verstappen.nl

Checked 22 October 2026, 17:01 UTC · via 8.8.8.8
!Passed with warnings
20 passed 2 warnings 0 failed 5 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:spf.protection.outlook.com -all
DNS lookups
1 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 1 of 10 DNS lookups #2
    SPF record needs 1 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

info

DNS query for _dmarc.verstappen.nl returned SERVFAIL

Checks

  • i
    Could not be checked
    The DMARC lookup failed, so this could not be checked: DNS query for _dmarc.verstappen.nl returned SERVFAIL
    #5

DKIM

warn

Selectors: k1

Found

Selectors
k1
_domainkey
SERVFAIL
SelectorKeyFlags
k1RSA 1024 bits

Checks

  • ✓ Keys found: k1 #7
    DKIM keys found for this domain with selectors: k1
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: k1 (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 (3)
DS at parent
Yes
Algorithms
RSASHA256 (8)
Key tags
28921, 63849, 46539
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

PriorityHostRecordsReverse DNS
0verstappen-nl.mail.protection.outlook.comA 52.101.103.162 A 52.101.91.153 A 52.101.103.140 A 52.101.103.36 AAAA 2a01:111:f403:ca38::8 AAAA 2a01:111:f403:c967::8 AAAA 2a01:111:f403:ca21::a AAAA 2a01:111:f403:ca09::26mail-miypr03cu00202.inbound.protection.outlook.com ✓ mail-matpr04cu00101.inbound.protection.outlook.com ✓ mail-miypr02cu00204.inbound.protection.outlook.com ✓ mail-miypr05cu00104.inbound.protection.outlook.com ✓ mail-wa4pr04cu00100.inbound.protection.outlook.com ✓ mail-cpjpr04cu00100.inbound.protection.outlook.com ✓ mail-maspr04cu00102.inbound.protection.outlook.com ✓ mail-am8pr83cu00106.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

no MTA-STS · no TLS-RPT · DANE on 0 of 1 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
verstappen-nl.mail.protection.outlook.comnone-
Lookup error: DNS query for _mta-sts.verstappen.nl returned SERVFAIL

Checks

  • i
    Could not be checked
    The MTA-STS lookup failed, so this could not be checked: DNS query for _mta-sts.verstappen.nl returned SERVFAIL
    #32
  • i
    Could not be checked
    The TLS-RPT lookup failed, so this could not be checked: DNS query for _smtp._tls.verstappen.nl returned SERVFAIL
    #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

DNS query for default._bimi.verstappen.nl returned SERVFAIL

Checks

  • i
    Could not be checked
    The BIMI lookup failed, so this could not be checked: DNS query for default._bimi.verstappen.nl returned SERVFAIL
    #38