Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BTLS Certificate Expiry & Recommendations190 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable DNSSEC on your domain for DNS spoofing protection
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+DNS Records4 A records, 55 ms lookupPASS
| A | 3.164.163.88, 3.164.163.85, 3.164.163.49, 3.164.163.24 |
| AAAA | — |
| CNAME | — |
| NS | ns-495.awsdns-61.com, ns-1320.awsdns-37.org, ns-1736.awsdns-25.co.uk, ns-984.awsdns-59.net |
| MX | 0 aspmx.l.google.com 5 alt1.aspmx.l.google.com 5 alt2.aspmx.l.google.com 10 aspmx2.googlemail.com 10 aspmx3.googlemail.com |
| TXT | SPF v=spf1 redirect=mxtoolbox.com.hosted.spf-report.com google-site-verification=a72lcHiaH48r427O4d4O6SrvOBQkmH4IGZ98mH9YWwU yahoo-verification-key=VtY1K1/IZ0c2E6oFnpXiTymAITi3lqo8IlXNDII0LdE= 6ffyqp6bfm0xx4bcgd1ybz0jtknhgpdy lml8nrmxdc063ms0skf3bnvm2zvslffz mailru-verification: 18440d267f8068a2 |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
A+Redirect ChainNo redirects — direct accessPASS
https://mxtoolbox.com
152 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://mxtoolbox.com | 200 | 152 ms | HTTP/1.1 | Microsoft-IIS/10.0 |
A+Crawlabilityrobots.txt present, sitemap with 39 URLsPASS
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
# General rules for all crawlers
User-agent: *
# Block access to API endpoints
Disallow: /api/v*
# Block access to premium or user-specific content
Disallow: /pro/
# Block access to email template resources
Disallow: /public/emailtemplates/
# Block direct access to the email header analysis tool
Disallow: /public/tools/emailheaders.aspx
# Block access to unsubscribe page to avoid unnecessary indexing
Disallow: /public/unsubscribe.aspx
# Block access to checkout pages to avoid indexing dynamic purchase flows
Disallow: /public/checkout/
# Block AhrefsBot from crawling problem diagnostic tools
User-agent: AhrefsBot
Disallow: /problem/
# Block dotbot (used by Dotcom-Monitor) from domain-specific health tools
User-agent: dotbot
Disallow: /domain/
Disallow: /emailhealth/
# Block Meta AI training bots from crawling any content
User-agent: meta-externalagent
Disallow: /SuperTool.aspx
A+URL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Consistent
A+Domain Intelligencemxtoolbox.com — via Network Solutions, LLC, 21 years, 10 months old, hosted on AWSPASS
78 days
September 28, 2026
190 days
Issued by Amazon
21 years, 10 months
Registered September 28, 2004
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
3.164.163.49
Network Solutions, LLC
Expiry timeline
Recommended actions
- Renew the domain or enable auto-renewal to prevent accidental expiry
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.
Learn more ▾ ▴
DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.
Source: ICANN / RFC 4033
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.
Learn more ▾ ▴
Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.
Source: ICANN / domain-security best practice