keessmit.nl

Checked 22 October 2026, 14:02 UTC · via 8.8.8.8
✗Problems found
22 passed 4 warnings 2 failed 1 info

SPF

fail

SPF record published

Found

Record
v=spf1 a mx include:mail.zendesk.com include:spf.protection.outlook.com ip4:84.241.129.204 ip4:84.241.129.205 ip4:84.241.129.206 ip4:5.39.185.0/24 ip4:5.39.185.32/29 ip4:5.255.65.198 ip4:5.255.65.215 ip6:2a01:4f8:c0:23ce::2 include:_spf1.keessmit.nl ~all
DNS lookups
11 of 10
Void lookups
0 of 2

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.
    #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.
  • ✓ 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

p=none (_dmarc.keessmit.nl)

Found

Record
v=DMARC1;p=none;pct=100;rua=mailto:dmarc@smtpeter.com
Found at
_dmarc.keessmit.nl
External report address
mailto:dmarc@smtpeter.com (authorized)
TagValueMeaning
vDMARC1Version
pnonePolicy
pct100Percentage of mail the policy applies to
ruamailto:dmarc@smtpeter.comAggregate report addresses

Checks

  • ✗
    Policy: none (monitoring only)
    DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • ✓ Record published #5
    DMARC record exists for this domain.
  • ✓ Valid syntax #17
    DMARC record syntax is valid.
  • ✓ Aggregate reports enabled #19
    Aggregate reports are sent to: mailto:dmarc@smtpeter.com
  • ✓ 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

Signed, DS published at parent

Found

DNSKEY records
Yes (3)
DS at parent
Yes
Algorithms
ECDSAP256SHA256 (13)
Key tags
63028, 17542, 34775
Signatures valid until
22 October 2026, 18:00 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 expire in 4h0m0s
    DNSKEY signatures expire at 2026-10-22T18:00:00Z (in 4h0m0s). Check that re-signing works.
    #21

MX

pass

4 mail servers

Found

PriorityHostRecordsReverse DNS
10filter10.antispamcloud.comA 149.13.75.27 AAAA 2001:978:2:2c::137:100fe1-r3-in.fra02.l.antispamcloud.com ✓ fe2-r3-in.ams14.l.antispamcloud.com ✓
20filter20.antispamcloud.comA 149.13.75.27 AAAA 2001:978:2:7::162:100fe1-r3-in.fra02.l.antispamcloud.com ✓ fe1-r3-in.fra02.l.antispamcloud.com ✓
30filter30.antispamcloud.comA 154.59.104.23 AAAA 2001:978:2:2c::137:100fe2-r3-in.ams14.l.antispamcloud.com ✓ fe2-r3-in.ams14.l.antispamcloud.com ✓
40filter40.antispamcloud.comA 154.59.193.124 AAAA 2001:978:2:6::f:124fe3-r3-in.du01.l.antispamcloud.com ✓ fe3-r3-in.du01.l.antispamcloud.com ✓

Checks

  • ✓ 4 MX records #9
    Found 4 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 4 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 4 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 4 of 4 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
filter10.antispamcloud.com3 1 1 a10ec56f992e0e0c…Yes
filter20.antispamcloud.com3 1 1 a10ec56f992e0e0c…Yes
filter30.antispamcloud.com3 1 1 a10ec56f992e0e0c…Yes
filter40.antispamcloud.com3 1 1 a10ec56f992e0e0c…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 4 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