Mail domain report: aok.de

SPF

pass

SPF record published

Found

Record: v=spf1 include:_spf.aok.de -all
DNS lookups: 1 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 1 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.aok.de)

Found

Record: v=DMARC1; p=quarantine; pct=100
Found at: _dmarc.aok.de

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
pct	100	Percentage of mail the policy applies to

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.
!

No aggregate reports (rua)

DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...

#19
✓ Subdomain policy: quarantine #20

Subdomains are covered by policy 'quarantine'.

DKIM

warn

No keys found under the checked selectors

Found

Selectors: None found
_domainkey: NOERROR

Checks

!

No key under common selectors

The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

#7

DNSSEC

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 29326, 36919
Signatures valid until: 30 October 2026, 11:13 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 2026-10-30 #21

DNSKEY signatures are valid until 2026-10-30T11:13:03Z.

MX

warn

2 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mx1.aok.de	A 217.110.254.8	mx1.aok.de ✓
10	mx2.aok.de	A 217.111.83.8	mx2.aok.de ✓

Checks

✓ 2 MX records #9

Found 2 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: mx1.aok.de, mx2.aok.de

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

TLS

warn

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

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx1.aok.de	3 1 1 2e660ff1b315ba67…	Yes
mx2.aok.de	3 1 1 2e660ff1b315ba67…	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
✓ DANE on all MX hosts #36

All 2 MX hosts publish DNSSEC-validated TLSA records.

BIMI

pass

https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.svg

Found

Record: v=BIMI1; l=https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.svg; a=https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.pem; avp=brand;
Found at: default._bimi.aok.de
Logo: https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.svg
Certificate: https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.svg; certificate: https://www.aok.de/pk/magazin/cms/fileadmin/brand/aok-bundesverband_gbr.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.