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 mail.yandex.ru, mail.yandex.by, mail.yandex.com, mail.yandex.com.tr, mail.yandex.kz, mail.yandex.fr, mail.yandex.az, mail.yandex.com.am, mail.yandex.com.ge, not for mail.sendpulse.com

Cached · just now
92/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 3
GlobalSign logo GlobalSign Yandex logo Yandex Yandex Tools logo Yandex Tools

Certificate Information

Subject
C=RU, ST=Moscow, L=Moscow, O=YANDEX LLC, CN=mail.yandex.ru
Issuer
C=BE, O=GlobalSign nv-sa, CN=GlobalSign RSA OV SSL CA 2018
Valid From
April 03, 2026
Valid Until
October 01, 2026 150 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
5A:F3:0B:4A:29:77:7D:53:A8:35:42:96:40:84:79:FC:C5:BE:1C:D3:63:FD:4F:5D:F7:E4:3D:71:1A:75:8E:25
Alternative Names
40 domains

Security Configuration

TLS Protocols
TLS 1.0 TLS 1.1 TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)
Warnings
  • • TLS 1.1 is deprecated and should be disabled
  • • TLS 1.0 is deprecated and should be disabled

HTTP Security Headers

Status
Strict-Transport-Security
Excellent
max-age=315360000; includeSubDomains; preload
Content-Security-Policy
Yandex Tools logo
Basic
default-src; style-src; script-src; +13 more Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
origin
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
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