Mail domain report: ngv.nl

SPF

pass

SPF record published

Found

Record: v=spf1 a mx a:c25003-p1.proxhost.nl a:spf.flexfilter.nl include:spf.datab.nl ip4:109.70.4.46 -all
DNS lookups: 5 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 5 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

warn

p=reject (_dmarc.ngv.nl)

Found

Record: v=DMARC1; p=reject; fo=1; rua=mailto:7a23ca87@mxtoolbox.dmarc-report.com,mailto@brevo.com; ruf=mailto:7a23ca87@forensics.dmarc-report.com;
Found at: _dmarc.ngv.nl
External report address: mailto:7a23ca87@mxtoolbox.dmarc-report.com (authorized)
External report address: mailto@brevo.com (only mailto: report addresses are supported by receivers)
External report address: mailto:7a23ca87@forensics.dmarc-report.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:7a23ca87@mxtoolbox.dmarc-report.com,mailto@brevo.com	Aggregate report addresses
ruf	mailto:7a23ca87@forensics.dmarc-report.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:7a23ca87@mxtoolbox.dmarc-report.com, mailto@brevo.com
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
!

Unsupported report address

Receivers only send reports to mailto: addresses: mailto@brevo.com.

#29

DKIM

warn

Selectors: mail

Found

Selectors: mail
_domainkey: NOERROR

Selector	Key	Flags
mail	public key is not valid base64

Checks

✓ Keys found: mail #7

DKIM keys found for this domain with selectors: mail
!

Unreadable DKIM key

These keys could not be parsed, so signatures made with them will fail: mail (public key is not valid base64).

#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: 2371, 34505
Signatures valid until: 12 December 2026, 19:32 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 2026-12-12 #21

DNSKEY signatures are valid until 2026-12-12T19:32:18Z.

MX

pass

2 mail servers

Found

Priority	Host	Records	Reverse DNS
1	c25003-p1.proxhost.nl	A 5.9.87.245 AAAA 2a01:4f8:162:1231::2	c25003-p1.proxhost.nl ✓ c25003-p1.proxhost.nl ✓
20	proxhost.email	A 195.201.228.39 AAAA 2a01:4f8:1c1b:c42b::1	proxhost.email ✓ proxhost.email ✓

Checks

✓ 2 MX records #9

Found 2 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 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 4 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
c25003-p1.proxhost.nl	none	-
proxhost.email	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