HTTP Headers Analysis for https://mail.cleanmail.eu

Detected Technologies from Headers

See all in URL Inspect 1

Express

HTTP Security Headers

Status

Strict-Transport-Security

Present

max-age=63072000;

Content-Security-Policy

Basic

connect-src; default-src; script-src; +3 more Analyze

Content-Security-Policy-Report-Only

Missing

Not configured Analyze

X-Frame-Options

Good

SAMEORIGIN

X-Content-Type-Options

Good

nosniff

Referrer-Policy

Good

no-referrer-when-downgrade

Permissions-Policy

Missing

Not configured

Recommendations

• Increase HSTS max-age to at least 1 year and add includeSubDomains
• Improve CSP by adding more specific directives and removing 'unsafe-inline'
• Consider adding Permissions-Policy to control browser features

Performance Headers

Accept-Ranges

Performance

bytes

Connection

Performance

close

Vary

Performance

Accept-Encoding

accept-ranges: bytes
connection: close
vary: Accept-Encoding

Caching Headers

Cache-Control

Caching

public, max-age=0

Etag

Caching

W/"f67-19f89867430"

Last-Modified

Caching

Wed, 22 Jul 2026 11:11:58 GMT

cache-control: public, max-age=0
etag: W/"f67-19f89867430"
last-modified: Wed, 22 Jul 2026 11:11:58 GMT

Content Headers

Content-Length

Content

3943

Content-Type

Content

text/html; charset=UTF-8

content-length: 3943
content-type: text/html; charset=UTF-8

Server Headers

X-Powered-By

Server

Express

x-powered-by: Express

CORS Headers

Access-Control-Allow-Origin

Cors

*

access-control-allow-origin: *

Cookies Headers

No cookies headers found

Other Headers

Date

Other

Sat, 01 Aug 2026 18:15:48 GMT

date: Sat, 01 Aug 2026 18:15:48 GMT

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology