Mail domain report: centerparcs.de

SPF

pass

SPF record published

Found

Record: v=spf1 -all
DNS lookups: 0 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 0 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.centerparcs.de)

Found

Record: v=DMARC1; p=reject; rua=mailto:corporateoffice.office365-dmarc@groupepvcp.com
Found at: _dmarc.centerparcs.de
External report address: mailto:corporateoffice.office365-dmarc@groupepvcp.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:corporateoffice.office365-dmarc@groupepvcp.com	Aggregate report addresses

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:corporateoffice.office365-dmarc@groupepvcp.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

warn

Selectors: selector1, selector2

Found

Selectors: selector1, selector2
_domainkey: NXDOMAIN

Selector	Key	Flags
selector1	RSA 1024 bits
selector2	RSA 1024 bits

Checks

✓ Keys found: selector1, selector2 #7

DKIM keys found for this domain with selectors: selector1, selector2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits), selector2 (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

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

5 mail servers

Found

Priority	Host	Records	Reverse DNS
5	centerparcs-de.mail.protection.outlook.com	A 52.101.103.39 A 52.101.103.162 A 52.101.185.114 A 52.101.68.25 AAAA 2a01:111:f403:ca09::a AAAA 2a01:111:f403:ca21::e AAAA 2a01:111:f403:ca21::8 AAAA 2a01:111:f403:ca21::a	mail-miypr05cu00207.inbound.protection.outlook.com ✓ mail-miypr03cu00202.inbound.protection.outlook.com ✓ mail-zrxpr04cu00102.inbound.protection.outlook.com ✓ mail-db8pr02cu00101.inbound.protection.outlook.com ✓ mail-am7pr02cu00202.inbound.protection.outlook.com ✓ mail-matpr04cu00306.inbound.protection.outlook.com ✓ mail-matpr04cu00100.inbound.protection.outlook.com ✓ mail-maspr04cu00102.inbound.protection.outlook.com ✓
10	centerparcs-de.mail.eo.outlook.com	A 52.101.209.31 A 52.101.91.153 A 52.101.68.25 A 52.101.185.21 AAAA 2a01:111:f403:ca09::24 AAAA 2a01:111:f403:ca04::c AAAA 2a01:111:f403:ca04::10 AAAA 2a01:111:f403:ca3c::a	mail-cpjpr05cu00207.inbound.protection.outlook.com ✓ mail-matpr04cu00101.inbound.protection.outlook.com ✓ mail-db8pr02cu00101.inbound.protection.outlook.com ✓ mail-zrxpr05cu00105.inbound.protection.outlook.com ✓ mail-am6pr02cu00204.inbound.protection.outlook.com ✓ mail-db9pr02cu00204.inbound.protection.outlook.com ✓ mail-dbapr03cu00100.inbound.protection.outlook.com ✓ mail-zrxpr07cu00102.inbound.protection.outlook.com ✓
20	mail.centerparcs.nl	A 193.172.165.15	static.kpn.net (does not resolve back)
30	mx1.networking4all.com	(does not resolve)
40	mx2.networking4all.net	(does not resolve)

Checks

✓ 5 MX records #9

Found 5 MX records for this domain.
!

Hosts without IP addresses

The following MX hosts could not be resolved to IP addresses: mx1.networking4all.com, mx2.networking4all.net

#10
!

Hosts without IPv6

The following MX hosts could not be resolved to IPv6 addresses: mail.centerparcs.nl, mx1.networking4all.com, mx2.networking4all.net

#11
✓ Redundant MX hosts #12

Found 5 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 5 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 does not match

The PTR name of these addresses does not resolve back to the same address: 193.172.165.15 -> static.kpn.net.

#30

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 5 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
centerparcs-de.mail.protection.outlook.com	none	-
centerparcs-de.mail.eo.outlook.com	none	-
mail.centerparcs.nl	none	-
mx1.networking4all.com	none	-
mx2.networking4all.net	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