belastingdienst.nl

Checked 21 October 2026, 20:45 UTC · via 8.8.8.8
!Passed with warnings
30 passed 3 warnings 0 failed 1 info

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.belastingdienst.nl)

Found

Record
v=DMARC1; p=reject; rua=mailto:dmarc.rua@belastingdienst.nl; sp=reject;
Found at
_dmarc.belastingdienst.nl
TagValueMeaning
vDMARC1Version
prejectPolicy
sprejectSubdomain policy
ruamailto:dmarc.rua@belastingdienst.nlAggregate 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'.
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

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
32913, 46776, 45913, 32732, 15979
Signatures valid until
24 October 2026, 21:42 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 73h0m0s
    DNSKEY signatures expire at 2026-10-24T21:42:15Z (in 73h0m0s). Check that re-signing works.
    #21

MX

pass

2 mail servers

Found

PriorityHostRecordsReverse DNS
10smtp1.belastingdienst.nlA 85.159.97.15 AAAA 2a04:9a01:1002:4::2smtp1.belastingdienst.nl ✓ smtp1.belastingdienst.nl ✓
10smtp2.belastingdienst.nlA 85.159.101.15 AAAA 2a04:9a01:1002:4::3smtp2.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

MTA-STS testing · TLS-RPT · DANE on 2 of 2 MX hosts

Found

MTA-STS record
v=STSv1; id=20190624163600
Policy URL
https://mta-sts.belastingdienst.nl/.well-known/mta-sts.txt
Mode
testing
Allowed MX
smtp1.belastingdienst.nl, smtp2.belastingdienst.nl, smtp11.belastingdienst.nl, smtp12.belastingdienst.nl, mailer1.belastingdienst.nl, mailer2.belastingdienst.nl
Max age
86400 seconds
TLS-RPT record
v=TLSRPTv1; rua=mailto:mta-sts@belastingdienst.nl

DANE (TLSA records)

MX hostTLSADNSSEC
smtp1.belastingdienst.nl3 1 1 b7663e408a68edc7… 3 1 1 71ce5fa19f1880f4…Yes
smtp2.belastingdienst.nl3 1 1 79fec47c051470e4… 3 1 1 e916ced78e438a79…Yes

Checks

  • ✓ Record published #32
    MTA-STS record found with id 20190624163600.
  • !
    Policy in testing mode
    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
  • ✓ All MX hosts covered #34
    Every MX host matches an mx: line of the MTA-STS policy.
  • ✓ Reports enabled #35
    TLS reports are sent to: mailto:mta-sts@belastingdienst.nl
  • ✓ DANE on all MX hosts #36
    All 2 MX hosts publish DNSSEC-validated TLSA records.

BIMI

pass

https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.svg

Found

Record
v=BIMI1;l=https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.svg;a=https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.pem
Found at
default._bimi.belastingdienst.nl
Logo
https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.svg
Certificate
https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.pem

Checks

  • ✓ Logo and certificate published #38
    BIMI logo: https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.svg; certificate: https://vmc.digicert.eu/21f1c9f4-832a-4782-bb04-620805d23c17.pem
  • ✓ DMARC meets BIMI requirements #39
    DMARC is enforced on all mail, as BIMI requires.