kfn.de

Checked 21 October 2026, 23:02 UTC · via 8.8.8.8
!Passed with warnings
30 passed 3 warnings 0 failed 2 info

SPF

info

SPF record published

Found

Record
v=spf1 redirect=kfn.de.spf.sophosdmarc.net
DNS lookups
7 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 7 of 10 DNS lookups #2
    SPF record needs 7 DNS lookups (limit is 10).
  • i
    Delegated via redirect
    SPF record has no 'all' mechanism but redirects to kfn.de.spf.sophosdmarc.net, 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

pass

p=reject (_dmarc.kfn.de)

Found

Record
v=DMARC1; p=reject; fo=0:1:d:s; rua=mailto:a.6uynx9m3@reports.sophosdmarc.net; ruf=mailto:f.6uynx9m3@reports.sophosdmarc.net
Found at
_dmarc.kfn.de
External report address
mailto:a.6uynx9m3@reports.sophosdmarc.net (authorized)
External report address
mailto:f.6uynx9m3@reports.sophosdmarc.net (authorized)
TagValueMeaning
vDMARC1Version
prejectPolicy
ruamailto:a.6uynx9m3@reports.sophosdmarc.netAggregate report addresses
rufmailto:f.6uynx9m3@reports.sophosdmarc.netFailure report addresses
fo0:1:d:sFailure 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:a.6uynx9m3@reports.sophosdmarc.net
  • ✓ 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

pass

Selectors: selector1

Found

Selectors
selector1
_domainkey
NOERROR
SelectorKeyFlags
selector1RSA 2048 bits

Checks

  • ✓ Keys found: selector1 #7
    DKIM keys found for this domain with selectors: selector1
  • ✓ Strong keys #23
    DKIM keys are strong enough: selector1: RSA 2048 bits.
  • ✓ No problematic flags #24
    No keys in test mode, revoked, or limited to SHA-1.

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

1 mail server

Found

PriorityHostRecordsReverse DNS
10kfn-de.mail.protection.outlook.comA 52.101.168.0 A 52.101.170.2 A 52.101.170.0 A 52.101.170.1 AAAA 2a01:111:f403:ca2d::2 AAAA 2a01:111:f403:ca2d:: AAAA 2a01:111:f403:ca2d::1 AAAA 2a01:111:f403:ca27::mail-beup281cu00100.inbound.protection.outlook.com ✓ mail-fr6p281cu00202.inbound.protection.outlook.com ✓ mail-fr5p281cu00500.inbound.protection.outlook.com ✓ mail-fr4p281cu03101.inbound.protection.outlook.com ✓ mail-fr6p281cu00202.inbound.protection.outlook.com ✓ mail-fr5p281cu00500.inbound.protection.outlook.com ✓ mail-fr4p281cu03101.inbound.protection.outlook.com ✓ mail-beup281cu00100.inbound.protection.outlook.com ✓

Checks

  • ✓ 1 MX record #9
    Found 1 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.
  • !
    Single MX host, no backup
    Only one MX record found. For better email reliability, consider adding at least one backup MX server.
    #12
  • ✓ At most 5 MX records #13
    Found 1 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

info

MTA-STS enforce · TLS-RPT · DANE on 0 of 1 MX hosts

Found

MTA-STS record
v=STSv1; id=1788510154
Policy URL
https://mta-sts.kfn.de/.well-known/mta-sts.txt
Mode
enforce
Allowed MX
kfn-de.mail.protection.outlook.com
Max age
604800 seconds
TLS-RPT record
v=TLSRPTv1; rua=mailto:reports@reports.sophosdmarc.net

DANE (TLSA records)

MX hostTLSADNSSEC
kfn-de.mail.protection.outlook.comnone-

Checks

  • ✓ Record published #32
    MTA-STS record found with id 1788510154.
  • ✓ Policy enforced #33
    The MTA-STS policy is enforced and cached for 168h0m0s.
  • ✓ All MX hosts covered #34
    Every MX host matches an mx: line of the MTA-STS policy.
  • ✓ Reports enabled #35
    TLS reports are sent to: mailto:reports@reports.sophosdmarc.net
  • 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

warn

https://portal.sophosdmarc.com/storage/domains/bimi/6jVizuqftXahASCBgeHCoXFmVrZ8C7BTT4WOe74E.svg

Found

Record
v=BIMI1; l=https://portal.sophosdmarc.com/storage/domains/bimi/6jVizuqftXahASCBgeHCoXFmVrZ8C7BTT4WOe74E.svg
Found at
default._bimi.kfn.de
Logo
https://portal.sophosdmarc.com/storage/domains/bimi/6jVizuqftXahASCBgeHCoXFmVrZ8C7BTT4WOe74E.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.