Mail domain report: notebooksbilliger.de

SPF

pass

SPF record published

Found

Record: v=spf1 mx include:spf1.nbb.com include:emarsys.net include:emsmtp.com include:spf.crsend.com include:spf.sosafe.de include:spf.tmes.trendmicro.eu -all
DNS lookups: 8 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 8 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.notebooksbilliger.de)

Found

Record: v=DMARC1; p=reject; adkim=r; aspf=s; rua=mailto:nbb@dmarcrua.tmes.trendmicro.eu; ruf=mailto:mailabuse.error@notebooksbilliger.de; rf=afrf; pct=100;
Found at: _dmarc.notebooksbilliger.de
External report address: mailto:nbb@dmarcrua.tmes.trendmicro.eu (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:nbb@dmarcrua.tmes.trendmicro.eu	Aggregate report addresses
ruf	mailto:mailabuse.error@notebooksbilliger.de	Failure report addresses
adkim	r	DKIM alignment (r = relaxed, s = strict)
aspf	s	SPF alignment (r = relaxed, s = strict)
rf	afrf	Failure report format

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:nbb@dmarcrua.tmes.trendmicro.eu
✓ 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: email

Found

Selectors: email
_domainkey: NOERROR

Selector	Key	Flags
email	RSA 2048 bits

Checks

✓ Keys found: email #7

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

DKIM keys are strong enough: email: RSA 2048 bits.
✓ No problematic flags #24

No keys in test mode, revoked, or limited to SHA-1.

DNSSEC

warn

Not signed

Found

DNSKEY records: No (0)
DS at parent: No

Checks

!

Not enabled

DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.

#8

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
10	nbb.in.tmes.trendmicro.eu	A 18.185.115.146 A 18.185.115.147 A 18.185.115.145	in.tmes.trendmicro.eu ✓ in.tmes.trendmicro.eu ✓ in.tmes.trendmicro.eu ✓

Checks

✓ 1 MX record #9

Found 1 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: nbb.in.tmes.trendmicro.eu

#11
!

Single MX host, no backup

Only one MX record found. For better email reliability, consider adding at least one backup MX server.

#12
✓ At most 5 MX records #13

Found 1 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 3 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 1 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
nbb.in.tmes.trendmicro.eu	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://bimi.nbb.com/bimi-logo.svg

Found

Record: v=BIMI1; l=https://bimi.nbb.com/bimi-logo.svg; a=https://bimi.nbb.com/bimi-chain.pem
Found at: default._bimi.notebooksbilliger.de
Logo: https://bimi.nbb.com/bimi-logo.svg
Certificate: https://bimi.nbb.com/bimi-chain.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://bimi.nbb.com/bimi-logo.svg; certificate: https://bimi.nbb.com/bimi-chain.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.