Mail domain report: mainau.de

SPF

pass

SPF record published

Found

Record: v=spf1 include:ppepoxnqms.powerspf.com -all
DNS lookups: 2 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 2 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.mainau.de)

Found

Record: v=DMARC1; p=reject; sp=reject; rua=mailto:r8gx5fcjnm@rua.powerdmarc.com; ruf=mailto:r8gx5fcjnm@ruf.powerdmarc.com; fo=0:1:d:s; t=n;
Found at: _dmarc.mainau.de
External report address: mailto:r8gx5fcjnm@rua.powerdmarc.com (authorized)
External report address: mailto:r8gx5fcjnm@ruf.powerdmarc.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
sp	reject	Subdomain policy
rua	mailto:r8gx5fcjnm@rua.powerdmarc.com	Aggregate report addresses
ruf	mailto:r8gx5fcjnm@ruf.powerdmarc.com	Failure report addresses
fo	0:1:d:s	Failure reporting options
t	n

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:r8gx5fcjnm@rua.powerdmarc.com
✓ 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: selector1

Found

Selectors: selector1
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 2048 bits

Checks

✓ Keys found: selector1 #7

DKIM keys found for this domain with selectors: selector1
✓ Strong keys #23

DKIM keys are strong enough: selector1: 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
0	mainau-de.mail.protection.outlook.com	A 52.101.170.1 A 52.101.168.0 A 52.101.170.2 A 52.101.170.0 AAAA 2a01:111:f403:ca27:: AAAA 2a01:111:f403:ca2d::2 AAAA 2a01:111:f403:ca2d::1 AAAA 2a01:111:f403:ca2d::	mail-fr4p281cu03101.inbound.protection.outlook.com ✓ mail-beup281cu00100.inbound.protection.outlook.com ✓ mail-fr6p281cu00202.inbound.protection.outlook.com ✓ mail-fr5p281cu00500.inbound.protection.outlook.com ✓ mail-beup281cu00100.inbound.protection.outlook.com ✓ mail-fr6p281cu00202.inbound.protection.outlook.com ✓ mail-fr4p281cu03101.inbound.protection.outlook.com ✓ mail-fr5p281cu00500.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

info

MTA-STS enforce · TLS-RPT · DANE on 0 of 1 MX hosts

Found

MTA-STS record: v=STSv1; id=20231214163348525000;
Policy URL: https://mta-sts.mainau.de/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: mainau-de.mail.protection.outlook.com
Max age: 86400 seconds
TLS-RPT record: v=TLSRPTv1;rua=mailto:r8gx5fcjnm@tls.powerdmarc.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
mainau-de.mail.protection.outlook.com	none	-

Checks

✓ Record published #32

MTA-STS record found with id 20231214163348525000.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 24h0m0s.
✓ All MX hosts covered #34

Every MX host matches an mx: line of the MTA-STS policy.
✓ Reports enabled #35

TLS reports are sent to: mailto:r8gx5fcjnm@tls.powerdmarc.com
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

Logo declined

Found

Record: v=BIMI1;l=;
Found at: default._bimi.mainau.de

Checks

i

Logo explicitly declined

The BIMI record has empty l= and a= tags, which says the domain publishes no logo.

#38