tennis.nl

Checked 22 October 2026, 16:30 UTC · via 8.8.8.8
✗Problems found
21 passed 4 warnings 2 failed 3 info

SPF

fail

SPF record published

Found

Record
v=spf1 a ip4:89.30.159.166 ip4:149.210.182.28 include:spf.protection.outlook.com include:mailplus.nl include:afasonline.nl include:sendgrid.net ip4:95.170.73.6 ip4:81.169.239.116 ip4:172.105.72.210 include:spf.mandrillapp.com include: spf.byte.nl ~all
DNS lookups
11 of 10
Void lookups
0 of 2
Problem
include without a domain

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✗
    11 DNS lookups, over the limit of 10
    SPF record needs 11 DNS lookups (including nested includes), more than the limit of 10. Receivers will return a permerror; reduce includes or flatten the record. Problems found: include without a domain.
    #2
  • ✓ 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.
  • ✗
    Syntax errors
    Receivers reject the whole SPF record (permerror) because of: "include:": include needs a value; unknown mechanism "spf.byte.nl".
    #25
  • ✓ 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.tennis.nl)

Found

Record
v=DMARC1; p=reject; rua=mailto:ge3ijhib@ag.eu.dmarcadvisor.com; ruf=mailto:ge3ijhib@fr.eu.dmarcadvisor.com; fo=1
Found at
_dmarc.tennis.nl
External report address
mailto:ge3ijhib@ag.eu.dmarcadvisor.com (authorized)
External report address
mailto:ge3ijhib@fr.eu.dmarcadvisor.com (authorized)
TagValueMeaning
vDMARC1Version
prejectPolicy
ruamailto:ge3ijhib@ag.eu.dmarcadvisor.comAggregate report addresses
rufmailto:ge3ijhib@fr.eu.dmarcadvisor.comFailure report addresses
fo1Failure 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:ge3ijhib@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

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NOERROR

Checks

  • !
    No key under common selectors
    The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.
    #7

DNSSEC

warn

Not signed

Found

DNSKEY records
No (0)
DS at parent
No

Checks

  • !
    Not enabled
    DNSSEC is not enabled for this domain. Consider enabling DNSSEC to protect against DNS spoofing attacks.
    #8

MX

warn

2 mail servers

Found

PriorityHostRecordsReverse DNS
10mx.mailprotect.beA 178.208.39.143 A 178.208.39.140 A 178.208.39.141 A 178.208.39.142mx.mailprotect.be ✓ mx.mailprotect.be ✓ mx.mailprotect.be ✓ mx.mailprotect.be ✓
50mx.backup.mailprotect.beA 178.208.39.141 A 178.208.39.142 A 178.208.39.143 A 178.208.39.140mx.mailprotect.be ✓ mx.mailprotect.be ✓ mx.mailprotect.be ✓ mx.mailprotect.be ✓

Checks

  • ✓ 2 MX records #9
    Found 2 MX records for this domain.
  • ✓ All hosts resolve #10
    All MX records resolve to valid IP addresses.
  • !
    Hosts without IPv6
    The following MX hosts could not be resolved to IPv6 addresses: mx.mailprotect.be, mx.backup.mailprotect.be
    #11
  • ✓ 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 8 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mx.mailprotect.benone-
mx.backup.mailprotect.benone-

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