kobv.de

p=quarantine (_dmarc.kobv.de)

Found

Record

v=DMARC1;p=quarantine;sp=quarantine;rua=mailto:postmaster@zib.de;ruf=mailto:postmaster@zib.de;aspf=s;adkim=r;

Found at

_dmarc.kobv.de

External report address

mailto:postmaster@zib.de (not authorized)

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:postmaster@zib.de
• ✓ Subdomain policy: quarantine #20

  Subdomains are covered by policy 'quarantine'.
• !

  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:postmaster@zib.de (needs kobv.de._report._dmarc.zib.de). Ask the report provider to publish the record, or check the address.

  #29

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

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

5 mail servers

Found

Checks

• ✓ 5 MX records #9

  Found 5 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: mailer01-a.zib.de, mailer01-b.zib.de, mailer01.zib.de, mailer03.zib.de, mailer04.zib.de

  #11
• ✓ Redundant MX hosts #12

  Found 5 MX records, which provides redundancy for email delivery.
• ✓ At most 5 MX records #13

  Found 5 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 5 MX addresss have a PTR record that resolves back to them.

no MTA-STS · no TLS-RPT · DANE on 0 of 5 MX hosts

Found

DANE (TLSA records)

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