Cached · just now
99/100 SECURITY SCORE

Certificate Information

Subject
CN=www.mailhardener.com
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
November 25, 2025
Valid Until
February 23, 2026 42 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
AA:2D:7C:F4:AC:65:4B:30:C1:C2:C0:B9:AF:0E:BE:DA:2E:3C:72:AA:15:B4:FE:B1:2C:58:A0:DA:D0:D3:56:A5
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
Excellent
max-age=63072000; includeSubDomains; preload
Content-Security-Policy
Strong
frame-ancestors; default-src; object-src; +4 more
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer
Permissions-Policy
Present
accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), usb=(), midi=(), sync-xhr=()

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
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

2 domains