Mail domain report: klett.de

SPF

pass

SPF record published

Found

Record: v=spf1 mx include:spf.mail.services.k-sys.io -all
DNS lookups: 3 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✓ 3 of 10 DNS lookups #2

SPF record needs 3 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.klett.de)

Found

Record: v=DMARC1; p=none; rua=mailto:dmarc_agg@vali.email; adkim=s;aspf=s; pct=100;
Found at: _dmarc.klett.de
External report address: mailto:dmarc_agg@vali.email (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:dmarc_agg@vali.email	Aggregate report addresses
adkim	s	DKIM alignment (r = relaxed, s = strict)
aspf	s	SPF alignment (r = relaxed, s = strict)

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_agg@vali.email
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

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

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

Priority	Host	Records	Reverse DNS
0	mx.mail.services.k-sys.io	A 91.207.162.70	mx.mail.services.k-sys.io ✓

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: mx.mail.services.k-sys.io

#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

info

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

Found

MTA-STS record: v=STSv1; id=20250312111600Z
Policy URL: https://mta-sts.klett.de/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: mx.mail.services.k-sys.io, *.mail.protection.outlook.com
Max age: 86400 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:techmaster@klett-it.net

DANE (TLSA records)

MX host	TLSA	DNSSEC
mx.mail.services.k-sys.io	none	-

Checks

✓ Record published #32

MTA-STS record found with id 20250312111600Z.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 24h0m0s.
✓ 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:techmaster@klett-it.net
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