Mail domain report: cecil.de

SPF

pass

SPF record published

Found

Record: v=spf1 include:spf.cbr-mx.de include:cust-spf.exacttarget.com -all
DNS lookups: 3 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 3 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.cecil.de)

Found

Record: v=DMARC1; p=quarantine; sp=quarantine; rua=mailto:rua@cbr-mx.de; ruf=mailto:ruf@cbr-mx.de; rf=afrf; ri=86400;
Found at: _dmarc.cecil.de
External report address: mailto:rua@cbr-mx.de (authorized)
External report address: mailto:ruf@cbr-mx.de (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
sp	quarantine	Subdomain policy
rua	mailto:rua@cbr-mx.de	Aggregate report addresses
ruf	mailto:ruf@cbr-mx.de	Failure report addresses
rf	afrf	Failure report format
ri	86400	Report interval (seconds)

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:rua@cbr-mx.de
✓ 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: selector1

Found

Selectors: selector1
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 1024 bits

Checks

✓ Keys found: selector1 #7

DKIM keys found for this domain with selectors: selector1
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: 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: 2371, 34505
Signatures valid until: 18 December 2026, 11:54 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 2026-12-18 #21

DNSKEY signatures are valid until 2026-12-18T11:54:24Z.

MX

warn

4 mail servers

Found

Priority	Host	Records	Reverse DNS
10	mx1.cbr-mx.de	A 193.158.40.45	mx1.cbr-mx.de ✓
10	mx2.cbr-mx.de	A 193.158.40.46	mx2.cbr-mx.de ✓
20	mx3.cbr-mx.de	A 40.68.156.177	mx3.cbr-mx.de ✓
20	mx4.cbr-mx.de	A 108.143.159.229	mx4.cbr-mx.de ✓

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: mx1.cbr-mx.de, mx2.cbr-mx.de, mx3.cbr-mx.de, mx4.cbr-mx.de

#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
mx1.cbr-mx.de	none	-
mx2.cbr-mx.de	none	-
mx3.cbr-mx.de	none	-
mx4.cbr-mx.de	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://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.svg

Found

Record: v=BIMI1;l=https://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.svg;a=https://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.pem
Found at: default._bimi.cecil.de
Logo: https://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.svg
Certificate: https://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.svg; certificate: https://vmc.digicert.eu/f25f746d-cf84-45c2-adbd-270c3144491c.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.