Mail domain report: ebnerstolz.de

SPF

info

SPF record published

Found

Record: v=spf1 redirect=ebnerstolz.de.spf.hornetdmarc.com
DNS lookups: 6 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 6 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to ebnerstolz.de.spf.hornetdmarc.com, whose policy applies.

#3
✓ 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.ebnerstolz.de)

Found

Record: v=DMARC1; p=reject; pct=100; fo=1:0; rua=mailto:a.feurlxmu@reports.hornetdmarc.com; ruf=mailto:rsmebnerstolz1@eu.cp-dmarc.com
Found at: _dmarc.ebnerstolz.de
External report address: mailto:a.feurlxmu@reports.hornetdmarc.com (authorized)
External report address: mailto:rsmebnerstolz1@eu.cp-dmarc.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:a.feurlxmu@reports.hornetdmarc.com	Aggregate report addresses
ruf	mailto:rsmebnerstolz1@eu.cp-dmarc.com	Failure report addresses
fo	1:0	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:a.feurlxmu@reports.hornetdmarc.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: dkim

Found

Selectors: dkim
_domainkey: NOERROR

Selector	Key	Flags
dkim	RSA 2048 bits

Checks

✓ Keys found: dkim #7

DKIM keys found for this domain with selectors: dkim
✓ Strong keys #23

DKIM keys are strong enough: dkim: 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: 18565, 64651
Signatures valid until: 1 December 2026, 04:00 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 2026-12-01 #21

DNSKEY signatures are valid until 2026-12-01T04:00:27Z.

MX

warn

4 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mx01.hornetsecurity.com	A 94.100.132.8	mx01.hornetsecurity.com ✓
20	mx02.hornetsecurity.com	A 94.100.136.8	mx02.hornetsecurity.com ✓
30	mx03.hornetsecurity.com	A 94.100.134.8	mx03.hornetsecurity.com ✓
40	mx04.hornetsecurity.com	A 94.100.136.7	mx04.hornetsecurity.com ✓

Checks

✓ 4 MX records #9

Found 4 MX records for this domain.
✓ All hosts resolve #10

All MX records resolve to valid IP addresses.
!

Hosts without IPv6

The following MX hosts could not be resolved to IPv6 addresses: mx01.hornetsecurity.com, mx02.hornetsecurity.com, mx03.hornetsecurity.com, mx04.hornetsecurity.com

#11
✓ 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 4 MX addresss have a PTR record that resolves back to them.

TLS

info

MTA-STS enforce · TLS-RPT · DANE on 0 of 4 MX hosts

Found

MTA-STS record: v=STSv1; id=1744027686
Policy URL: https://mta-sts.ebnerstolz.de/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: mx03.hornetsecurity.com, mx02.hornetsecurity.com, mx01.hornetsecurity.com, mx04.hornetsecurity.com
Max age: 604800 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:reports@reports.hornetdmarc.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx01.hornetsecurity.com	none	-
mx02.hornetsecurity.com	none	-
mx03.hornetsecurity.com	none	-
mx04.hornetsecurity.com	none	-

Checks

✓ Record published #32

MTA-STS record found with id 1744027686.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 168h0m0s.
✓ All MX hosts covered #34

Every MX host matches an mx: line of the MTA-STS policy.
✓ Reports enabled #35

TLS reports are sent to: mailto:reports@reports.hornetdmarc.com
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