xel.nl

Checked 21 October 2026, 21:27 UTC · via 8.8.8.8
!Passed with warnings
29 passed 5 warnings 0 failed

SPF

pass

SPF record published

Found

Record
v=spf1 include:_spf.mlsend.com include:spf.xel.nl include:servers.mcsv.net include:registrarmail.net include:mail.registrar.eu -all
DNS lookups
6 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 6 of 10 DNS lookups #2
    SPF record needs 6 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

warn

p=quarantine (_dmarc.xel.nl)

Found

Record
v=DMARC1; p=quarantine; rua=mailto:dmarc@xel.nl; ruf=mailto:dmarc@xel.nl
Found at
_dmarc.xel.nl
TagValueMeaning
vDMARC1Version
pquarantinePolicy
ruamailto:dmarc@xel.nlAggregate report addresses
rufmailto:dmarc@xel.nlFailure report addresses

Checks

  • !
    Policy: quarantine
    DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.
    #4
  • ✓ 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:dmarc@xel.nl
  • ✓ Subdomain policy: quarantine #20
    Subdomains are covered by policy 'quarantine'.
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

DKIM

warn

Selectors: default

Found

Selectors
default
_domainkey
NOERROR
SelectorKeyFlags
defaultRSA 1024 bits

Checks

  • ✓ Keys found: default #7
    DKIM keys found for this domain with selectors: default
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: default (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 (1)
DS at parent
Yes
Algorithms
ECDSAP256SHA256 (13)
Key tags
4480
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

pass

4 mail servers

Found

PriorityHostRecordsReverse DNS
10mx1.xel.nlA 213.154.226.4 AAAA 2001:7b8:620:1::d59a:e204mx1.xel.nl ✓ mx1.xel.nl ✓
10mx11.xel.nlA 213.154.226.25 AAAA 2001:7b8:620:1::d59a:e219mx11.xel.nl ✓ mx11.xel.nl ✓
10mx2.xel.nlA 213.154.226.5 AAAA 2001:7b8:620:1::d59a:e205mx2.xel.nl ✓ mx2.xel.nl ✓
15mx3.xel.nlA 213.154.226.3 AAAA 2001:7b8:620:1::d59a:e203mx3.xel.nl ✓ mx3.xel.nl ✓

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
mx1.xel.nl3 1 1 7bb2835d1567139c…Yes
mx11.xel.nl3 1 1 7bb2835d1567139c…Yes
mx2.xel.nl3 1 1 7bb2835d1567139c…Yes
mx3.xel.nl3 1 1 7bb2835d1567139c…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

warn

https://assets.xel.nl/bimi/xel-icon.svg

Found

Record
v=BIMI1; l=https://assets.xel.nl/bimi/xel-icon.svg
Found at
default._bimi.xel.nl
Logo
https://assets.xel.nl/bimi/xel-icon.svg

Checks

  • !
    No certificate (a=)
    The logo is published without a Verified Mark Certificate. Gmail and Apple Mail only show BIMI logos with a VMC or CMC; Yahoo shows it without one.
    #38
  • ✓ DMARC meets BIMI requirements #39
    DMARC is enforced on all mail, as BIMI requires.