Mail domain report: nw.de

SPF

fail

SPF record published

Found

Record: v=spf1 mx ip4:212.8.208.0/24 ip4:212.8.209.192/29 ip4:212.8.197.4/32 ip4:212.8.197.5/32 ip4:212.8.197.13/32 ip4:212.8.197.105/32 ip4:212.8.197.106/32 ip4:212.8.197.107/32 ip4:212.8.197.109/32 ip4:188.94.250.251/32 ip4:188.94.250.245/32 ip4:185.227.112.237/32 ip4:185.15.192.203/32 ip4:195.140.184.0/22 ip4:91.192.40.0/22 ip4:199.244.72.0/24 ip4:199.244.74.22/32 ip4:213.157.3.185/32 ip4:185.39.220.181/32 ip4:199.187.173.251/32 include:spf.protection.outlook.com include:amazonses.com include:thinkowl.nw.de include:spf.fidion.de include:_spfi.evolver.de include:spf.teuto.net include:spf.gutenberg-rz.de -all
DNS lookups: 11 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✗

11 DNS lookups, over the limit of 10

SPF record needs 11 DNS lookups (including nested includes), more than the limit of 10. Receivers will return a permerror; reduce includes or flatten the record.

#2
✓ 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

fail

p=none (_dmarc.nw.de)

Found

Record: v=DMARC1; p=none; rua=mailto:rua@dmarc.brevo.com
Found at: _dmarc.nw.de
External report address: mailto:rua@dmarc.brevo.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:rua@dmarc.brevo.com	Aggregate report addresses

Checks

✗

Policy: none (monitoring only)

DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.

#4
✓ Record published #5

DMARC record exists for this domain.
✓ Valid syntax #17

DMARC record syntax is valid.
✓ Aggregate reports enabled #19

Aggregate reports are sent to: mailto:rua@dmarc.brevo.com
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

pass

Selectors: default

Found

Selectors: default
_domainkey: NOERROR

Selector	Key	Flags
default	RSA 2048 bits

Checks

✓ Keys found: default #7

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

DKIM keys are strong enough: default: 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	nw-de.mail.protection.outlook.com	A 52.101.91.162 A 52.101.103.140 A 52.101.91.21 A 52.101.91.153 AAAA 2a01:111:f403:ca3c::8 AAAA 2a01:111:f403:ca48::10 AAAA 2a01:111:f403:ca38::a AAAA 2a01:111:f403:ca21::c	mail-matpr04cu00302.inbound.protection.outlook.com ✓ mail-miypr02cu00204.inbound.protection.outlook.com ✓ mail-matpr05cu00105.inbound.protection.outlook.com ✓ mail-matpr04cu00101.inbound.protection.outlook.com ✓ mail-zrxpr05cu00100.inbound.protection.outlook.com ✓ mail-miypr05cu00100.inbound.protection.outlook.com ✓ mail-wa4pr05cu00102.inbound.protection.outlook.com ✓ mail-matpr04cu00204.inbound.protection.outlook.com ✓

Checks

✓ 1 MX record #9

Found 1 MX records for this domain.
✓ All hosts resolve #10

All MX records resolve to valid IP addresses.
✓ All hosts have IPv6 #11

All MX records resolve to IPv6 addresses.
!

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 8 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
nw-de.mail.protection.outlook.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

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