zilverenkruis.nl

Checked 21 October 2026, 21:27 UTC · via 8.8.8.8
!Passed with warnings
29 passed 3 warnings 0 failed 2 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:spf.mailrelay.achmea.nl ip4:194.88.231.19 ip4:87.251.53.86 ip4:46.31.48.0/21 ip4:213.214.120.41 ip4:213.214.110.3 include:spf.protection.outlook.com ip4:147.181.6.194 -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.zilverenkruis.nl)

Found

Record
v=DMARC1;p=reject;np=reject;rua=mailto:m6panlfh@ag.eu.dmarcadvisor.com
Found at
_dmarc.zilverenkruis.nl
External report address
mailto:m6panlfh@ag.eu.dmarcadvisor.com (authorized)
TagValueMeaning
vDMARC1Version
prejectPolicy
ruamailto:m6panlfh@ag.eu.dmarcadvisor.comAggregate report addresses
npreject

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:m6panlfh@ag.eu.dmarcadvisor.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, s1, s2

Found

Selectors
selector1, selector2, s1, s2
_domainkey
NOERROR
SelectorKeyFlags
selector1RSA 2048 bits
selector2RSA 2048 bits
s1RSA 2048 bits
s2RSA 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 (2)
DS at parent
Yes
Algorithms
ECDSAP256SHA256 (13)
Key tags
16445, 33174
Signatures valid until
29 October 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 2026-10-29 #21
    DNSKEY signatures are valid until 2026-10-29T00:00:00Z.

MX

warn

1 mail server

Found

PriorityHostRecordsReverse DNS
0zilverenkruis-nl.l-v1.mx.microsoftA 52.101.209.31 A 52.101.103.39 A 52.101.91.156 A 52.101.185.114 AAAA 2a01:111:f403:ca04::f AAAA 2a01:111:f403:ca48::8 AAAA 2a01:111:f403:ca04::e AAAA 2a01:111:f403:ca09::22mail-cpjpr05cu00207.inbound.protection.outlook.com ✓ mail-miypr05cu00207.inbound.protection.outlook.com ✓ mail-maspr04cu00104.inbound.protection.outlook.com ✓ mail-zrxpr04cu00102.inbound.protection.outlook.com ✓ mail-db7pr03cu00507.inbound.protection.outlook.com ✓ mail-miypr02cu00100.inbound.protection.outlook.com ✓ mail-db8pr02cu00106.inbound.protection.outlook.com ✓ mail-am7pr02cu00302.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 hostTLSADNSSEC
zilverenkruis-nl.l-v1.mx.microsoftnone-

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

pass

https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.svg

Found

Record
v=BIMI1; l=https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.svg; a=https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.pem;
Found at
default._bimi.zilverenkruis.nl
Logo
https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.svg
Certificate
https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.pem

Checks

  • ✓ Logo and certificate published #38
    BIMI logo: https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.svg; certificate: https://bimi.eu.dmarcmanager.app/eu-m6panlfh/default/zilverenkruis.pem
  • ✓ DMARC meets BIMI requirements #39
    DMARC is enforced on all mail, as BIMI requires.