wikipedia.nl

Checked 22 October 2026, 17:12 UTC · via 8.8.8.8
✗Problems found
20 passed 2 warnings 2 failed 1 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:_spf4.pcextreme.nl include:_spf6.pcextreme.nl ~all
DNS lookups
3 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 3 of 10 DNS lookups #2
    SPF record needs 3 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

fail

No DMARC record found

Checks

  • ✗
    No DMARC record
    No DMARC record was found for this domain. DMARC is essential for preventing email spoofing. Add a DMARC record with p=reject or at least p=quarantine.
    #5

DKIM

fail

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NXDOMAIN

Checks

  • ✗
    No DKIM keys published
    _domainkey.wikipedia.nl does not exist (NXDOMAIN), so no DKIM keys are published. DKIM helps prevent email spoofing. Configure DKIM with your email service provider.
    #7

DNSSEC

pass

Signed, DS published at parent

Found

DNSKEY records
Yes (3)
DS at parent
Yes
Algorithms
RSASHA256 (8)
Key tags
28024, 7097, 3711
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

pass

2 mail servers

Found

PriorityHostRecordsReverse DNS
10primary.mail.pcextreme.nlA 185.66.250.201 A 185.87.184.60 A 185.87.185.193 A 185.66.250.200 A 185.87.186.222 A 185.107.224.99 AAAA 2a00:f10:121:b00:43f:e2ff:fe00:1cfb AAAA 2a00:f10:400:2:44a:acff:fe00:33f AAAA 2a00:f10:121:a00:4f8:84ff:fe00:1846 AAAA 2a00:f10:121:a00:470:4ff:fe00:1845 AAAA 2a00:f10:400:2:4df:4aff:fe00:1c4 AAAA 2a00:f10:400:2:488:56ff:fe00:74fse02.route25.eu ✓ se04.route25.eu ✓ se06.route25.eu ✓ se01.route25.eu ✓ se05.route25.eu ✓ se03.route25.eu ✓ se05.route25.eu ✓ se06.route25.eu ✓ se02.route25.eu ✓ se01.route25.eu ✓ se04.route25.eu ✓ se03.route25.eu ✓
20fallback.mail.pcextreme.nlA 185.107.224.99 A 185.87.186.222 A 185.87.185.193 A 185.87.184.60 A 185.66.250.201 A 185.66.250.200 AAAA 2a00:f10:121:a00:4f8:84ff:fe00:1846 AAAA 2a00:f10:400:2:4df:4aff:fe00:1c4 AAAA 2a00:f10:121:b00:43f:e2ff:fe00:1cfb AAAA 2a00:f10:400:2:488:56ff:fe00:74f AAAA 2a00:f10:121:a00:470:4ff:fe00:1845 AAAA 2a00:f10:400:2:44a:acff:fe00:33fse03.route25.eu ✓ se05.route25.eu ✓ se06.route25.eu ✓ se04.route25.eu ✓ se02.route25.eu ✓ se01.route25.eu ✓ se02.route25.eu ✓ se04.route25.eu ✓ se05.route25.eu ✓ se03.route25.eu ✓ se01.route25.eu ✓ se06.route25.eu ✓

Checks

  • ✓ 2 MX records #9
    Found 2 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.
  • ✓ Redundant MX hosts #12
    Found 2 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 2 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 24 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 2 of 2 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
primary.mail.pcextreme.nl3 1 1 740c71205e6671a8…Yes
fallback.mail.pcextreme.nl3 1 1 740c71205e6671a8…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 2 MX hosts 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