bo.de

Checked 21 October 2026, 21:50 UTC · via 8.8.8.8
✗Problems found
23 passed 4 warnings 1 failed 2 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:_spf.bo_de._d.easydmarc.pro -all
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).
  • ✓ 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.bo.de)

Found

Record
v=DMARC1;p=none;rua=mailto:d40ec49bc4@rua.easydmarc.eu;ruf=mailto:d40ec49bc4@ruf.easydmarc.eu;fo=1;
Found at
_dmarc.bo.de
External report address
mailto:d40ec49bc4@rua.easydmarc.eu (authorized)
External report address
mailto:d40ec49bc4@ruf.easydmarc.eu (authorized)
TagValueMeaning
vDMARC1Version
pnonePolicy
ruamailto:d40ec49bc4@rua.easydmarc.euAggregate report addresses
rufmailto:d40ec49bc4@ruf.easydmarc.euFailure report addresses
fo1Failure 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:d40ec49bc4@rua.easydmarc.eu
  • ✓ 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
10charlie.mx.blackflow.euA 140.82.37.234charlie.mx.blackflow.eu ✓
10delta.mx.blackflow.euA 46.101.69.221delta.mx.blackflow.eu ✓

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: charlie.mx.blackflow.eu, delta.mx.blackflow.eu
    #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 2 MX addresss have a PTR record that resolves back to them.

TLS

warn

MTA-STS testing · TLS-RPT · DANE on 0 of 2 MX hosts

Found

MTA-STS record
v=STSv1; id=20251230T153053;
Policy URL
https://mta-sts.bo.de/.well-known/mta-sts.txt
Mode
testing
Allowed MX
delta.mx.blackflow.eu, charlie.mx.blackflow.eu
Max age
31449600 seconds
TLS-RPT record
v=TLSRPTv1; rua=mailto:d40ec49bc4@tls.easydmarc.eu;

DANE (TLSA records)

MX hostTLSADNSSEC
charlie.mx.blackflow.eunone-
delta.mx.blackflow.eunone-

Checks

  • ✓ Record published #32
    MTA-STS record found with id 20251230T153053.
  • !
    Policy in testing mode
    With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.
    #33
  • ✓ 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:d40ec49bc4@tls.easydmarc.eu
  • 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