SurfaceMap › r › rembrandthuis.nl

rembrandthuis.nl

Checked 2026-10-21 21:24 UTC · first added 2026-10-21
!Passed with warnings Score 82 of 100

Domain & DNS

warn

25 passed 2 warn 0 failed

Areas

iRegistration !Delegation !Nameservers ✓SOA iDNSSEC iRecords

Problems

  • !
    Glue differs from the zone
    Delegation · The addresses at the parent (glue) differ from the addresses in the zone: ns1.nextbuzz.nl (glue 178.62.223.145, 2a03:b0c0:2:d0::bad:3001, zone 178.62.223.145). Update the glue at your registrar.
    #8
  • !
    Software version disclosed
    Nameservers · These nameservers report their software version via version.bind/version.server, which helps attackers find known vulnerabilities: ns2.nextbuzz.nl: "9.18.39-0ubuntu0.22.04.7-Ubuntu"; ns3.nextbuzz.nl: "9.18.39-0ubuntu0.22.04.7-Ubuntu". Hide or replace the version string.
    #17

Recent checks

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Full report

Domain & DNS report for rembrandthuis.nl ›

Mail

warn

26 passed 4 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
  • !
    Single MX host, no backup
    MX · Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • !
    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

Recent checks

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Full report

Mail report for rembrandthuis.nl ›