Mail domain report: slingeland.nl

SPF

pass

SPF record published

Found

Record: v=spf1 include:_spf.zivver.com a include:_spf.ezorg.nl include:spf.protection.outlook.com include:_spf.exonet.nl ip4:51.105.127.9 ip4:84.22.96.44 ip4:5.178.114.132 include:pulseweb.nl ip4:109.72.83.148 ip4:185.181.140.91 -all
DNS lookups: 9 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 9 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

fail

p=none (_dmarc.slingeland.nl)

Found

Record: v=DMARC1; p=none; rua=mailto:serverbeheer@slingeland.nl
Found at: _dmarc.slingeland.nl

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:serverbeheer@slingeland.nl	Aggregate report addresses

Checks

✗

Policy: none (monitoring only)

DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.

#4
✓ Record published #5

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

DMARC record syntax is valid.
✓ Aggregate reports enabled #19

Aggregate reports are sent to: mailto:serverbeheer@slingeland.nl
✓ 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

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (1)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 23250
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 37.9.218.11 A 37.9.218.14 A 37.9.218.12 A 37.9.218.13 AAAA 2a07:b701:0:50::14 AAAA 2a07:b701:0:50::13 AAAA 2a07:b701:0:50::12 AAAA 2a07:b701:0:50::11	halonfilter01.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter03.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter03.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter01.ezorg.nl ✓
20	mailfilter01.ezorg.nl	A 37.9.218.12 A 37.9.218.11 AAAA 2a07:b701:0:50::12 AAAA 2a07:b701:0:50::11	halonfilter02.ezorg.nl ✓ halonfilter01.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter01.ezorg.nl ✓
30	mailfilter02.ezorg.nl	A 37.9.218.14 A 37.9.218.13 AAAA 2a07:b701:0:50::13 AAAA 2a07:b701:0:50::14	halonfilter04.ezorg.nl ✓ halonfilter03.ezorg.nl ✓ halonfilter03.ezorg.nl ✓ halonfilter04.ezorg.nl ✓
40	mailfilter03.ezorg.nl	A 37.9.218.12 A 37.9.218.14 AAAA 2a07:b701:0:50::12 AAAA 2a07:b701:0:50::14	halonfilter02.ezorg.nl ✓ halonfilter04.ezorg.nl ✓ halonfilter02.ezorg.nl ✓ halonfilter04.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