Mail domain report: hvv.de

SPF

pass

SPF record published

Found

Record: v=spf1 mx ip4:185.91.106.64/28 ip4:178.77.121.128/26 ip4:185.5.24.0/23 ip6:2a01:be80:8100:4::/64 ip4:212.12.39.194 ip4:213.238.45.78 include:spf.hornetsecurity.com include:spf.protection.outlook.com include:spf.crsend.com include:spf.flowmailer.net ~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

warn

p=quarantine (_dmarc.hvv.de)

Found

Record: v=DMARC1; p=quarantine; rua=mailto:postmaster@power-from-the-eastside.com,mailto:dmarc@inbound.flowmailer.net; ruf=mailto:postmaster@power-from-the-eastside.com,mailto:dmarc@inbound.flowmailer.net; pct=100; fo=1;
Found at: _dmarc.hvv.de
External report address: mailto:postmaster@power-from-the-eastside.com (authorized)
External report address: mailto:dmarc@inbound.flowmailer.net (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:postmaster@power-from-the-eastside.com,mailto:dmarc@inbound.flowmailer.net	Aggregate report addresses
ruf	mailto:postmaster@power-from-the-eastside.com,mailto:dmarc@inbound.flowmailer.net	Failure report addresses
fo	1	Failure reporting options

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:postmaster@power-from-the-eastside.com, mailto:dmarc@inbound.flowmailer.net
✓ 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: s1, s2

Found

Selectors: s1, s2
_domainkey: NOERROR

Selector	Key	Flags
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: s1, s2 #7

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

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: 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 (2)
DS at parent: Yes
Algorithms: RSASHA256 (8)
Key tags: 49410, 7555
Signatures valid until: 15 November 2026, 14:23 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 2026-11-15 #21

DNSKEY signatures are valid until 2026-11-15T14:23:51Z.

MX

warn

4 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mx01.hornetsecurity.com	A 94.100.132.8	mx01.hornetsecurity.com ✓
10	mx02.hornetsecurity.com	A 94.100.136.8	mx02.hornetsecurity.com ✓
10	mx03.hornetsecurity.com	A 94.100.134.8	mx03.hornetsecurity.com ✓
10	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

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 4 MX hosts

Found

DANE (TLSA records)

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

pass

https://www.hvv.de/media/logos/hvv/hvv_hamburger_verkehrsverbund__gmbh_748774592.svg

Found

Record: v=BIMI1; l=https://www.hvv.de/media/logos/hvv/hvv_hamburger_verkehrsverbund__gmbh_748774592.svg; a=https://www.hvv.de/media/hvv_hamburger_verkehrsverbund__gmbh_748774592.pem;
Found at: default._bimi.hvv.de
Logo: https://www.hvv.de/media/logos/hvv/hvv_hamburger_verkehrsverbund__gmbh_748774592.svg
Certificate: https://www.hvv.de/media/hvv_hamburger_verkehrsverbund__gmbh_748774592.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://www.hvv.de/media/logos/hvv/hvv_hamburger_verkehrsverbund__gmbh_748774592.svg; certificate: https://www.hvv.de/media/hvv_hamburger_verkehrsverbund__gmbh_748774592.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.