Mail domain report: ncsc.nl

SPF

pass

SPF record published

Found

Record: v=spf1 a mx include:_spf-jb3.minjenv.nl include:_dto.ncsc.nl include:_apps.ncsc.nl -all
DNS lookups: 5 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 5 DNS lookups (limit is 10).
✓ Ends with -all #3

SPF record properly uses -all to restrict unauthorized senders.
✓ 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

warn

p=reject (_dmarc.ncsc.nl)

Found

Record: v=DMARC1; p=reject; psd=n; rua=dmarc-reports@ncsc.nl;
Found at: _dmarc.ncsc.nl
External report address: dmarc-reports@ncsc.nl (only mailto: report addresses are supported by receivers)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	dmarc-reports@ncsc.nl	Aggregate report addresses
psd	n

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: dmarc-reports@ncsc.nl
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
!

Unsupported report address

Receivers only send reports to mailto: addresses: dmarc-reports@ncsc.nl.

#29

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

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (1)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 31962
Signatures valid until: 29 October 2026, 00:00 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 valid until 2026-10-29 #21

DNSKEY signatures are valid until 2026-10-29T00:00:00Z.

MX

pass

3 mail servers

Found

Priority	Host	Records	Reverse DNS
5	mx.ncsc.nl	A 147.181.62.13 A 147.181.63.13 AAAA 2a04:9a00:1112:700::1:2 AAAA 2a04:9a00:1110:700::1:2	mx1.ncsc.nl ✓ mx2.ncsc.nl ✓ mx2.ncsc.nl ✓ mx1.ncsc.nl ✓
15	mx1.ncsc.nl	A 147.181.62.13 AAAA 2a04:9a00:1110:700::1:2	mx1.ncsc.nl ✓ mx1.ncsc.nl ✓
20	mx2.ncsc.nl	A 147.181.63.13 AAAA 2a04:9a00:1112:700::1:2	mx2.ncsc.nl ✓ mx2.ncsc.nl ✓

Checks

✓ 3 MX records #9

Found 3 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 3 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 3 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 8 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 3 of 3 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx.ncsc.nl	3 1 1 c21de17ba21e58e2… 2 1 1 62e6eec9c954fd2a… 3 1 1 2560a115e0f0fdcc… 2 1 1 1d6e24b6991b73ab…	Yes
mx1.ncsc.nl	2 1 1 1d6e24b6991b73ab… 3 1 1 2560a115e0f0fdcc… 3 1 1 c21de17ba21e58e2… 2 1 1 62e6eec9c954fd2a…	Yes
mx2.ncsc.nl	2 1 1 62e6eec9c954fd2a… 3 1 1 c21de17ba21e58e2… 2 1 1 1d6e24b6991b73ab… 3 1 1 2560a115e0f0fdcc…	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 3 MX hosts publish DNSSEC-validated TLSA records.

BIMI

info

No BIMI record

Checks

i

Not configured

BIMI shows your logo next to your mail in supporting mail clients. It requires DMARC enforcement.

#38