Open
Cached
·
just now
95/100
SECURITY SCORE
Certificate Information
Subject
CN=postia.de
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
December 18, 2025
Valid Until
March 18, 2026
64 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
EF:D8:9E:65:E9:EB:DE:D5:DA:CA:9A:E1:0A:00:32:81:84:38:23:D7:18:7A:87:9B:E5:08:18:C1:83:51:1E:D7
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Good
max-age=63072000; includeSubDomains
Content-Security-Policy
Good
default-src; base-uri; manifest-src; +10 more
default-src 'none';base-uri 'none';manifest-src 'self';script-src 'nonce-Ag/ruYFqsENcIlhxuqn5e/l1UWrF1Q2szdqspVIx0sw=';script-src-elem 'strict-dynamic' 'nonce-Ag/ruYFqsENcIlhxuqn5e/l1UWrF1Q2szdqspVIx0sw=';style-src 'self' 'unsafe-inline';img-src 'self' data: blob: https://*.tile.openstreetmap.org https://www.postia.de;font-src 'self' data:;connect-src 'self';media-src 'self';frame-src 'self' nc: https://www.postia.de;frame-ancestors 'self' https://www.postia.de;form-action 'self' https://www.postia.de
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer
Permissions-Policy
Missing
Not configured
Recommendations
- • Consider adding 'preload' to HSTS for maximum security
- • Strengthen CSP by removing 'unsafe-eval'
- • Consider adding Permissions-Policy to control browser features
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Authorized
(Matches CAA policy)
Authorized CAs
Incident Reporting
mailto:[email protected]
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'issuewild' records to control wildcard certificate issuance