Website readiness profile · Snapshot 23 October 2026
mail.com
mail.com's public homepage, certificate and DNS checked against 31 practices and compared with 33 Webmail & Message Inboxes sites.
- Readiness index
- 77/100
- Ahead of
- 79%
- Practices observed
- 21/31
- Popularity band
- Top 50K
Webmail & Message Inboxes median 64
of measured Webmail & Message Inboxes sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: mail.com. Thin bar: Webmail & Message Inboxes peer median.
Enable
79/100
Peers 60
Harden
86/100
Peers 67
Accelerate
63/100
Peers 54
Recover
0/100
Peers 19
Priority fixes for mail.com
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for 15 hours, short of the 30-day benchmark.
Why it matters: Returning visitors and later page views reuse cached files instead of downloading them again.
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. Limit: Read from the homepage response only; other pages or regions may send different headers.
Priority 2 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 2 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.
30% of Webmail & Message Inboxes peers do this.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 3 · 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
Priority 4 · Harden
Certificate lifetime of 100 days or less
Observed: The certificate from Sectigo Limited had a 198-day validity period, longer than the 100-day maximum that applies from March 2027.
What to do: Move to automated issuance and renewal now, while you still have time to test it.
38% of Webmail & Message Inboxes peers do this.
What mail.com already does well
Practices fewer than half of Webmail & Message Inboxes peers use.
- security.txt publishedsecurity.txt with a contact found.20% of peers
- CAA records limit who can issue certificatesCAA limits issuance to digicert.com, sectigo.com, telesec.de.33% of peers
- XML sitemap discoverableSitemap found.33% of peers
What we saw
- Homepage checked
- https://www.mail.com/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Sectigo, 198-day validity, expiring 2027-03-19
- DNS operators
- IONOS DNS
- HSTS
- max-age 365 days, includeSubDomains
- DMARC policy
- p=quarantine
- Homepage HTML
- 134 KB, br
- Images on homepage
- 13 (webp 55, svg 1)
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
Not observed 10
Observed 21
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- CAA records limit who can issue certificates
- DNSSEC signed
- security.txt published
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- HTTP/2 negotiated
- HTML compressed
- Modern image formats in use
- Offscreen images lazy-loaded
- robots.txt published
- XML sitemap discoverable
- Canonical URL declared
- Meta description written
- Mobile viewport configured
- Page language declared
- At most one redirect to the homepage
Own mail.com?
Re-run the checks after a change, or verify the site in a free workspace to save reports with history, compare against similar sites and competitors, and track a private action plan. What owners get.
Live status for this site: Status Is Down: mail.com. This profile covers configuration only.