stiftung-hsh.de

Checked 22 October 2026, 00:31 UTC · via 8.8.8.8
✗Problems found
16 passed 3 warnings 2 failed 3 info

SPF

fail

No SPF record found

Checks

  • ✗
    No SPF record
    No SPF record was found for this domain. SPF is important for preventing email spoofing. Add an SPF record to specify which servers are authorized to send email for your domain.
    #6

DMARC

fail

p=none (_dmarc.stiftung-hsh.de)

Found

Record
v=DMARC1; p=none; rua=mailto:rua-reporting@stiftung-hsh.de;
Found at
_dmarc.stiftung-hsh.de
TagValueMeaning
vDMARC1Version
pnonePolicy
ruamailto:rua-reporting@stiftung-hsh.deAggregate 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:rua-reporting@stiftung-hsh.de
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

DKIM

pass

Selectors: k1

Found

Selectors
k1
_domainkey
NOERROR
SelectorKeyFlags
k1RSA 2048 bits

Checks

  • ✓ Keys found: k1 #7
    DKIM keys found for this domain with selectors: k1
  • ✓ Strong keys #23
    DKIM keys are strong enough: k1: RSA 2048 bits.
  • ✓ No problematic flags #24
    No keys in test mode, revoked, or limited to SHA-1.

DNSSEC

warn

Signed, DS published at parent

Found

DNSKEY records
Yes (1)
DS at parent
Yes
Algorithms
ECDSAP256SHA256 (13)
Key tags
46469
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 expire in 167h0m0s
    DNSKEY signatures expire at 2026-10-29T00:00:00Z (in 167h0m0s). Check that re-signing works.
    #21

MX

warn

2 mail servers

Found

PriorityHostRecordsReverse DNS
100faust.stiftung-hsh.deA 90.187.33.57faust.stiftung-hsh.de ✓
120mailrelay01.computer-manufaktur.deA 159.69.115.172mailrelay01.computer-manufaktur.de ✓

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: faust.stiftung-hsh.de, mailrelay01.computer-manufaktur.de
    #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

no MTA-STS · no TLS-RPT · DANE on 0 of 2 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
faust.stiftung-hsh.denone-
mailrelay01.computer-manufaktur.denone-

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
  • i
    Not configured
    TLS-RPT lets senders report TLS delivery problems to you. It is most useful together with MTA-STS or DANE.
    #35
  • 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