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olvg.nl

Checked 2026-10-22 15:01 UTC · first added 2026-10-21

!Check could not complete

Domain & DNS

error

24 passed 3 warn 0 failed 1 errors

lookups failed for rdap; results are incomplete

Areas

iRegistration !Delegation ✓Nameservers ✓SOA !DNSSEC ✓Records

Problems

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Nameservers in one network

Delegation · all IPv4 addresses are in 194.13.75.0/24. A single network failure takes all nameservers down; RFC 2182 recommends topologically separate networks (anycast setups are an exception).

#10
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No IPv6

Delegation · None of the nameservers has an IPv6 address, so IPv6-only resolvers can't reach them.

#13
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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 olvg.nl ›

Mail

warn

25 passed 5 warn 0 failed

Areas

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

Problems

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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
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Hosts without IPv6

MX · The following MX hosts could not be resolved to IPv6 addresses: mx1.olvg.nl, mx2.olvg.nl

#11
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Signatures expire in 92h0m0s

DNSSEC · DNSKEY signatures expire at 2026-10-26T11:30:08Z (in 92h0m0s). Check that re-signing works.

#21
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1024-bit DKIM key

DKIM · 1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits), selector2 (1024 bits). Rotate to a 2048-bit key.

#23
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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 olvg.nl ›