Mail domain report: fzi.de

SPF

pass

SPF record published

Found

Record: v=spf1 ip4:141.21.17.46 ip4:141.21.17.47 ip6:2001:67c:2acc:8:141:21:17:46 ip6:2001:67c:2acc:8:141:21:17:47 ip4:141.21.8.137 ip6:2001:67c:2acc:5:141:21:8:137 ip4:141.21.8.250 ip4:141.21.8.251 ip4:141.21.8.252 include:spf.protection.outlook.com -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

fail

p=none (_dmarc.fzi.de)

Found

Record: v=DMARC1;p=none;rua=mailto:dmarc-rua-fzi@fzi.de;ruf=mailto:dmarc-ruf-fzi@fzi.de
Found at: _dmarc.fzi.de

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:dmarc-rua-fzi@fzi.de	Aggregate report addresses
ruf	mailto:dmarc-ruf-fzi@fzi.de	Failure 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:dmarc-rua-fzi@fzi.de
✓ Report addresses in own domain #29

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: default

Found

Selectors: default
_domainkey: NOERROR

Selector	Key	Flags
default	RSA public key could not be parsed	h=sha256

Checks

✓ Keys found: default #7

DKIM keys found for this domain with selectors: default
!

Unreadable DKIM key

These keys could not be parsed, so signatures made with them will fail: default (RSA public key could not be parsed).

#23
✓ 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

pass

2 mail servers

Found

Priority	Host	Records	Reverse DNS
10	fzi-mail-in-01.fzi.de	A 141.21.17.41 AAAA 2001:67c:2acc:8:141:21:17:41	fzi-mail-in-01.fzi.de ✓ fzi-mail-in-01.fzi.de ✓
50	fzi-mail-in-02.fzi.de	A 141.21.17.42 AAAA 2001:67c:2acc:8:141:21:17:42	fzi-mail-in-02.fzi.de ✓ fzi-mail-in-02.fzi.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.
✓ All hosts have IPv6 #11

All MX records resolve to IPv6 addresses.
✓ 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 4 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
fzi-mail-in-01.fzi.de	none	-
fzi-mail-in-02.fzi.de	none	-

Lookup error: DNS query for _smtp._tls.fzi.de returned SERVFAIL

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

Could not be checked

The TLS-RPT lookup failed, so this could not be checked: DNS query for _smtp._tls.fzi.de returned SERVFAIL

#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