DNS Gurus

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for cpanel.cuponerapp.com, cuponerapp.com, cuponerapp.com.mx, webmail.cuponerapp.com, www.cuponerapp.com, www.cuponerapp.com.mx, not for mail.cuponerapp.com

Cached · just now
88/100 SECURITY SCORE

Certificate Information

Subject
CN=webmail.cuponerapp.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
December 04, 2025
Valid Until
March 04, 2026 69 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
CB:49:1E:B7:A0:D8:BE:87:D8:B7:91:7A:5D:7B:BA:FC:50:65:44:DF:88:B2:2D:51:86:8D:0B:B7:E1:47:C5:8C
Alternative Names
6 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
Present
max-age=31536000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
sameorigin
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer
Permissions-Policy
Present
accelerometer=(self), ambient-light-sensor=(self), autoplay=(self), battery=(self), camera=(self), cross-origin-isolated=(self), display-capture=(self), document-domain=*, encrypted-media=(self), execution-while-not-rendered=*, execution-while-out-of-viewport=*, fullscreen=(self), geolocation=(self), gyroscope=(self), magnetometer=(self), microphone=(self), midi=(self), navigation-override=(self), payment=(self), picture-in-picture=*, publickey-credentials-get=(self), screen-wake-lock=(self), sync-xhr=*, usb=(self), web-share=(self), xr-spatial-tracking=(self)
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks

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