DNS Gurus
Cached · just now
96/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 6
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Certificate Information

Subject
CN=api.mailprotector.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
March 31, 2026
Valid Until
June 29, 2026 48 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
A5:04:68:54:DF:FE:BB:7F:A9:C8:D1:29:6E:B3:46:81:03:37:2A:CE:D2:0E:5F:08:F7:26:B6:DC:26:DA:76:3C
Alternative Names
1 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Google Fonts logo
Basic
font-src; frame-ancestors; object-src; +5 more Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
  • • 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
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
letsencrypt.org
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
  • • Consider adding 'issuewild' records to control wildcard certificate issuance

Subject Alternative Names

1 domain
api.mailprotector.com