Open
Cached
·
just now
20
Headers
HTTP Security Headers
Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Basic
default-src; media-src; connect-src; +8 more
default-src 'self'; media-src 'self' blob:; connect-src 'self' blob: https://proton.me https://*.proton.me; script-src 'self' 'wasm-unsafe-eval' blob: 'sha256-eAhF1Kdccp0BTXM6nMW7SYBdV0c3fZwzcC177TQ692g='; style-src 'self' 'unsafe-inline'; img-src http: https: data: blob: cid:; frame-src 'self' blob: https://mail-api.proton.me https://account.proton.me https://verify.proton.me https://calendar.proton.me https://drive.proton.me https://proton.me; object-src 'self' blob:; child-src 'self' data: blob:; report-uri https://reports.proton.me/reports/csp; frame-ancestors https://calendar.proton.me https://drive.proton.me;
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Consider adding Permissions-Policy to control browser features
Performance Headers
4 headers
Accept-Ranges
Performance
bytes
Connection
Performance
close
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Encoding
Caching Headers
4 headers
Cache-Control
Caching
max-age=0, no-cache, no-store, must-revalidate
Expires
Caching
Wed, 11 Jan 1984 05:00:00 GMT
Last-Modified
Caching
Fri, 16 Jan 2026 11:44:20 GMT
Pragma
Caching
no-cache
Content Headers
1 headers
Content-Type
Content
text/html; charset=UTF-8
Server Headers
0 headers
No server headers found
CORS Headers
0 headers
No CORS headers found
Cookies Headers
1 headers
Set-Cookie
Cookies
Tag=default; Path=/; SameSite=None; Secure; Max-Age=7776000
Other Headers
4 headers
Date
Other
Fri, 16 Jan 2026 21:23:18 GMT
Onion-Location
Other
https://mail.protonmailrmez3lotccipshtkleegetolb73fuirgj7r4o4vfu7ozyd.onion
Public-Key-Pins-Report-Only
Other
pin-sha256="CT56BhOTmj5ZIPgb/xD5mH8rY3BLo/MlhP7oPyJUEDo="; pin-sha256="35Dx28/uzN3LeltkCBQ8RHK0tlNSa2kCpCRGNp34Gxc="; report-uri="https://reports.proton.me/reports/tls"
X-Permitted-Cross-Domain-Policies
Other
none
Recommendations
Enable compression (gzip/brotli) to improve performance