Mail domain report: zabun.be

SPF

pass

SPF record published

Found

Record: v=spf1 include:spf.protection.outlook.com include:spf.zabun.be include:eu.mailgun.org include:spf.flexmail.eu ip4:93.94.111.0/24 ip4:178.23.41.0/24 include:_spf.createsend.com include:spf.turbo-smtp.com include:spf.zoho.eu include:eu.transmail.net include:mail.zendesk.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

pass

p=reject (_dmarc.zabun.be)

Found

Record: v=DMARC1; p=reject; sp=reject; adkim=s; aspf=s; rua=mailto:dmarc-report@dns-mailserver.com; ruf=mailto:forensics.dmarc-report@dns-mailserver.com; fo=1
Found at: _dmarc.zabun.be
External report address: mailto:dmarc-report@dns-mailserver.com (authorized)
External report address: mailto:forensics.dmarc-report@dns-mailserver.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
sp	reject	Subdomain policy
rua	mailto:dmarc-report@dns-mailserver.com	Aggregate report addresses
ruf	mailto:forensics.dmarc-report@dns-mailserver.com	Failure report addresses
adkim	s	DKIM alignment (r = relaxed, s = strict)
aspf	s	SPF alignment (r = relaxed, s = strict)
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:dmarc-report@dns-mailserver.com
✓ 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, selector1

Found

Selectors: default, selector1
_domainkey: NOERROR

Selector	Key	Flags
default	RSA 2048 bits	h=sha256
selector1	RSA 2048 bits

Checks

✓ Keys found: default, selector1 #7

DKIM keys found for this domain with selectors: default, selector1
✓ Strong keys #23

DKIM keys are strong enough: default: RSA 2048 bits; selector1: RSA 2048 bits.
✓ 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: 14 December 2026, 02:48 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 2026-12-14 #21

DNSKEY signatures are valid until 2026-12-14T02:48:42Z.

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
0	zabun-be.mail.protection.outlook.com	A 52.101.68.8 A 52.101.103.143 A 52.101.68.21 A 52.101.68.25 AAAA 2a01:111:f403:ca3c::a AAAA 2a01:111:f403:ca04::f AAAA 2a01:111:f403:ca21::a AAAA 2a01:111:f403:ca09::22	mail-du0pr03cu00100.inbound.protection.outlook.com ✓ mail-miypr03cu00107.inbound.protection.outlook.com ✓ mail-db4pr02cu00205.inbound.protection.outlook.com ✓ mail-db8pr02cu00101.inbound.protection.outlook.com ✓ mail-zrxpr07cu00102.inbound.protection.outlook.com ✓ mail-db7pr03cu00507.inbound.protection.outlook.com ✓ mail-maspr04cu00102.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
zabun-be.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

warn

https://bimi.zabun.be/zabun.svg

Found

Record: v=BIMI1; l=https://bimi.zabun.be/zabun.svg
Found at: default._bimi.zabun.be
Logo: https://bimi.zabun.be/zabun.svg

Checks

!

No certificate (a=)

The logo is published without a Verified Mark Certificate. Gmail and Apple Mail only show BIMI logos with a VMC or CMC; Yahoo shows it without one.

#38
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.