Mail domain report: knvb.nl

SPF

pass

SPF record published

Found

Record: v=spf1 ip6:2a02:348:b4:e70b::1 ip4:34.105.97.52 ip4:34.74.92.186 ip4:34.89.171.151 ip4:34.90.134.143 ip4:5.39.185.40 ip4:34.90.145.140 ip4:35.198.110.229 ip4:34.90.40.234 ip4:34.159.131.87 ip4:34.34.77.208 ip4:34.105.64.154 ip4:34.75.4.19 ip4:35.246.159.116 ip4:217.114.97.6 ip4:176.62.196.142 ip4:80.112.253.130 ip4:185.46.182.1 ip4:185.46.182.200/29 ip4:185.46.182.208/31 ip4:31.134.203.164 ip4:31.134.203.165 ip4:31.134.203.166 ip4:31.134.203.188 ip4:172.104.250.102 ip4:31.134.203.248 ip4:31.134.203.249 ip4:208.72.90.0/24 ip4:74.117.207.0/24 ip4:74.117.206.70 ip4:217.114.99.36 ip4:217.114.99.37 ip4:217.114.99.38 ip4:217.114.99.43 ip4:217.114.99.55 ip4:217.114.99.57 ip4:217.18.68.165 ip4:159.135.230.45 ip4:83.138.181.0/24 ip4:168.128.66.6 ip4:83.98.197.35 ip4:46.31.50.212 ip4:37.0.95.137 ip4:149.210.144.179 ip4:85.222.231.11 ip4:185.64.33.133 ip4:185.64.35.133 ip4:213.144.242.0/28 ip4:89.146.30.0/27 ip4:213.144.234.160/27 ip4:46.44.162.254 ip4:89.146.1.51 ip4:89.146.1.52 ip4:89.146.1.63 ip4:46.44.142.238 ip4:89.146.1.57 ip4:89.146.63.164 ip4:91.218.37.0/24 ip4:185.46.182.201 ip4:46.31.48.0/21 ip6:2a02:22a0:0:1:2::2a ip6:2a02:22a0:0:1:2::2e ip6:2a02:22a0:0:2:2::12 ip6:2a02:22a0:0:1:2::2 ip6:2a02:22a0:0:1:2::5 ip6:2a02:22a0:0:2:2::5 ip6:2a02:348:b4:e70b::1 ip4:208.76.56.0/21 ip4:216.146.32.0/20 ip4:80.231.25.0/24 ip4:80.231.219.0/24 ip4:103.11.200.0/22 ip4:199.19.0.0/21 ip4:204.13.248.0/22 ip4:208.78.68.0/22 ip4:162.88.36.0/23 ip4:162.88.4.0/23 ip4:162.88.24.0/24 ip4:162.88.28.0/24 ip4:10.144.155.128/26 ip4:129.148.164.0/25 ip4:129.148.215.0/25 ip4:129.149.6.0/25 ip4:129.149.38.0/25 ip4:138.1.170.0/24 ip4:147.154.32.0/25 ip4:147.154.63.0/24 ip4:147.154.126.0/24 ip4:147.154.191.0/24 ip4:162.88.24.0/21 ip4:192.29.72.0/25 ip4:192.29.88.0/25 ip4:192.29.103.128/25 ip4:192.29.134.0/25 ip4:155.248.148.0/25 ip4:131.186.12.0/25 ip4:138.1.156.112 ip4:130.35.132.195 include:spf.protection.outlook.com include:spf.mandrillapp.com include:_spf.relay.mailprotect.be include:_spf.cobytes.email include:_spf1.mailgun.org include:_spf2.mailgun.org include:_spf.eu.mailgun.org include:sas.mail.e.sparkpost.com -all
DNS lookups: 10 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 10 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=quarantine (_dmarc.knvb.nl)

Found

Record: v=DMARC1; p=quarantine; rua=mailto:lo4vm8wk@ag.eu.dmarcadvisor.com
Found at: _dmarc.knvb.nl
External report address: mailto:lo4vm8wk@ag.eu.dmarcadvisor.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
rua	mailto:lo4vm8wk@ag.eu.dmarcadvisor.com	Aggregate report addresses

Checks

!

Policy: quarantine

DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

#4
✓ 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:lo4vm8wk@ag.eu.dmarcadvisor.com
✓ Subdomain policy: quarantine #20

Subdomains are covered by policy 'quarantine'.
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: selector1, s1, s2

Found

Selectors: selector1, s1, s2
_domainkey: NOERROR

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

Checks

✓ Keys found: selector1, s1, s2 #7

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

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: 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 (1)
DS at parent: Yes
Algorithms: RSASHA256 (8)
Key tags: 43885
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

1 mail server

Found

Priority	Host	Records	Reverse DNS
0	knvb-nl.mail.protection.outlook.com	A 52.101.68.27 A 52.101.103.36 A 52.101.185.24 A 52.101.68.10 AAAA 2a01:111:f403:ca48::a AAAA 2a01:111:f403:ca04::10 AAAA 2a01:111:f403:ca09::24 AAAA 2a01:111:f403:ca09::22	mail-db7pr03cu00503.inbound.protection.outlook.com ✓ mail-miypr05cu00104.inbound.protection.outlook.com ✓ mail-zrxpr07cu00100.inbound.protection.outlook.com ✓ mail-dbbpr03cu00102.inbound.protection.outlook.com ✓ mail-miypr02cu00202.inbound.protection.outlook.com ✓ mail-dbapr03cu00100.inbound.protection.outlook.com ✓ mail-am6pr02cu00204.inbound.protection.outlook.com ✓ mail-am7pr02cu00302.inbound.protection.outlook.com ✓

Checks

✓ 1 MX record #9

Found 1 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.
!

Single MX host, no backup

Only one MX record found. For better email reliability, consider adding at least one backup MX server.

#12
✓ At most 5 MX records #13

Found 1 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 0 of 1 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
knvb-nl.mail.protection.outlook.com	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