Mail domain report: vwa.nl

SPF

pass

SPF record published

Found

Record: v=spf1 include:_spf.dictu.nl include:amazonses.com -all
DNS lookups: 2 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 2 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.vwa.nl)

Found

Record: v=DMARC1;p=reject;sp=reject;pct=100;rua=mailto:dmarc@dictu.nl;
Found at: _dmarc.vwa.nl
External report address: mailto:dmarc@dictu.nl (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:dmarc@dictu.nl	Aggregate report addresses

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@dictu.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

pass

Selectors: default, dkim, mail, email, k1, selector1, selector2, google, zoho, mx, key, mta, pm, dkim-smtp, s1, s2

Found

Selectors: default, dkim, mail, email, k1, selector1, selector2, google, zoho, mx, key, mta, pm, dkim-smtp, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
default	revoked
dkim	revoked
mail	revoked
email	revoked
k1	revoked
selector1	RSA 2048 bits
selector2	RSA 2048 bits
google	revoked
zoho	revoked
mx	revoked
key	revoked
mta	revoked
pm	revoked
dkim-smtp	revoked
s1	revoked
s2	revoked

Checks

✓ Keys found: default, dkim, mail, email, k1, selector1, selector2, google, zoho, mx, key, mta, pm, dkim-smtp, s1, s2 #7

DKIM keys found for this domain with selectors: default, dkim, mail, email, k1, selector1, selector2, google, zoho, mx, key, mta, pm, dkim-smtp, s1, s2
✓ Strong keys #23

DKIM keys are strong enough: selector1: RSA 2048 bits; selector2: RSA 2048 bits.
✓ No problematic flags #24

No test mode or SHA-1-only keys. Revoked keys (empty p=), which is fine after a key rotation: default, dkim, mail, email, k1, google, zoho, mx, key, mta, pm, dkim-smtp, s1, s2.

DNSSEC

warn

Signed, DS published at parent

Found

DNSKEY records: Yes (5)
DS at parent: Yes
Algorithms: RSASHA256 (8), ECDSAP256SHA256 (13)
Key tags: 55819, 38949, 6461, 50731, 54684
Signatures valid until: 25 October 2026, 20:50 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 expire in 76h0m0s

DNSKEY signatures expire at 2026-10-25T20:50:16Z (in 76h0m0s). Check that re-signing works.

#21

MX

pass

4 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mail02.dictu.nl	A 145.12.216.26 AAAA 2a04:9a00:1021:201a::2	mail02.dictu.nl ✓ mail02.dictu.nl ✓
10	mail04.dictu.nl	A 145.69.216.26 AAAA 2a04:9a00:1022:201a::2	mail04.dictu.nl ✓ mail04.dictu.nl ✓
20	mail01.dictu.nl	A 145.12.216.25 AAAA 2a04:9a00:1021:201a::1	mail01.dictu.nl ✓ mail01.dictu.nl ✓
20	mail03.dictu.nl	A 145.69.216.25 AAAA 2a04:9a00:1022:201a::1	mail03.dictu.nl ✓ mail03.dictu.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 8 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
mail02.dictu.nl	3 1 1 4e9f867b22723b6c… 2 1 1 957b778a9e65927b… 3 1 1 7625cd24f983e1d6…	Yes
mail04.dictu.nl	3 1 1 7625cd24f983e1d6… 3 1 1 4e9f867b22723b6c… 2 1 1 957b778a9e65927b…	Yes
mail01.dictu.nl	2 1 1 957b778a9e65927b… 3 1 1 4e9f867b22723b6c… 3 1 1 7625cd24f983e1d6…	Yes
mail03.dictu.nl	2 1 1 957b778a9e65927b… 3 1 1 4e9f867b22723b6c… 3 1 1 7625cd24f983e1d6…	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