SurfaceMap › c › cbs.nl

cbs.nl

Checked 2026-10-21 21:00 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

29 passed 2 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration ✓Delegation ✓Nameservers !SOA !DNSSEC ✓Records

Problems

  • !
    Unusual SOA timers
    SOA · refresh 15m is outside 20m–1d; expire 12h is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 15m, retry 10m, expire 12h, negative TTL 1d.
    #23
  • !
    Signatures expire soon
    DNSSEC · The earliest signature expires at 2026-10-24 14:47 UTC (in 66h0m0s). Check that automatic re-signing works.
    #30

Recent checks

!

Full report

Domain & DNS report for cbs.nl ›

Mail

warn

27 passed 5 warn 0 failed

Areas

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

Problems

  • !
    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
  • !
    Signatures expire in 66h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-24T14:47:00Z (in 66h0m0s). Check that re-signing works.
    #21
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (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
  • !
    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

!

Full report

Mail report for cbs.nl ›