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nikon.com

Checked 2026-10-22 10:03 UTC · first added 2026-10-21
✗Problems found Score 66 of 100

Domain & DNS

fail

21 passed 2 warn 1 failed

Areas

iRegistration iDelegation ✗Nameservers !SOA !DNSSEC iRecords

Problems

  • ✗
    No DNS over TCP
    Nameservers · DNS over TCP is required (RFC 7766); without it, large answers such as DNSSEC responses fail. Not answering over TCP: dns-a.iij.ad.jp (2001:240:bb81::29:110): read tcp [2a01:4f8:1c1c:eebf::1]:53170->[2001:240:bb81::29:110]:53: read: connection reset by peer.
    #19
  • !
    Unusual SOA timers
    SOA · refresh 10m is outside 20m–1d; retry 30m should be shorter than refresh 10m. Current values: refresh 10m, retry 30m, expire 14d, negative TTL 1h.
    #23
  • !
    Not signed
    DNSSEC · The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Recent checks

✗

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Mail

warn

23 passed 6 warn 0 failed

Areas

!SPF !DMARC !DKIM !DNSSEC !MX !TLS iBIMI

Problems

  • !
    Ends with ?all (neutral)
    SPF · SPF record uses ?all (neutral), which gives no protection against unauthorized senders. Use -all or ~all instead.
    #3
  • !
    Policy: quarantine
    DMARC · DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.
    #4
  • !
    Not enabled
    DNSSEC · DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: mxa-00620203.gslb.pphosted.com, mxb-00620203.gslb.pphosted.com
    #11
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: s1 (1024 bits), s2 (1024 bits). Rotate to a 2048-bit key.
    #23
  • !
    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

Recent checks

!

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