dat.de

Checked 21 October 2026, 22:12 UTC · via 8.8.8.8
!Passed with warnings
25 passed 6 warnings 0 failed 2 info

SPF

pass

SPF record published

Found

Record
v=spf1 mx a:filter001.docuguide.com ip4:149.72.132.168 ip4:167.89.109.75 ip4:198.21.3.35 ip4:2.207.132.32/27 ip4:195.245.230.0/24 ip4:213.95.132.52/32 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ip4:148.105.8.0/21 ip4:216.82.240.0/20 ip4:67.219.240.0/20 ip4:117.120.16.0/21 ip4:103.9.96.0/22 ip4:85.158.136.0/21 ip4:193.109.254.0/23 ip4:194.106.220.0/23 ip4:195.245.230.0/23 ip4:95.131.104.0/21 ip4:195.30.116.161/32 ip4:46.226.48.0/21 ip4:178.77.121.128/26 ip4:158.69.163.48/29 ip4:46.4.238.128/29 ip4:20.67.33.232/32 ip6:2607:5300:203:fe1::/112 include:spf.messagelabs.com include:_spf.salesforce.com include:spf.docuguide.com include:aw.spf.dat.de include:spf.protection.outlook.com -all
DNS lookups
10 of 10
Void lookups
0 of 2

Checks

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

Found

Record
v=DMARC1; p=quarantine
Found at
_dmarc.dat.de
TagValueMeaning
vDMARC1Version
pquarantinePolicy

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.
  • !
    No aggregate reports (rua)
    DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...
    #19
  • ✓ Subdomain policy: quarantine #20
    Subdomains are covered by policy 'quarantine'.

DKIM

warn

Selectors: k1

Found

Selectors
k1
_domainkey
NOERROR
SelectorKeyFlags
k1RSA 1024 bits

Checks

  • ✓ Keys found: k1 #7
    DKIM keys found for this domain with selectors: k1
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: k1 (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

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
10cluster8.eu.messagelabs.comA 85.158.142.216 A 85.158.142.211 A 195.245.230.198 A 195.245.231.71 A 195.245.231.66 A 195.245.230.195mail840.messagelabs.com ✓ mail835.messagelabs.com ✓ mail856.messagelabs.com ✓ mail875.messagelabs.com ✓ mail871.messagelabs.com ✓ mail853.messagelabs.com ✓
20cluster8a.eu.messagelabs.comA 34.91.159.228228.159.91.34.bc.googleusercontent.com ✓

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: cluster8.eu.messagelabs.com, cluster8a.eu.messagelabs.com
    #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 7 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=20241220070000Z
Policy URL
https://mta-sts.dat.de/.well-known/mta-sts.txt
Mode
testing
Allowed MX
cluster8.eu.messagelabs.com, cluster8a.eu.messagelabs.com
Max age
86400 seconds
TLS-RPT record
v=TLSRPTv1; rua=mailto:postmaster@dat.de

DANE (TLSA records)

MX hostTLSADNSSEC
cluster8.eu.messagelabs.comnone-
cluster8a.eu.messagelabs.comnone-

Checks

  • ✓ Record published #32
    MTA-STS record found with id 20241220070000Z.
  • !
    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:postmaster@dat.de
  • 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