skylinepark.de

Checked 22 October 2026, 00:10 UTC · via 8.8.8.8
✗Problems found
21 passed 5 warnings 2 failed 2 info

SPF

info

SPF record published

Found

Record
v=spf1 redirect=skylinepark.de.spf.hornetdmarc.com
DNS lookups
4 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 4 of 10 DNS lookups #2
    SPF record needs 4 DNS lookups (limit is 10).
  • i
    Delegated via redirect
    SPF record has no 'all' mechanism but redirects to skylinepark.de.spf.hornetdmarc.com, whose policy applies.
    #3
  • ✓ 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.skylinepark.de)

Found

Record
v=DMARC1; p=none; fo=0:1:d:s; rua=mailto:a.k879lyn3@reports.hornetdmarc.com; ruf=mailto:f.k879lyn3@reports.hornetdmarc.com
Found at
_dmarc.skylinepark.de
External report address
mailto:a.k879lyn3@reports.hornetdmarc.com (authorized)
External report address
mailto:f.k879lyn3@reports.hornetdmarc.com (authorized)
TagValueMeaning
vDMARC1Version
pnonePolicy
ruamailto:a.k879lyn3@reports.hornetdmarc.comAggregate report addresses
rufmailto:f.k879lyn3@reports.hornetdmarc.comFailure report addresses
fo0:1:d:sFailure reporting options

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:a.k879lyn3@reports.hornetdmarc.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

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

4 mail servers

Found

PriorityHostRecordsReverse DNS
10mx01.hornetsecurity.comA 94.100.132.8mx01.hornetsecurity.com ✓
20mx02.hornetsecurity.comA 94.100.136.8mx02.hornetsecurity.com ✓
30mx03.hornetsecurity.comA 94.100.134.8mx03.hornetsecurity.com ✓
40mx04.hornetsecurity.comA 94.100.136.7mx04.hornetsecurity.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.
  • !
    Hosts without IPv6
    The following MX hosts could not be resolved to IPv6 addresses: mx01.hornetsecurity.com, mx02.hornetsecurity.com, mx03.hornetsecurity.com, mx04.hornetsecurity.com
    #11
  • ✓ 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 4 MX addresss have a PTR record that resolves back to them.

TLS

warn

MTA-STS none · TLS-RPT · DANE on 0 of 4 MX hosts

Found

MTA-STS record
v=STSv1; id=1784746218
Policy URL
https://mta-sts.skylinepark.de/.well-known/mta-sts.txt
Mode
none
Allowed MX
mx01.hornetsecurity.com, mx02.hornetsecurity.com, mx03.hornetsecurity.com, mx04.hornetsecurity.com
Max age
604800 seconds
TLS-RPT record
v=TLSRPTv1; rua=mailto:reports@reports.hornetdmarc.com

DANE (TLSA records)

MX hostTLSADNSSEC
mx01.hornetsecurity.comnone-
mx02.hornetsecurity.comnone-
mx03.hornetsecurity.comnone-
mx04.hornetsecurity.comnone-

Checks

  • ✓ Record published #32
    MTA-STS record found with id 1784746218.
  • !
    Policy disabled (mode: none)
    The MTA-STS policy is switched off with mode: none.
    #33
  • ✓ Reports enabled #35
    TLS reports are sent to: mailto:reports@reports.hornetdmarc.com
  • 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

fail

https://portal.hornetdmarc.com/storage/domains/bimi/v6uszfu7l5vdCjSmxfQAQ2YrrfHdPrFOUwNEw4Vg.svg

Found

Record
v=BIMI1; l=https://portal.hornetdmarc.com/storage/domains/bimi/v6uszfu7l5vdCjSmxfQAQ2YrrfHdPrFOUwNEw4Vg.svg
Found at
default._bimi.skylinepark.de
Logo
https://portal.hornetdmarc.com/storage/domains/bimi/v6uszfu7l5vdCjSmxfQAQ2YrrfHdPrFOUwNEw4Vg.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 not strict enough for BIMI
    Mail clients will not show the logo. BIMI requires DMARC p=quarantine or p=reject (now p=none), a subdomain policy other than sp=none.
    #39