4fizjo.pl

Readiness by lane

Green: 4fizjo.pl. Thin bar: E-Commerce & Marketplaces peer median.

Priority fixes for 4fizjo.pl

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

1. Priority 1 · Harden

   DMARC policy enforces quarantine or reject

   Observed: The DMARC policy for 4fizjo.pl was p=none, which asks receivers to take no action on failing mail.

   Why it matters: An enforcing DMARC policy helps receiving mail systems reject email that falsely claims to come from your domain, a common route for phishing your customers.

   What to do: Publish DMARC with p=none and a reporting address first, fix any legitimate senders that fail SPF or DKIM alignment, then move to quarantine and finally reject.

   39% of E-Commerce & Marketplaces peers do this. Limit: Read from public DNS at the time of the check; records may have changed since.

   Guide: A Practical Website Health Check for Owners

2. Priority 2 · Accelerate

   Offscreen images lazy-loaded

   Observed: The homepage had 69 images and none used loading="lazy".

   What to do: Add loading="lazy" to images below the fold. Do not lazy-load the main hero image, because that delays the largest visible element.

   72% of E-Commerce & Marketplaces peers do this.

   Guide: Lazy Loading Without Broken Pages

3. Priority 3 · Accelerate

   No render-blocking scripts in <head>

   Observed: The homepage <head> loaded 4 external scripts without async or defer.

   What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.

   44% of E-Commerce & Marketplaces peers do this.

   Guide: Control Third-Party Scripts Before They Control Your Page

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.

   48% of E-Commerce & Marketplaces peers do this.

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

What 4fizjo.pl already does well

Practices fewer than half of E-Commerce & Marketplaces peers use.

• security.txt publishedsecurity.txt with a contact found.7.6% of peers
• Referrer-Policy setReferrer-Policy present.20% of peers
• HSTS kept for at least a yearHSTS with a 365-day max-age.32% of peers

What we saw

Homepage checked

https://4fizjo.pl/

Homepage response

HTTP 200

TLS

TLSv1.3, HTTP/2

Certificate

Asseco Data Systems S.A., 195-day validity, expiring 2027-04-09

DNS operators

1 self-run or other nameserver domain

HSTS

max-age 365 days

DMARC policy

p=none

Homepage HTML

227 KB, gzip

Images on homepage

69 (svg 36, gif 22, webp 6, png 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

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E-Commerce & Marketplaces readiness benchmark