ruv.de

Checked 22 October 2026, 00:01 UTC · via 8.8.8.8
!Passed with warnings
24 passed 4 warnings 0 failed 3 info

SPF

pass

SPF record published

Found

Record
v=spf1 mx ip4:46.254.120.108 ip4:87.118.119.79 -all
DNS lookups
1 of 10
Void lookups
0 of 2

Checks

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

Found

Record
v=DMARC1;p=reject;rua=mailto:g_dmarc-reports@ruv.de;ruf=mailto:g_dmarc_reports_f@ruv.de;
Found at
_dmarc.ruv.de
TagValueMeaning
vDMARC1Version
prejectPolicy
ruamailto:g_dmarc-reports@ruv.deAggregate report addresses
rufmailto:g_dmarc_reports_f@ruv.deFailure report addresses

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:g_dmarc-reports@ruv.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

warn

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NOERROR

Checks

  • !
    No key under common selectors
    The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.
    #7

DNSSEC

pass

Signed, DS published at parent

Found

DNSKEY records
Yes (3)
DS at parent
Yes
Algorithms
RSASHA256 (8)
Key tags
3775, 499, 21994
Signatures valid until
12 November 2026, 07:14 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 valid until 2026-11-12 #21
    DNSKEY signatures are valid until 2026-11-12T07:14:23Z.

MX

warn

6 mail servers

Found

PriorityHostRecordsReverse DNS
5mail101.ruv.deA 91.235.236.17mail101.ruv.de ✓
5mail102.ruv.deA 149.249.8.140mail102.ruv.de ✓
5mail103.ruv.deA 193.28.56.15mail103.ruv.de ✓
5mail201.ruv.deA 91.235.236.18mail201.ruv.de ✓
5mail202.ruv.deA 149.249.8.141mail202.ruv.de ✓
5mail203.ruv.deA 193.28.56.16mail203.ruv.de ✓

Checks

  • ✓ 6 MX records #9
    Found 6 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: mail101.ruv.de, mail102.ruv.de, mail103.ruv.de, mail201.ruv.de, mail202.ruv.de, mail203.ruv.de
    #11
  • ✓ Redundant MX hosts #12
    Found 6 MX records, which provides redundancy for email delivery.
  • !
    More than 5 MX records
    Found 6 MX records, which is more than the recommended maximum of 5. Too many MX records may indicate a misconfiguration.
    #13
  • ✓ 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 6 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 6 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mail101.ruv.denone-
mail102.ruv.denone-
mail103.ruv.denone-
mail201.ruv.denone-
mail202.ruv.denone-
mail203.ruv.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