Open
Cached
·
just now
95/100
SECURITY SCORE
Certificate Information
Subject
CN=*.smtp2go.net
Issuer
C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Domain Validation Secure Server CA
Valid From
February 14, 2025
Valid Until
March 06, 2026
64 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
15:E2:F9:23:1A:89:40:84:22:14:29:74:C1:A9:83:91:5F:8C:89:23:D0:BF:E1:E1:EA:3F:16:D0:2B:64:10:35
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
Good
max-age=31536000; includeSubDomains
Content-Security-Policy
Strong
default-src; style-src; font-src; +4 more
default-src 'self'; style-src 'self' https://fonts.googleapis.com 'sha256-qu/DA/rYdnX+6KBfIuR3TOhptBOBZW5dbmK89Ckd3gM=' 'sha256-zqiMqGYP1YZ5gW2psQKxjVB3CQGC7gzqZUrTnc1LAxQ='; font-src 'self' https://fonts.gstatic.com; frame-ancestors 'self'; form-action 'self'; script-src 'sha256-qu/DA/rYdnX+6KBfIuR3TOhptBOBZW5dbmK89Ckd3gM='; img-src 'self' https://www.smtp2go.com;
X-Frame-Options
Excellent
deny
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer
Permissions-Policy
Present
accelerometer=(), ambient-light-sensor=(), autoplay=(), battery=(), camera=(), cross-origin-isolated=(), display-capture=(), document-domain=(), encrypted-media=(), execution-while-not-rendered=(), execution-while-out-of-viewport=(), fullscreen=(), geolocation=(), gyroscope=(), keyboard-map=(), magnetometer=(), microphone=(), midi=(), navigation-override=(), payment=(), picture-in-picture=(), publickey-credentials-get=(), screen-wake-lock=(), sync-xhr=(), usb=(), web-share=(), xr-spatial-tracking=()
Recommendations
- • Consider adding 'preload' to HSTS for maximum security
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