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lumc.nl

Checked 2026-10-21 21:22 UTC · first added 2026-10-21
!Passed with warnings Score 88 of 100

Domain & DNS

warn

30 passed 1 warn 0 failed

Areas

iRegistration ✓Delegation iNameservers ✓SOA !DNSSEC ✓Records

Problems

  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 10 iterations and a 6-byte salt. RFC 9276 recommends 0 iterations and no salt: extra iterations cost resolvers CPU and add no real protection, and some validators treat high counts as insecure.
    #31

Recent checks

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Full report

Domain & DNS report for lumc.nl ›

Mail

warn

31 passed 3 warn 0 failed

Areas

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

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 73h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-24T22:21:06Z (in 73h0m0s). Check that re-signing works.
    #21
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), selector1 (1024 bits), s2 (1024 bits). Rotate to a 2048-bit key.
    #23

Recent checks

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Full report

Mail report for lumc.nl ›