Security Report Summary
R
Redirect: Click here to follow the redirect to https://accounts.google.com/ServiceLogin?service=mail&passive=1209600&osid=1&continue=https://mail.google.com/mail/u/0/&followup=https://mail.google.com/mail/u/0/&emr=1.
Site: https://mail.google.com/mail/u/0/
IP Address: 172.253.116.83
Report Time: 09 Nov 2026 22:21:52 UTC
Headers:
  • Strict-Transport-Security
  • Permissions-Policy
  • X-Frame-Options
  • X-Content-Type-Options
  • Content-Security-Policy
  • Referrer-Policy
Warning: Grade capped at A, please see warnings below.
Advanced:
Perform a deeper security analysis of your website and APIs:
Missing Headers
Content-Security-PolicyContent Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources of approved content, you can prevent the browser from loading malicious assets.
Referrer-PolicyReferrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites.
Warnings
Response is not HTMLThe content-type of the response does not indicate HTML. Not all headers, and therefore the score, may be appropriate.
Permissions-PolicyWe didn't detect a viable policy.
Raw Headers
HTTP/2302
content-typeapplication/binary
varySec-Fetch-Dest, Sec-Fetch-Mode, Sec-Fetch-Site
cache-controlno-cache, no-store, max-age=0, must-revalidate
pragmano-cache
expiresMon, 01 Jan 1990 00:00:00 GMT
dateMon, 09 Nov 2026 22:21:52 GMT
locationhttps://accounts.google.com/ServiceLogin?service=mail&passive=1209600&osid=1&continue=https://mail.google.com/mail/u/0/&followup=https://mail.google.com/mail/u/0/&emr=1
strict-transport-securitymax-age=10886400; includeSubDomains
permissions-policych-ua-arch=*, ch-ua-bitness=*, ch-ua-full-version=*, ch-ua-full-version-list=*, ch-ua-model=*, ch-ua-wow64=*, ch-ua-form-factors=*, ch-ua-platform=*, ch-ua-platform-version=*
cross-origin-resource-policysame-site
cross-origin-opener-policysame-origin-allow-popups
serverESF
content-length0
x-xss-protection0
x-frame-optionsSAMEORIGIN
x-content-type-optionsnosniff
alt-svcclear
Upcoming Headers
Cross-Origin-Embedder-PolicyCross-Origin Embedder Policy allows a site to prevent assets being loaded that do not grant permission to load them via CORS or CORP.
Additional Information
strict-transport-securityHTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
permissions-policyPermissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
cross-origin-resource-policyCross-Origin Resource Policy allows a resource owner to specify who can load the resource.
cross-origin-opener-policyCross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser.
serverServer value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2".
x-xss-protectionX-XSS-Protection sets the configuration for the XSS Auditor built into older browsers. The recommended value was "X-XSS-Protection: 1; mode=block" but you should now look at Content Security Policy instead.
x-frame-optionsX-Frame-Options tells the browser whether you want to allow your site to be framed or not. By preventing a browser from framing your site you can defend against attacks like clickjacking.
x-content-type-optionsX-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. The only valid value for this header is "X-Content-Type-Options: nosniff".