Mail domain report: brandweer.nl

SPF

pass

SPF record published

Found

Record: v=spf1 +a +mx +a:sh01.net-ops.nl include:spf.mandrillapp.com ip4:80.73.130.230 ip4:178.128.249.130 -all
DNS lookups: 4 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 4 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

pass

p=reject (_dmarc.brandweer.nl)

Found

Record: v=DMARC1; p=reject; pct=100; ri=86400; rua=mailto:info@brandweer.nl
Found at: _dmarc.brandweer.nl

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:info@brandweer.nl	Aggregate report addresses
ri	86400	Report interval (seconds)

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:info@brandweer.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

Selectors: default

Found

Selectors: default
_domainkey: NOERROR

Selector	Key	Flags
default	RSA 1024 bits

Checks

✓ Keys found: default #7

DKIM keys found for this domain with selectors: default
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: default (1024 bits). Rotate to a 2048-bit key.

#23
✓ No problematic flags #24

No keys in test mode, revoked, or limited to SHA-1.

DNSSEC

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (4)
DS at parent: Yes
Algorithms: RSASHA256 (8)
Key tags: 55275, 3634, 34311, 21460
Signatures valid until: 31 October 2026, 06:58 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 2026-10-31 #21

DNSKEY signatures are valid until 2026-10-31T06:58:31Z.

MX

warn

5 mail servers

Found

Priority	Host	Records	Reverse DNS
0	filter01.networkoperations.nl	A 154.59.193.124 AAAA 2001:978:2:6::f:124	fe3-r3-in.du01.l.antispamcloud.com ✓ fe3-r3-in.du01.l.antispamcloud.com ✓
0	filter02.networkoperations.nl	A 149.13.75.27 AAAA 2001:978:2:7::162:100	fe1-r3-in.fra02.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓
0	filter03.networkoperations.nl	A 154.59.104.23 AAAA 2001:978:2:2c::137:100	fe2-r3-in.ams14.l.antispamcloud.com ✓ fe2-r3-in.ams14.l.antispamcloud.com ✓
0	filter04.networkoperations.nl	A 154.59.193.124 AAAA 2001:978:2:6::f:124	fe3-r3-in.du01.l.antispamcloud.com ✓ fe3-r3-in.du01.l.antispamcloud.com ✓
10	mail.brandweer.nl	A 80.73.130.10	sh01.net-ops.nl ✓

Checks

✓ 5 MX records #9

Found 5 MX records for this domain.
✓ All hosts resolve #10

All MX records resolve to valid IP addresses.
!

Hosts without IPv6

The following MX hosts could not be resolved to IPv6 addresses: mail.brandweer.nl

#11
✓ Redundant MX hosts #12

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

Found 5 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 9 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 5 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
filter01.networkoperations.nl	none	-
filter02.networkoperations.nl	none	-
filter03.networkoperations.nl	none	-
filter04.networkoperations.nl	none	-
mail.brandweer.nl	none	-

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
i

Not configured

TLS-RPT lets senders report TLS delivery problems to you. It is most useful together with MTA-STS or DANE.

#35
i

Not used

No MX host publishes TLSA records. DANE lets senders verify your mail server's certificate through DNSSEC; it requires DNSSEC on the MX host's zone.

#36

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