Mail domain report: douane.nl

SPF

info

SPF record published

Found

Record: v=spf1 redirect=_spf.belastingdienst.nl
DNS lookups: 2 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✓ 2 of 10 DNS lookups #2

SPF record needs 2 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to _spf.belastingdienst.nl, whose policy applies.

#3
✓ Record published #6

SPF record exists for this domain.
✓ Single record #16

Exactly one SPF record is published.
✓ Valid syntax #25

All SPF mechanisms and modifiers are valid.
✓ No void lookups #26

All include/redirect targets exist.
✓ No overly broad IP ranges #27

All ip4/ip6 ranges are narrow enough.

DMARC

pass

p=reject (_dmarc.douane.nl)

Found

Record: v=DMARC1; p=reject; rua=mailto:dmarc.rua@belastingdienst.nl; sp=reject;
Found at: _dmarc.douane.nl
External report address: mailto:dmarc.rua@belastingdienst.nl (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
sp	reject	Subdomain policy
rua	mailto:dmarc.rua@belastingdienst.nl	Aggregate report addresses

Checks

✓ Policy: reject #4

DMARC policy is set to 'reject', which provides the strongest protection against email spoofing.
✓ Record published #5

DMARC record exists for this domain.
✓ Valid syntax #17

DMARC record syntax is valid.
✓ Applies to 100% of mail #18

DMARC policy applies to all failing mail.
✓ Aggregate reports enabled #19

Aggregate reports are sent to: mailto:dmarc.rua@belastingdienst.nl
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

No keys found under the checked selectors

Found

Selectors: None found
_domainkey: NOERROR

Checks

!

No key under common selectors

The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

#7

DNSSEC

warn

Signed, DS published at parent

Found

DNSKEY records: Yes (5)
DS at parent: Yes
Algorithms: RSASHA256 (8)
Key tags: 47296, 61024, 5188, 32351, 17181
Signatures valid until: 25 October 2026, 20:12 UTC

Checks

✓ Signed, DS published at parent #8

DNSSEC is enabled for this domain (DNSKEY and DS present), providing additional security for DNS lookups.
!

Signatures expire in 95h0m0s

DNSKEY signatures expire at 2026-10-25T20:12:41Z (in 95h0m0s). Check that re-signing works.

#21

MX

pass

2 mail servers

Found

Priority	Host	Records	Reverse DNS
10	smtp1.belastingdienst.nl	A 85.159.97.15 AAAA 2a04:9a01:1002:4::2	smtp1.belastingdienst.nl ✓ smtp1.belastingdienst.nl ✓
10	smtp2.belastingdienst.nl	A 85.159.101.15 AAAA 2a04:9a01:1002:4::3	smtp2.belastingdienst.nl ✓ smtp2.belastingdienst.nl ✓

Checks

✓ 2 MX records #9

Found 2 MX records for this domain.
✓ All hosts resolve #10

All MX records resolve to valid IP addresses.
✓ All hosts have IPv6 #11

All MX records resolve to IPv6 addresses.
✓ Redundant MX hosts #12

Found 2 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 2 MX records, which is within the recommended range (1-5).
✓ No localhost targets #14

No MX records pointing to localhost found.
✓ No private IP addresses #15

No MX records resolving to private IP addresses found.
✓ No CNAME targets #22

No MX records point to a CNAME.
✓ Reverse DNS confirmed #30

All 4 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 2 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
smtp1.belastingdienst.nl	3 1 1 71ce5fa19f1880f4… 3 1 1 b7663e408a68edc7…	Yes
smtp2.belastingdienst.nl	3 1 1 e916ced78e438a79… 3 1 1 79fec47c051470e4…	Yes

Checks

!

Not configured

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
!

Not configured

MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".

#35
✓ DANE on all MX hosts #36

All 2 MX hosts publish DNSSEC-validated TLSA records.

BIMI

pass

https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.svg

Found

Record: v=BIMI1;l=https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.svg;a=https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.pem
Found at: default._bimi.douane.nl
Logo: https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.svg
Certificate: https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.svg; certificate: https://vmc.digicert.eu/484c2be3-0dee-4406-994d-b3efdcaac8f8.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.