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iss.nl

Checked 2026-10-22 14:00 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

26 passed 1 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration ✓Delegation iNameservers iSOA !DNSSEC iRecords

Problems

  • !
    NSEC3 with extra iterations or salt
    DNSSEC · NSEC3 uses 10 iterations and a 13-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 iss.nl ›

Mail

warn

29 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
  • !
    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 79h0m0s
    DNSSEC · DNSKEY signatures expire at 2026-10-25T21:11:47Z (in 79h0m0s). 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
  • !
    Policy in testing mode
    TLS · With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.
    #33

Recent checks

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Full report

Mail report for iss.nl ›