Open
Cached
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just now
16
Headers
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
Performance Headers
2 headers
Connection
Performance
close
Transfer-Encoding
Performance
chunked
Caching Headers
1 headers
Cache-Control
Caching
no-cache
Content Headers
1 headers
Content-Type
Content
text/html; charset=utf-8
Server Headers
0 headers
No server headers found
CORS Headers
4 headers
Access-Control-Allow-Methods
Cors
*
Access-Control-Allow-Origin
Cors
http://return.smtp2go.net, https://return.smtp2go.net
Access-Control-Expose-Headers
Cors
*
Access-Control-Max-Age
Cors
600
Cookies Headers
0 headers
No cookies headers found
Other Headers
2 headers
Date
Other
Thu, 01 Jan 2026 15:49:46 GMT
X-Permitted-Cross-Domain-Policies
Other
none
Recommendations
Enable compression (gzip/brotli) to improve performance