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SECURITY SCORE
Certificate Information
Subject
CN=clean-mailbox.com
Issuer
C=US, O=Google Trust Services, CN=WE1
Valid From
January 09, 2026
Valid Until
April 09, 2026
62 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA256
SHA-256 Fingerprint
36:DE:1C:16:21:4E:1F:08:1C:42:9A:31:8D:10:E7:EA:02:63:DF:CE:3B:46:B7:51:51:D7:FE:BE:DC:75:32:05
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=15552000; includeSubDomains; preload
Content-Security-Policy
Basic
default-src; style-src; style-src-elem; +3 more
default-src 'self' 'unsafe-eval'; style-src 'self' 'unsafe-inline' fonts.googleapis.com; style-src-elem 'self' 'unsafe-inline' fonts.googleapis.com; script-src 'self' 'unsafe-inline' 'unsafe-eval'; script-src-elem 'self' 'unsafe-inline' 'unsafe-eval'; font-src 'self' 'unsafe-inline' 'unsafe-eval' data: fonts.gstatic.com;
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Present
geolocation=(), microphone=(), camera=()
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
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