libero.it

Readiness by lane

Green: libero.it. Thin bar: Webmail & Message Inboxes peer median.

Priority fixes for libero.it

Ordered by impact and by how common each practice is among peers.

1. Priority 1 · Harden

   HSTS kept for at least a year

   Observed: The homepage response did not include a Strict-Transport-Security header.

   Why it matters: HSTS tells browsers to use HTTPS for your host on every later visit, which removes the window where a first HTTP request can be intercepted.

   What to do: Send Strict-Transport-Security on HTTPS responses. Start with a short max-age (for example 300 seconds), confirm every subdomain works over HTTPS, then raise it in steps to 31536000. Add includeSubDomains only when all subdomains are HTTPS. HSTS preload is optional and hard to undo; hstspreload.org itself does not recommend it by default.

   On Amazon CloudFront: Attach a response headers policy with Strict-Transport-Security to each distribution.

   61% of Webmail & Message Inboxes peers do this. Limit: Read from the homepage response only; other pages or regions may send different headers.

   Guide: HTTPS and TLS Guide for Website Owners

2. Priority 2 · Accelerate

   Modern image formats in use

   Observed: The homepage had 211 images and none used WebP or AVIF.

   What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.

   41% of Webmail & Message Inboxes peers do this.

   Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

3. Priority 3 · Accelerate

   Static files cached for 30 days or more

   Observed: A same-site stylesheet or script was cacheable for 60 seconds, short of the 30-day benchmark.

   What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.

   28% of Webmail & Message Inboxes peers do this.

   Guide: Browser Caching Guide for Website Owners

4. Priority 4 · Harden

   Content Security Policy present

   Observed: The homepage response did not include a Content-Security-Policy header.

   What to do: Start with Content-Security-Policy-Report-Only to see what would break, tighten the policy over a few weeks, then enforce it.

   42% of Webmail & Message Inboxes peers do this.

   Guide: Payment Security and PCI DSS: What Website Owners Need to Know

What libero.it already does well

Practices fewer than half of Webmail & Message Inboxes peers use.

• Nameservers spread across providersNameservers spread across more than one operator.19% of peers
• Structured data presentJSON-LD structured data found.24% of peers
• No render-blocking scripts in <head>Head scripts load without blocking.30% of peers

What we saw

Homepage checked

https://www.libero.it/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Sectigo, 198-day validity, expiring 2027-01-08

CDN or edge

Amazon CloudFront

DNS operators

2 self-run or other nameserver domains

DMARC policy

p=quarantine

Homepage HTML

703 KB, gzip

Images on homepage

211 (jpg 758, png 60, svg 4)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

All 31 checks

Select a gap for the method and fix. How each check works

Compare with other Webmail & Message Inboxes sites

• att.net68
• laposte.net68
• posteo.de66
• privateemail.com70
• yopmail.com66

Webmail & Message Inboxes readiness benchmark