Mail domain report: zaanstad.nl

SPF

pass

SPF record published

Found

Record: v=spf1 include:spf.shockmedia.email include:_spf.ezorg.nl include:spf.protection.outlook.com include:mailswitch.nl include:_spf.services.centric.eu a:malengo.exception.mx include:spf.gouwit.hosting include:spf_servers.yard.nl include:spf_cluster.yard.nl ip4:195.143.61.129/32 ip4:141.193.32.21 ip4:91.238.141.134/32 ip4:92.42.235.1/24 ip4:46.31.48.0/21 ip4:83.96.238.52/32 ip4:91.238.141.2/32 ip4:91.238.141.11/32 ip4:80.79.108.80/32 ip4:195.137.169.214/32 ip4:195.137.169.203/32 ip4:87.249.113.154/32 ip4:89.250.189.21/32 ip4:62.50.13.64/28 ip4:194.158.15.0/25 ip6:2a00:1fb8:a13:1::25 ip6:2a07:3500:10a0:521::5bee:8d02/128 ip6:2a07:3500:10a0:521::5bee:8d0b/128 ip6:2a02:23e8::/32 ip6:2001:4cb8:59c:1::25/128 ip4:4.223.229.111/32 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 ip4:87.253.151.0/24 ip4:195.137.214.215 ip4:195.137.214.216 ip4:195.137.214.217 ip4:141.193.32.0/23 ip4:143.55.224.0/21 ip4:143.55.232.0/22 ip4:143.55.236.0/22 ip4:159.112.240.0/20 ip4:159.135.132.128/25 ip4:159.135.140.80/29 ip4:159.135.224.0/20 ip4:161.38.192.0/20 ip4:161.38.204.0/22 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 ip4:198.244.48.0/20 ip4:198.244.60.0/22 ip4:204.220.160.0/20 ip4:204.220.168.0/21 ip4:204.220.176.0/20 ip4:204.220.90.0/23 ip4:204.220.92.0/22 ip4:69.72.32.0/20 ip4:87.253.232.0/21 -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

warn

p=quarantine (_dmarc.zaanstad.nl)

Found

Record: v=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc@zaanstad.nl; sp=none
Found at: _dmarc.zaanstad.nl

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
sp	none	Subdomain policy
pct	100	Percentage of mail the policy applies to
rua	mailto:dmarc@zaanstad.nl	Aggregate report addresses

Checks

!

Policy: quarantine

DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

#4
✓ 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:dmarc@zaanstad.nl
!

Subdomains unprotected (sp=none)

DMARC subdomain policy is sp=none, so spoofed mail from subdomains is not blocked. Consider sp=quarantine or sp=reject.

#20
✓ Report addresses in own domain #29

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: selector1, selector2, s1, s2

Found

Selectors: selector1, selector2, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 2048 bits
selector2	RSA 2048 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: selector1, selector2, s1, s2 #7

DKIM keys found for this domain with selectors: selector1, selector2, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: s2 (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 (1)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 32634
Signatures valid until: 5 November 2026, 00:00 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 2026-11-05 #21

DNSKEY signatures are valid until 2026-11-05T00:00:00Z.

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
10	zaanstad-nl.w-v1.mx.microsoft	A 52.101.103.162 A 52.101.181.156 A 52.101.103.36 A 52.101.91.21 AAAA 2a01:111:f403:c967::a AAAA 2a01:111:f403:c967::c AAAA 2a01:111:f403:ca48::10 AAAA 2a01:111:f403:ca09::a	mail-miypr03cu00202.inbound.protection.outlook.com ✓ mail-wa4pr05cu00104.inbound.protection.outlook.com ✓ mail-miypr05cu00104.inbound.protection.outlook.com ✓ mail-matpr05cu00105.inbound.protection.outlook.com ✓ mail-cpjpr05cu00102.inbound.protection.outlook.com ✓ mail-cpjpr05cu00204.inbound.protection.outlook.com ✓ mail-miypr05cu00100.inbound.protection.outlook.com ✓ mail-am7pr02cu00202.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 1 of 1 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
zaanstad-nl.w-v1.mx.microsoft	3 1 1 cfd68bde4129c00a… 2 0 1 ea7a25255d111fc3… 3 1 1 54883cc5f1849331… 2 0 1 c1ad7778796d20bc… 3 1 1 803f7447cc75b208…	Yes

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
!

Not configured

MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".

#35
✓ DANE on all MX hosts #36

All 1 MX host publish DNSSEC-validated TLSA records.

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