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oad.nl

Checked 2026-10-22 15:01 UTC · first added 2026-10-21
!Check could not complete

Domain & DNS

error

27 passed 1 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration iDelegation ✓Nameservers !SOA ✓DNSSEC iRecords

Problems

  • !
    Unusual SOA timers
    SOA · expire 4d is shorter than 7d; secondaries stop answering too soon when the primary is down. Current values: refresh 3h, retry 30m, expire 4d, negative TTL 12h.
    #23

Recent checks

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Mail

fail

25 passed 4 warn 1 failed

Areas

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

Problems

  • ✗
    17 DNS lookups, over the limit of 10
    SPF · SPF record needs 17 DNS lookups (including nested includes), more than the limit of 10. Receivers will return a permerror; reduce includes or flatten the record.
    #2
  • !
    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
  • !
    Hosts without IPv6
    MX · The following MX hosts could not be resolved to IPv6 addresses: mx.sendgrid.net
    #11
  • !
    1024-bit DKIM key
    DKIM · 1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits), selector1 (1024 bits), selector2 (1024 bits), s2 (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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