Mail domain report: maartenskliniek.nl

SPF

pass

SPF record published

Found

Record: v=spf1 ip4:199.255.192.0/22 ip4:199.127.232.0/22 ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:52.82.172.0/22 ip4:194.88.231.0/23 ip4:81.173.55.40 ip4:5.22.250.133 ip4:40.67.222.172 ip4:52.174.248.151 ip4:83.149.98.65 include:fdspfeuc.freshemail.io include:spf.protection.outlook.com include:_spf.zivver.com include:_spf.salesforce.com include:_spf.zorgmail.nl include:_spf.ezorg.nl ip4:198.2.128.0/24 ip4:198.2.132.0/22 ip4:198.2.136.0/23 ip4:198.2.145.0/24 ip4:198.2.186.0/23 ip4:205.201.131.128/25 ip4:205.201.134.128/25 ip4:205.201.136.0/23 ip4:205.201.139.0/24 ip4:198.2.177.0/24 ip4:198.2.178.0/23 ip4:198.2.180.0/24 ip4:5.39.169.42 ip4:205.201.128.0/20 ip4:148.105.8.0/21 ip4:80.246.195.160/28 ip4:157.97.213.30 ip4:62.204.93.131 ip4:207.244.98.227 ip4:83.149.98.72 ip4:81.17.56.1 ip4:83.149.98.73 ip4:13.88.226.191 ip4:40.115.66.46 ip4:13.94.232.90 ip4:191.238.213.99 ip4:51.13.102.144 ip4:178.162.177.161 ip4:3.74.56.125 ip4:4.185.96.20 ip4:20.162.206.62 ip4:172.172.139.18 ip4:4.223.229.111 ip4:94.124.94.113 ip4:89.200.203.150 ip4:185.103.19.215 ip6:2001:4cb8:638:ffff::fefc ip6:2001:4cb8:638:8::/64 include:i.%{ir}._d.mailserver.xpressionmanager.nl.my.spf.guru -all
DNS lookups: 10 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 10 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.maartenskliniek.nl)

Found

Record: v=DMARC1; p=reject; rua=mailto:f16fc1e178f6675@rep.dmarcanalyzer.com; ruf=mailto:dmarc@maartenskliniek.nl; pct=100; fo=1;
Found at: _dmarc.maartenskliniek.nl
External report address: mailto:f16fc1e178f6675@rep.dmarcanalyzer.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:f16fc1e178f6675@rep.dmarcanalyzer.com	Aggregate report addresses
ruf	mailto:dmarc@maartenskliniek.nl	Failure report addresses
fo	1	Failure reporting options

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:f16fc1e178f6675@rep.dmarcanalyzer.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

Found

Selectors: selector1
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 1024 bits

Checks

✓ Keys found: selector1 #7

DKIM keys found for this domain with selectors: selector1
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector1 (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

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 2371, 34505
Signatures valid until: 13 December 2026, 12:35 UTC

Checks

✓ Signed, DS published at parent #8

DNSSEC is enabled for this domain (DNSKEY and DS present), providing additional security for DNS lookups.
✓ Signatures valid until 2026-12-13 #21

DNSKEY signatures are valid until 2026-12-13T12:35:58Z.

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
10	maartenskliniek-nl.mail.protection.outlook.com	A 52.101.181.153 A 52.101.73.145 A 52.101.181.156 A 52.101.185.21 AAAA 2a01:111:f403:ca09::28 AAAA 2a01:111:f403:ca09::26 AAAA 2a01:111:f403:ca04::d AAAA 2a01:111:f403:ca04::10	mail-wa4pr04cu00101.inbound.protection.outlook.com ✓ mail-am6pr02cu00301.inbound.protection.outlook.com ✓ mail-wa4pr05cu00104.inbound.protection.outlook.com ✓ mail-zrxpr05cu00105.inbound.protection.outlook.com ✓ mail-am6pr02cu00300.inbound.protection.outlook.com ✓ mail-am8pr83cu00106.inbound.protection.outlook.com ✓ mail-db6pr03cu00105.inbound.protection.outlook.com ✓ mail-dbapr03cu00100.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
maartenskliniek-nl.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