decks.de

p=quarantine (_dmarc.decks.de)

Found

Record

v=DMARC1; p=quarantine; pct=100; ruf=mailto:webmaster@decks.de; sp=quarantine

Found at

_dmarc.decks.de

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.
• !

  No aggregate reports (rua)

  DMARC record has no rua tag, so you receive no aggregate reports about who sends mail as your domain. Add rua=mailto:...

  #19
• ✓ Subdomain policy: quarantine #20

  Subdomains are covered by policy 'quarantine'.
• ✓ Report addresses in own domain #29

  All report addresses are in your own organizational domain.

Selectors: dkim

Found

Selectors

dkim

_domainkey

NOERROR

Checks

• ✓ Keys found: dkim #7

  DKIM keys found for this domain with selectors: dkim
• !

  1024-bit DKIM key

  1024-bit RSA keys are the minimum and are considered weak today: dkim (1024 bits). Rotate to a 2048-bit key.

  #23
• ✓ No problematic flags #24

  No keys in test mode, revoked, or limited to SHA-1.

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

1 mail server

Found

Checks

• ✓ 1 MX record #9

  Found 1 MX records for this domain.
• ✓ All hosts resolve #10

  All MX records resolve to valid IP addresses.
• ✓ All hosts have IPv6 #11

  All MX records resolve to IPv6 addresses.
• !

  Single MX host, no backup

  Only one MX record found. For better email reliability, consider adding at least one backup MX server.

  #12
• ✓ At most 5 MX records #13

  Found 1 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.

MTA-STS testing · TLS-RPT · DANE on 0 of 1 MX hosts

Found

MTA-STS record

v=STSv1; id=21071976

Policy URL

https://mta-sts.decks.de/.well-known/mta-sts.txt

Mode

testing

Allowed MX

smtp.decks.de

Max age

86400 seconds

TLS-RPT record

v=TLSRPTv1; rua=mailto:webmaster@decks.de

DANE (TLSA records)

Checks

• ✓ Record published #32

  MTA-STS record found with id 21071976.
• !

  Policy in testing mode

  With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean.

  #33
• ✓ All MX hosts covered #34

  Every MX host matches an mx: line of the MTA-STS policy.
• ✓ Reports enabled #35

  TLS reports are sent to: mailto:webmaster@decks.de
• 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