openbank.de

Checked 21 October 2026, 23:41 UTC · via 8.8.8.8
✗Problems found
22 passed 4 warnings 1 failed 3 info

SPF

pass

SPF record published

Found

Record
v=spf1 exists:%{i}.spf.us.gruposantander.com exists:%{i}.spf.as.gruposantander.com -all
DNS lookups
2 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 2 of 10 DNS lookups #2
    SPF record needs 2 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=reject (_dmarc.openbank.de)

Found

Record
v=DMARC1; p=reject; fo=1; ri=3600; rua=mailto:santander@rua.dmp.cisco.com,mailto:postmanagerdmarcopen@produban.com; ruf=mailto:santander@ruf.dmp.cisco.com,mailto:postmanagerdmarcopen@produban.com
Found at
_dmarc.openbank.de
External report address
mailto:santander@rua.dmp.cisco.com (authorized)
External report address
mailto:postmanagerdmarcopen@produban.com (not authorized)
External report address
mailto:santander@ruf.dmp.cisco.com (authorized)
TagValueMeaning
vDMARC1Version
prejectPolicy
ruamailto:santander@rua.dmp.cisco.com,mailto:postmanagerdmarcopen@produban.comAggregate report addresses
rufmailto:santander@ruf.dmp.cisco.com,mailto:postmanagerdmarcopen@produban.comFailure report addresses
fo1Failure reporting options
ri3600Report interval (seconds)

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:santander@rua.dmp.cisco.com, mailto:postmanagerdmarcopen@produban.com
  • ✓ Subdomain policy: reject #20
    Subdomains are covered by policy 'reject'.
  • !
    Report address not authorized
    These report addresses are in another domain that has not agreed to receive your reports, so receivers will not send them: mailto:postmanagerdmarcopen@produban.com (needs openbank.de._report._dmarc.produban.com). Ask the report provider to publish the record, or check the address.
    #29

DKIM

fail

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NXDOMAIN

Checks

  • ✗
    No DKIM keys published
    _domainkey.openbank.de does not exist (NXDOMAIN), so no DKIM keys are published. DKIM helps prevent email spoofing. Configure DKIM with your email service provider.
    #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

4 mail servers

Found

PriorityHostRecordsReverse DNS
10mx1.santandergroup.c3s2.iphmx.comA 68.232.159.227 A 216.71.158.156 A 68.232.156.198 A 216.71.158.138 A 68.232.159.241 A 68.232.159.230 A 68.232.156.182 A 68.232.159.200 A 216.71.158.145 A 216.71.157.105 A 68.232.156.193 A 216.71.158.146 A 216.71.156.21 A 68.232.159.238 A 216.71.156.27 A 216.71.158.121 A 216.71.158.118 A 68.232.156.201 A 216.71.157.85 A 216.71.157.86esa5.santandergroup.c3s2.iphmx.com ✓ esa2.santandergroup.c3s2.iphmx.com ✓ esa8.santandergroup.c3s2.iphmx.com ✓ esa16.santandergroup.c3s2.iphmx.com ✓ esa11.santandergroup.c3s2.iphmx.com ✓ esa7.santandergroup.c3s2.iphmx.com ✓ esa4.santandergroup.c3s2.iphmx.com ✓ esa3.santandergroup.c3s2.iphmx.com ✓ esa18.santandergroup.c3s2.iphmx.com ✓ esa1.santandergroup.c3s2.iphmx.com ✓ esa6.santandergroup.c3s2.iphmx.com ✓ esa20.santandergroup.c3s2.iphmx.com ✓ esa13.santandergroup.c3s2.iphmx.com ✓ esa9.santandergroup.c3s2.iphmx.com ✓ esa15.santandergroup.c3s2.iphmx.com ✓ esa14.santandergroup.c3s2.iphmx.com ✓ esa12.santandergroup.c3s2.iphmx.com ✓ esa10.santandergroup.c3s2.iphmx.com ✓ esa17.santandergroup.c3s2.iphmx.com ✓ esa19.santandergroup.c3s2.iphmx.com ✓
10mx2.santandergroup.c3s2.iphmx.comA 68.232.159.241 A 68.232.156.198 A 68.232.159.200 A 68.232.159.227 A 216.71.158.138 A 68.232.159.238 A 68.232.159.230 A 216.71.158.145 A 216.71.156.21 A 216.71.158.118 A 216.71.158.146 A 216.71.157.105 A 216.71.156.27 A 68.232.156.182 A 216.71.158.121 A 216.71.157.86 A 68.232.156.193 A 216.71.157.85 A 68.232.156.201 A 216.71.158.156esa11.santandergroup.c3s2.iphmx.com ✓ esa8.santandergroup.c3s2.iphmx.com ✓ esa3.santandergroup.c3s2.iphmx.com ✓ esa5.santandergroup.c3s2.iphmx.com ✓ esa16.santandergroup.c3s2.iphmx.com ✓ esa9.santandergroup.c3s2.iphmx.com ✓ esa7.santandergroup.c3s2.iphmx.com ✓ esa18.santandergroup.c3s2.iphmx.com ✓ esa13.santandergroup.c3s2.iphmx.com ✓ esa12.santandergroup.c3s2.iphmx.com ✓ esa20.santandergroup.c3s2.iphmx.com ✓ esa1.santandergroup.c3s2.iphmx.com ✓ esa15.santandergroup.c3s2.iphmx.com ✓ esa4.santandergroup.c3s2.iphmx.com ✓ esa14.santandergroup.c3s2.iphmx.com ✓ esa19.santandergroup.c3s2.iphmx.com ✓ esa6.santandergroup.c3s2.iphmx.com ✓ esa17.santandergroup.c3s2.iphmx.com ✓ esa10.santandergroup.c3s2.iphmx.com ✓ esa2.santandergroup.c3s2.iphmx.com ✓
90mx1.hc5532-55.iphmx.comA 216.71.150.231 A 216.71.155.75esa.hc5532-55.iphmx.com ✓ esa.hc5532-55.iphmx.com ✓
90mx2.hc5532-55.iphmx.comA 216.71.150.231 A 216.71.155.75esa.hc5532-55.iphmx.com ✓ esa.hc5532-55.iphmx.com ✓

Checks

  • ✓ 4 MX records #9
    Found 4 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: mx1.santandergroup.c3s2.iphmx.com, mx2.santandergroup.c3s2.iphmx.com, mx1.hc5532-55.iphmx.com, mx2.hc5532-55.iphmx.com
    #11
  • ✓ Redundant MX hosts #12
    Found 4 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 4 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 44 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 4 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mx1.santandergroup.c3s2.iphmx.comnone-
mx2.santandergroup.c3s2.iphmx.comnone-
mx1.hc5532-55.iphmx.comnone-
mx2.hc5532-55.iphmx.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