Mail domain report: mobiel.nl

SPF

pass

SPF record published

Found

Record: v=spf1 ip4:185.27.19.162 ip4:185.27.19.166 ip4:213.124.35.210 ip4:80.101.112.131 include:spf.omnidesk.com include:sendgrid.net include:spf.protection.outlook.com include:mail.zendesk.com -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

pass

p=reject (_dmarc.mobiel.nl)

Found

Record: v=DMARC1; p=reject; rua=mailto:dmarc@mobiel.nl; ruf=mailto:dmarc@mobiel.nl;
Found at: _dmarc.mobiel.nl

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:dmarc@mobiel.nl	Aggregate report addresses
ruf	mailto:dmarc@mobiel.nl	Failure 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@mobiel.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: default, dkim, selector1

Found

Selectors: default, dkim, selector1
_domainkey: NOERROR

Selector	Key	Flags
default	RSA 1024 bits
dkim	RSA 2048 bits	h=sha256
selector1	RSA 1024 bits

Checks

✓ Keys found: default, dkim, selector1 #7

DKIM keys found for this domain with selectors: default, dkim, selector1
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: default (1024 bits), 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 (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 31441, 25725
Signatures valid until: 5 November 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 2026-11-05 #21

DNSKEY signatures are valid until 2026-11-05T00:00:00Z.

MX

pass

2 mail servers

Found

Priority	Host	Records	Reverse DNS
0	mobiel-nl.mail.protection.outlook.com	A 52.101.103.140 A 52.101.68.27 A 52.101.91.162 A 52.101.73.145 AAAA 2a01:111:f403:c967::c AAAA 2a01:111:f403:ca09::a AAAA 2a01:111:f403:ca21::c AAAA 2a01:111:f403:ca04::d	mail-miypr02cu00204.inbound.protection.outlook.com ✓ mail-db7pr03cu00503.inbound.protection.outlook.com ✓ mail-matpr04cu00302.inbound.protection.outlook.com ✓ mail-am6pr02cu00301.inbound.protection.outlook.com ✓ mail-cpjpr05cu00204.inbound.protection.outlook.com ✓ mail-am7pr02cu00202.inbound.protection.outlook.com ✓ mail-matpr04cu00204.inbound.protection.outlook.com ✓ mail-db6pr03cu00105.inbound.protection.outlook.com ✓
20	relay.transip.nl	A 149.210.149.29 A 149.210.149.12 AAAA 2a01:7c8:7c8::29 AAAA 2a01:7c8:7c8::12	relay1.transip.nl ✓ relay0.transip.nl ✓ relay1.transip.nl ✓ relay0.transip.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.
✓ 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 12 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 1 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mobiel-nl.mail.protection.outlook.com	none	-
relay.transip.nl	3 1 1 80fd782020c5598d… 3 1 1 4be19b4f9ff6b128… 3 1 1 1326b5674d6cbd3f… 3 1 1 a83c48417a6006de…	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
!

Not all MX hosts use DANE

These MX hosts publish no TLSA records, so mail to them is not protected by DANE: mobiel-nl.mail.protection.outlook.com.

#36

BIMI

warn

https://www.mobiel.nl/images/bimi-icon.svg

Found

Record: v=BIMI1;l=https://www.mobiel.nl/images/bimi-icon.svg
Found at: default._bimi.mobiel.nl
Logo: https://www.mobiel.nl/images/bimi-icon.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.