randstad.de

Checked 21 October 2026, 23:52 UTC · via 8.8.8.8
!Passed with warnings
27 passed 3 warnings 0 failed 3 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:_spf.retarus.com include:_spf.google.com include:_spf.salesforce.com include:amazonses.com include:396971.spf10.hubspotemail.net include:spf.protection.outlook.com ip4:178.77.121.136 ip4:93.190.66.6 ip4:93.190.66.3 ip4:178.77.121.128/26 ip4:185.134.242.25 ip4:195.66.99.135 ip4:62.75.247.44 ip4:212.227.89.57 ip4:217.160.226.166 ip4:185.134.240.0/24 ip4:83.246.89.68 ip4:82.165.193.1 ip4:87.79.30.25 ip4:85.25.144.9 ip4:213.52.186.141 ip4:213.52.186.142 ip4:91.217.141.0/24 ip4:87.79.30.30 ip4:54.194.192.132 ip4:193.27.49.212/30 ip6:2a00:e50:f155:7::d4/126 ip4:185.136.64.128/27 ip4:185.136.65.128/27 ~all
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).
  • ✓ 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

pass

p=reject (_dmarc.randstad.de)

Found

Record
v=DMARC1;p=reject;sp=reject;pct=100;fo=1;rua=mailto:dmarc.reports@randstad.de;ruf=mailto:dmarc.rufreports@randstad.de
Found at
_dmarc.randstad.de
TagValueMeaning
vDMARC1Version
prejectPolicy
sprejectSubdomain policy
pct100Percentage of mail the policy applies to
ruamailto:dmarc.reports@randstad.deAggregate report addresses
rufmailto:dmarc.rufreports@randstad.deFailure report addresses
fo1Failure 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:dmarc.reports@randstad.de
  • ✓ Subdomain policy: reject #20
    Subdomains are covered by policy 'reject'.
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

DKIM

pass

Selectors: google

Found

Selectors
google
_domainkey
NOERROR
SelectorKeyFlags
googleRSA 2048 bits

Checks

  • ✓ Keys found: google #7
    DKIM keys found for this domain with selectors: google
  • ✓ Strong keys #23
    DKIM keys are strong enough: google: 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 (3)
DS at parent
Yes
Algorithms
ECDSAP256SHA256 (13)
Key tags
6749, 45958, 26104
Signatures valid until
22 October 2026, 02:00 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 2h0m0s
    DNSKEY signatures expire at 2026-10-22T02:00:00Z (in 2h0m0s). Check that re-signing works.
    #21

MX

warn

2 mail servers

Found

PriorityHostRecordsReverse DNS
10mx-in01.eu.retarus.comA 94.199.92.130mx-in01.eu.retarus.com ✓
10mx-in02.eu.retarus.comA 94.199.89.39mx-in02.eu.retarus.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: mx-in01.eu.retarus.com, mx-in02.eu.retarus.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 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
mx-in01.eu.retarus.comnone-
mx-in02.eu.retarus.comnone-

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