metro.de

Checked 21 October 2026, 23:22 UTC · via 8.8.8.8
!Passed with warnings
23 passed 5 warnings 0 failed 4 info

SPF

info

SPF record published

Found

Record
v=spf1 include:spf.protection.outlook.com include:email.event-hub.ipreo.com include:ipreomail.com include:mailing.eqs.com ip4:213.32.181.165 ip4:212.18.1.50 ip4:212.18.21.82 ip4:34.142.108.204 ip4:35.158.67.243 ip4:35.158.71.15 ip4:18.184.155.228 ip4:18.184.214.37 exists:%{i}.spf.hc611-36.eu.iphmx.com exists:%{i}.spf.hc2116-98.eu.iphmx.com redirect=spf.metro.info
DNS lookups
8 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 8 of 10 DNS lookups #2
    SPF record needs 8 DNS lookups (limit is 10).
  • i
    Delegated via redirect
    SPF record has no 'all' mechanism but redirects to spf.metro.info, whose policy applies.
    #3
  • ✓ 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.metro.de)

Found

Record
v=DMARC1; p=quarantine; rua=mailto:4e4w5tjg5g@rua.powerdmarc.com,mailto:dmarc-rua@metro.digital;
Found at
_dmarc.metro.de
External report address
mailto:4e4w5tjg5g@rua.powerdmarc.com (authorized)
External report address
mailto:dmarc-rua@metro.digital (authorized)
TagValueMeaning
vDMARC1Version
pquarantinePolicy
ruamailto:4e4w5tjg5g@rua.powerdmarc.com,mailto:dmarc-rua@metro.digitalAggregate report addresses

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.
  • ✓ Aggregate reports enabled #19
    Aggregate reports are sent to: mailto:4e4w5tjg5g@rua.powerdmarc.com, mailto:dmarc-rua@metro.digital
  • ✓ Subdomain policy: quarantine #20
    Subdomains are covered by policy 'quarantine'.
  • ✓ External report addresses authorized #29
    Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: mail, selector1, s1, s2

Found

Selectors
mail, selector1, s1, s2
_domainkey
NOERROR
SelectorKeyFlags
mailRSA 1024 bits
selector1RSA 1024 bits
s1RSA 2048 bits
s2RSA 1024 bits

Checks

  • ✓ Keys found: mail, selector1, s1, s2 #7
    DKIM keys found for this domain with selectors: mail, selector1, s1, s2
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: mail (1024 bits), selector1 (1024 bits), s2 (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
10mx1.hc611-36.eu.iphmx.comA 207.54.77.186 A 23.90.104.169esa.hc611-36.eu.iphmx.com ✓ esa.hc611-36.eu.iphmx.com ✓
10mx2.hc611-36.eu.iphmx.comA 23.90.104.169 A 207.54.77.186esa.hc611-36.eu.iphmx.com ✓ esa.hc611-36.eu.iphmx.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: mx1.hc611-36.eu.iphmx.com, mx2.hc611-36.eu.iphmx.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 4 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
mx1.hc611-36.eu.iphmx.comnone-
mx2.hc611-36.eu.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