karriere.de

Checked 21 October 2026, 23:02 UTC · via 8.8.8.8
✗Problems found
11 passed 7 warnings 3 failed 3 info

SPF

fail

SPF record published

Found

Record
v=spf1 ip4:13.81.10.179 ip4:13.93.227.154 ip4:23.96.254.246 ip4:23.101.48.181 ip4:23.101.59.148 ip4:23.103.128.0/19 ip4:23.103.191.0/24 ip4:23.103.198.0/23 ip4:23.103.200.0/21 ip4:23.103.208.0/21 ip4:34.253.148.88 ip4:40.86.231.206 ip4:40.92.0.0/15 ip4:40.107.0.0/16 ip4:40.126.245.16 ip4:51.140.24.80 ip4:52.100.0.0/14 ip4:52.138.192.106 ip4:52.232.131.215 ip4:52.236.92.113 ip4:54.240.0.0/18 ip4:64.4.22.64/26 ip4:65.52.56.186 ip4:65.55.88.0/24 ip4:65.55.169.0/24 include:spf1.karriere.de -all
DNS lookups
2 of 10
Void lookups
1 of 2
Records published
2
Problem
include:spf2.karriere.de does not exist or has no records

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • !
    2 of 10 DNS lookups, with problems
    SPF record needs 2 DNS lookups (limit is 10). Problems found: include:spf2.karriere.de does not exist or has no records.
    #2
  • ✓ Ends with -all #3
    SPF record properly uses -all to restrict unauthorized senders.
  • ✓ Record published #6
    SPF record exists for this domain.
  • ✗
    Multiple SPF records
    Found 2 SPF records. Publishing more than one v=spf1 record causes a permerror; merge them into a single record.
    #16
  • ✓ Valid syntax #25
    All SPF mechanisms and modifiers are valid.
  • !
    1 void lookup
    1 include/redirect target does not exist or has no records (limit is 2). This usually is a stale include; remove it.
    #26
  • !
    Broad IP ranges
    These ranges authorize tens of thousands of addresses or more: ip4:40.92.0.0/15, ip4:52.100.0.0/14. Check that you really own and send from all of them.
    #27

DMARC

fail

No DMARC record found

Checks

  • ✗
    No DMARC record
    No DMARC record was found for this domain. DMARC is essential for preventing email spoofing. Add a DMARC record with p=reject or at least p=quarantine.
    #5

DKIM

fail

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NXDOMAIN

Checks

  • ✗
    No DKIM keys published
    _domainkey.karriere.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

1 mail server

Found

PriorityHostRecordsReverse DNS
10mail.karriere.deA 188.34.178.242static.242.178.34.188.clients.your-server.de ✓

Checks

  • ✓ 1 MX record #9
    Found 1 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: mail.karriere.de
    #11
  • !
    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 1 MX address have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 1 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mail.karriere.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