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 euler.net, www.euler.net, not for mail.euler.net

Cached · just now
8 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Weak
frame-ancestors
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Significantly strengthen CSP directives
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

1 headers
Transfer-Encoding
Performance
chunked

Caching Headers

0 headers
No caching headers found

Content Headers

1 headers
Content-Type
Content
text/html; charset=UTF-8

Server Headers

1 headers
Server
Server
Apache

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
cprreftrack=cprefna37193; expires=Thu, 05-Feb-2026 10:47:06 GMT; Max-Age=86400; path=/

Other Headers

2 headers
Date
Other
Wed, 04 Feb 2026 10:47:05 GMT
Link
Other
<https://mail.euler.net/wp-json/>; rel="https://api.w.org/", <https://mail.euler.net/wp-json/wp/v2/pages/30>; rel="alternate"; title="JSON"; type="application/json", <https://mail.euler.net/>; rel=shortlink

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching