Open
Cached
·
just now
90/100
SECURITY SCORE
Certificate Information
Subject
CN=antispam01.cemaselettra.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
October 09, 2025
Valid Until
January 07, 2026
45 days
Public Key
RSA
4096 bit
Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
D3:50:BD:4A:D2:8E:58:52:9D:9F:39:46:52:D2:70:BF:A5:D3:7E:EE:F5:69:DA:98:BB:C0:D9:91:8A:95:F2:BD
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
Present
max-age=63072000; includeSubdomains;
Content-Security-Policy
Basic
base-uri; object-src; script-src; +2 more
base-uri 'self'; object-src 'none'; script-src 'self' 'nonce-b20b7bd9cb1c7c80669f2d4686d2f818' ; frame-ancestors 'none'; upgrade-insecure-requests;
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
same-origin
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Consider adding Permissions-Policy to control browser features
CAA Records (Certificate Authority Authorization)
CAA Records
Not Configured
(Any CA can issue certificates)
CAA Issues
- • No CAA records configured - any CA can issue certificates
Recommendations
- • Implement CAA records to restrict which CAs can issue certificates for your domain
- • This adds an extra layer of security against unauthorized certificate issuance
- • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
- • Consider adding 'iodef' record to receive security incident reports