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SECURITY SCORE
Certificate Information
Subject
CN=*.atmailcloud.com
Issuer
C=US, O=DigiCert Inc, OU=www.digicert.com, CN=RapidSSL TLS RSA CA G1
Valid From
May 19, 2025
Valid Until
June 19, 2026
147 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
F8:FE:9C:3A:31:CD:91:DC:3B:6B:9F:FB:61:8D:27:6A:22:A2:24:F7:16:F2:BB:25:49:20:47:9C:80:2F:71:38
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
Forward Secrecy
Limited
(Check cipher configuration)
Warnings
- • TLS 1.3 is not supported (recommended)
HTTP Security Headers
Status
Strict-Transport-Security
Good
max-age=63072000; includeSubDomains
Content-Security-Policy
Basic
default-src; connect-src; frame-src; +3 more
default-src 'self' jmap-api.pc3.atmailcloud.com; connect-src 'self' jmap-api.pc3.atmailcloud.com admin.pc3.atmailcloud.com graph.microsoft.com www.dropbox.com apis.google.com www.google-analytics.com js.live.net api.onedrive.com webmail2.ftc-i.net legacy-www.mail.fm; frame-src *; script-src 'self' ssl.google-analytics.com www.google-analytics.com graph.microsoft.com www.dropbox.com apis.google.com js.live.net 'unsafe-inline' 'unsafe-eval'; img-src * data: blob: 'unsafe-inline'; style-src * 'unsafe-inline';
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin
Permissions-Policy
Missing
Not configured
Recommendations
- • Consider adding 'preload' to HSTS for maximum security
- • 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