Mail domain report: zwijndrecht.nl

SPF

info

SPF record published

Found

Record: v=spf1 redirect=3g1iqcb2._spf._d.mim.ec
DNS lookups: 3 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 3 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to 3g1iqcb2._spf._d.mim.ec, 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.zwijndrecht.nl)

Found

Record: v=DMARC1; p=reject; rua=mailto:890503487211378@rep.dmarcanalyzer.com,mailto:rapportages@dmarc.ibdgemeenten.nl; ruf=mailto:890503487211378@for.dmarcanalyzer.com; pct=100; sp=reject; fo=1;
Found at: _dmarc.zwijndrecht.nl
External report address: mailto:890503487211378@rep.dmarcanalyzer.com (authorized)
External report address: mailto:rapportages@dmarc.ibdgemeenten.nl (authorized)
External report address: mailto:890503487211378@for.dmarcanalyzer.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
sp	reject	Subdomain policy
pct	100	Percentage of mail the policy applies to
rua	mailto:890503487211378@rep.dmarcanalyzer.com,mailto:rapportages@dmarc.ibdgemeenten.nl	Aggregate report addresses
ruf	mailto:890503487211378@for.dmarcanalyzer.com	Failure report addresses
fo	1	Failure reporting options

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:890503487211378@rep.dmarcanalyzer.com, mailto:rapportages@dmarc.ibdgemeenten.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

Selectors: k1, selector1, s1, s2

Found

Selectors: k1, selector1, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
k1	RSA 1024 bits
selector1	RSA 1024 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: k1, selector1, s1, s2 #7

DKIM keys found for this domain with selectors: k1, selector1, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: k1 (1024 bits), selector1 (1024 bits), s2 (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 (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 52464, 10843
Signatures valid until: 5 November 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 2026-11-05 #21

DNSKEY signatures are valid until 2026-11-05T00:00:00Z.

MX

pass

4 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mailfilters.ezorg.nl	A 37.9.218.13 A 37.9.218.12 A 37.9.218.11 A 37.9.218.14 AAAA 2a07:b701:0:50::14 AAAA 2a07:b701:0:50::12 AAAA 2a07:b701:0:50::11 AAAA 2a07:b701:0:50::13	halonfilter03.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter01.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter01.ezorg.nl ✓ halonfilter03.ezorg.nl ✓
20	mailfilter01.ezorg.nl	A 37.9.218.11 A 37.9.218.12 AAAA 2a07:b701:0:50::11 AAAA 2a07:b701:0:50::12	halonfilter01.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter01.ezorg.nl ✓ halonfilter02.ezorg.nl ✓
30	mailfilter02.ezorg.nl	A 37.9.218.13 A 37.9.218.14 AAAA 2a07:b701:0:50::13 AAAA 2a07:b701:0:50::14	halonfilter03.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter03.ezorg.nl ✓ halonfilter04.ezorg.nl ✓
40	mailfilter03.ezorg.nl	A 37.9.218.14 A 37.9.218.12 AAAA 2a07:b701:0:50::14 AAAA 2a07:b701:0:50::12	halonfilter04.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter02.ezorg.nl ✓

Checks

✓ 4 MX records #9

Found 4 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 4 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 4 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 20 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 4 of 4 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mailfilters.ezorg.nl	3 1 1 c46267711cf16d7f…	Yes
mailfilter01.ezorg.nl	3 1 1 c46267711cf16d7f…	Yes
mailfilter02.ezorg.nl	3 1 1 c46267711cf16d7f…	Yes
mailfilter03.ezorg.nl	3 1 1 c46267711cf16d7f…	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 4 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