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nn.nl

Checked 2026-10-21 21:23 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

25 passed 2 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration iDelegation !Nameservers ✓SOA iDNSSEC !Records

Problems

  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: eur5.akam.net: "48878.31"; eur6.akam.net: "41824.11"; ns1-2.akam.net: "41824.6"; ns1-2.akam.net: "41824.8"; ns1-89.akam.net: "41824.11"; ns1-89.akam.net: "41824.10"; usc3.akam.net: "48878.26"; use3.akam.net: "41824.8"; usw1.akam.net: "41824.9"; usw2.akam.net: "48878.27". Hide or replace the version string.
    #17
  • !
    Very low TTLs
    Records · These records have a TTL below 5m, causing extra queries and slower lookups: A (20s), AAAA (20s). Low TTLs are useful just before a planned change. The NS TTL at the parent is 1h and in the zone 5m; resolvers may use either.
    #32

Recent checks

!

Full report

Domain & DNS report for nn.nl ›

Mail

warn

29 passed 5 warn 0 failed

Areas

✓SPF ✓DMARC ✓DKIM !DNSSEC !MX !TLS ✓BIMI

Problems

  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: nn-nl.w-v1.mx.microsoft
    #11
  • !
    Single MX host, no backup
    MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • !
    Signatures expire in 58h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-24T07:00:28Z (in 58h0m0s). Check that re-signing works.
    #21
  • !
    Not configured
    TLS · MTA-STS is not configured, so other mail servers fall back to unencrypted delivery when TLS fails or is stripped by an attacker. Publish a _mta-sts TXT record and a policy at https://mta-sts.<domain>/.well-known/mta-sts.txt.
    #32
  • !
    Not configured
    TLS · MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".
    #35

Recent checks

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Full report

Mail report for nn.nl ›