SurfaceMap › p › postnl.nl

postnl.nl

Checked 2026-10-21 21:24 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: a1-6.akam.net: "41824.8"; a1-6.akam.net: "41824.7"; a13-67.akam.net: "41824.10"; a13-67.akam.net: "41824.8"; a14-64.akam.net: "48878.33"; a14-64.akam.net: "48878.32"; a18-65.akam.net: "48878.33"; a18-65.akam.net: "48878.32"; a2-66.akam.net: "48878.26"; a2-66.akam.net: "48878.29"; a3-67.akam.net: "41824.10"; a3-67.akam.net: "41824.6". 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 2h; resolvers may use either.
    #32

Recent checks

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Mail

warn

33 passed 3 warn 0 failed

Areas

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

Problems

  • !
    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 71h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-24T20:28:48Z (in 71h0m0s). 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), s2 (1024 bits). Rotate to a 2048-bit key.
    #23

Recent checks

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