Open
Cached
·
just now
90/100
SECURITY SCORE
Certificate Information
Subject
CN=careers.mimecast.com
Issuer
C=US, O=Google Trust Services, CN=WE1
Valid From
October 23, 2025
Valid Until
January 21, 2026
74 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA256
SHA-256 Fingerprint
5D:99:37:ED:E1:9F:52:4E:E0:64:45:9A:1F:3A:5D:C7:C3:C7:BB:A3:05:2B:E8:EC:10:AF:15:4B:69:F5:F9:1C
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=31536000; includeSubDomains; preload
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
SameOrigin
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Present
geolocation=(self), accelerometer=(), camera=(), gyroscope=(), magnetometer=(), microphone=(), payment=(), usb=(), midi=()
Recommendations
- • 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