Mail domain report: rws.nl

SPF

pass

SPF record published

Found

Record: v=spf1 include:spf-a.rws.nl include:_spf.iprox.nl include:spf.mailjet.com include:spf.email.nl.postex.com include:spf-l.rws.nl ~all exp=explain._spf.rws.nl
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

pass

p=reject (_dmarc.rws.nl)

Found

Record: v=DMARC1; p=reject; rua=mailto:dmarc-reports@rws.nl; adkim=s;
Found at: _dmarc.rws.nl

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:dmarc-reports@rws.nl	Aggregate report addresses
adkim	s	DKIM alignment (r = relaxed, s = strict)

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-reports@rws.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: selector1

Found

Selectors: selector1
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 1024 bits

Checks

✓ Keys found: selector1 #7

DKIM keys found for this domain with selectors: selector1
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector1 (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 (1)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 13854
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

warn

2 mail servers

Found

Priority	Host	Records	Reverse DNS
10	relay-1.rws.nl	A 131.237.120.22	relay-1.rws.nl ✓
10	relay-2.rws.nl	A 131.237.120.24	relay-2.rws.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.
!

Hosts without IPv6

The following MX hosts could not be resolved to IPv6 addresses: relay-1.rws.nl, relay-2.rws.nl

#11
✓ 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 2 MX addresss have a PTR record that resolves back to them.

TLS

pass

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

Found

MTA-STS record: v=STSv1; id=20250123090000
Policy URL: https://mta-sts.rws.nl/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: relay-1.rws.nl, relay-2.rws.nl
Max age: 2419200 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:tls-rpt@rws.nl

DANE (TLSA records)

MX host	TLSA	DNSSEC
relay-1.rws.nl	3 1 1 3a037407087fda62… 3 1 1 5a956db3fc7e5b7f… 2 1 1 405afaebaf4e7cce… 2 1 1 957b778a9e65927b…	Yes
relay-2.rws.nl	3 1 1 5a956db3fc7e5b7f… 2 1 1 405afaebaf4e7cce… 2 1 1 957b778a9e65927b…	Yes

Checks

✓ Record published #32

MTA-STS record found with id 20250123090000.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 672h0m0s.
✓ 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:tls-rpt@rws.nl
✓ DANE on all MX hosts #36

All 2 MX hosts publish DNSSEC-validated TLSA records.

BIMI

pass

https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.svg

Found

Record: v=BIMI1; l=https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.svg; a=https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.pem
Found at: default._bimi.rws.nl
Logo: https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.svg
Certificate: https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.svg; certificate: https://vmc.digicert.eu/e65ba04e-834f-4c59-afd7-fb74c6b9969d.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.