uni-speyer.de

Checked 22 October 2026, 00:50 UTC · via 8.8.8.8
✗Problems found
21 passed 2 warnings 2 failed 3 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:zdv.net include:mail.rz.uni-speyer.de ~all
DNS lookups
5 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 5 of 10 DNS lookups #2
    SPF record needs 5 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

fail

p=none (_dmarc.uni-speyer.de)

Found

Record
v=DMARC1; p=none; sp=none; pct=100; rua=mailto:dmarc@uni-speyer.de; ruf=mailto:dmarcfail@uni-speyer.de; fo=1;
Found at
_dmarc.uni-speyer.de
TagValueMeaning
vDMARC1Version
pnonePolicy
spnoneSubdomain policy
pct100Percentage of mail the policy applies to
ruamailto:dmarc@uni-speyer.deAggregate report addresses
rufmailto:dmarcfail@uni-speyer.deFailure report addresses
fo1Failure reporting options

Checks

  • ✗
    Policy: none (monitoring only)
    DMARC policy is set to 'none', which only monitors but doesn't protect against spoofing. Consider upgrading to 'quarantine' or ideally 'reject'.
    #4
  • ✓ Record published #5
    DMARC record exists for this domain.
  • ✓ Valid syntax #17
    DMARC record syntax is valid.
  • ✓ Aggregate reports enabled #19
    Aggregate reports are sent to: mailto:dmarc@uni-speyer.de
  • ✓ Report addresses in own domain #29
    All report addresses are in your own organizational domain.

DKIM

fail

No keys found under the checked selectors

Found

Selectors
None found
_domainkey
NXDOMAIN

Checks

  • ✗
    No DKIM keys published
    _domainkey.uni-speyer.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

pass

3 mail servers

Found

PriorityHostRecordsReverse DNS
10mailgate-1.zdv.netA 134.93.178.241 AAAA 2001:4c80:40:62d::25:1mailgate-1.zdv.net ✓ mailgate-1.zdv.net ✓
10mailgate-2.zdv.netA 134.93.178.242 AAAA 2001:4c80:40:62d::25:2mailgate-2.zdv.net ✓ mailgate-2.zdv.net ✓
10mailgate-3.zdv.netA 134.93.178.243 AAAA 2001:4c80:40:62d::25:3mailgate-3.zdv.net ✓ mailgate-3.zdv.net ✓

Checks

  • ✓ 3 MX records #9
    Found 3 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.
  • ✓ Redundant MX hosts #12
    Found 3 MX records, which provides redundancy for email delivery.
  • ✓ At most 5 MX records #13
    Found 3 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 6 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 3 MX hosts

Found

DANE (TLSA records)

MX hostTLSADNSSEC
mailgate-1.zdv.netnone-
mailgate-2.zdv.netnone-
mailgate-3.zdv.netnone-

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