • –outlook.com2026-06-18
  • –outlook.com2026-06-18
  • –smtp-mail.outlook.com2026-06-18
  • –outlook.com2026-06-18
  • –outlook.com2026-06-18

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

Open in Breach(opens in a new tab)Monitor on Breach(opens in a new tab)

Technical appendix

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

Business context

Business profile

Microsoft maintains a dominant market position in the technology sector, particularly in productivity and collaboration tools. Outlook serves a broad target audience including individual consumers, businesses, and educational institutions. The business model combines free access with premium subscription tiers, generating revenue through Microsoft 365 plans. The integration of AI features like Copilot indicates a strategic focus on innovation and user experience enhancement. The extensive partner ecosystem, including Azure, Teams, and other Microsoft services, supports a comprehensive offering. The website's content and navigation facilitate user engagement and conversion, with clear calls to action for account creation, app downloads, and plan purchases. The presence of detailed plans and pricing, along with educational resources and news updates, supports customer retention and upselling opportunities.

Security posture

The security posture of the Outlook website is strong, featuring an up-to-date DigiCert SSL certificate valid through March 2026, with a 2048-bit key. The site enforces HTTPS with HSTS including subdomains and preload, mitigating man-in-the-middle attacks. Security headers such as X-Frame-Options and X-Content-Type-Options are present, reducing clickjacking and MIME sniffing risks. No critical SSL/TLS vulnerabilities like Heartbleed, POODLE, FREAK, or Logjam are detected. However, DNSSEC is not enabled, which could expose DNS-related attacks. The CAA records appear misconfigured or undefined, which may impact certificate issuance controls. No explicit security or incident response policies are found on the site, and no dedicated security contact emails are provided, representing an area for improvement. Overall, the site follows best practices but could enhance DNS security and transparency around security policies.

Recommendations

  1. Enable DNSSEC to protect against DNS spoofing and cache poisoning attacks.
  2. Correct and properly configure CAA records to restrict certificate authorities.
  3. Publish a security.txt file to facilitate responsible vulnerability disclosure.
  4. Provide explicit security and incident response policy pages with contact information.
  5. Enhance visibility of security contacts to improve incident reporting and response.
Technical notes

Notes

The website is built on Adobe Experience Manager (AEM) CMS and hosted on Microsoft Azure, leveraging modern web technologies including JavaScript, CSS, and HTML5. It uses Adobe Helix RUM for real user monitoring and Microsoft 1DS for telemetry. The site is optimized for performance with fast load times and mobile responsiveness. Accessibility features and SEO optimizations are well implemented. The tech stack includes integration with Microsoft OneCloud services and LivePerson for chat support. The site demonstrates a mature and scalable infrastructure suitable for a global enterprise. Some technical debt is noted in the form of undefined CAA records and lack of DNSSEC, which should be addressed to maintain security and compliance.
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. 81/100 +1Low22 findingsView report
  2. 80/100Low23 findingsView report
Reviews of this site

Share your experience with outlook.com. Every review is verified by email and published after moderation.

Overall rating
Select a rating
4000 characters remaining

We’ll email you to confirm your review and keep your details private.

Community rating

No published reviews yet. Be the first to review outlook.com.

Feedback on this report

Rate this report, add an optional comment, and tell us if you want a security specialist to follow up.

Overall report quality
Select a rating
2000 characters remaining

We only use your feedback to improve Guard reports. Contact details are never shared.