Mail domain report: xemo-net.de

SPF

pass

SPF record published

Found

Record: v=spf1 include:_spf.mail.xemo-net.de ~all
DNS lookups: 2 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 2 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

pass

p=reject (_dmarc.xemo-net.de)

Found

Record: v=DMARC1; p=reject; rua=mailto:dmarc_reports@xemo-net.de; ruf=mailto:dmarc_forensic@xemo-net.de; sp=reject; aspf=s; adkim=s; fo=0:1:d:s;
Found at: _dmarc.xemo-net.de

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
sp	reject	Subdomain policy
rua	mailto:dmarc_reports@xemo-net.de	Aggregate report addresses
ruf	mailto:dmarc_forensic@xemo-net.de	Failure report addresses
adkim	s	DKIM alignment (r = relaxed, s = strict)
aspf	s	SPF alignment (r = relaxed, s = strict)
fo	0:1:d:s	Failure reporting options

Checks

✓ Policy: reject #4

DMARC policy is set to 'reject', which provides the strongest protection against email spoofing.
✓ 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:dmarc_reports@xemo-net.de
✓ Subdomain policy: reject #20

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

All report addresses are in your own organizational domain.

DKIM

pass

Selectors: dkim

Found

Selectors: dkim
_domainkey: NOERROR

Selector	Key	Flags
dkim	RSA 2048 bits

Checks

✓ Keys found: dkim #7

DKIM keys found for this domain with selectors: dkim
✓ Strong keys #23

DKIM keys are strong enough: dkim: RSA 2048 bits.
✓ No problematic flags #24

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

DNSSEC

pass

Signed, DS published at parent

Found

DNSKEY records: Yes (2)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 18417, 58272
Signatures valid until: 17 November 2026, 11:27 UTC

Checks

✓ Signed, DS published at parent #8

DNSSEC is enabled for this domain (DNSKEY and DS present), providing additional security for DNS lookups.
✓ Signatures valid until 2026-11-17 #21

DNSKEY signatures are valid until 2026-11-17T11:27:55Z.

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
10	mail.xemo-net.de	A 193.219.97.72 AAAA 2a0d:f302:127:36c3::1	mail.xemo-net.de ✓ mail.xemo-net.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.
✓ 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.

TLS

fail

MTA-STS record without policy · TLS-RPT · DANE on 1 of 1 MX hosts

Found

MTA-STS record: v=STSv1;id=20250915064735;
Policy URL: https://mta-sts.xemo-net.de/.well-known/mta-sts.txt
Policy error: Get "https://mta-sts.xemo-net.de/.well-known/mta-sts.txt": remote error: tls: unrecognized name
TLS-RPT record: v=TLSRPTv1; rua=mailto:mta-sts@xemo-net.de

DANE (TLSA records)

MX host	TLSA	DNSSEC
mail.xemo-net.de	3 1 1 308ab94551433387…	Yes

Checks

✓ Record published #32

MTA-STS record found with id 20250915064735.
✗

Policy not reachable

The MTA-STS record exists but the policy could not be fetched, so senders ignore MTA-STS: Get "https://mta-sts.xemo-net.de/.well-known/mta-sts.txt": remote error: tls: unrecognized name.

#33
✓ Reports enabled #35

TLS reports are sent to: mailto:mta-sts@xemo-net.de
✓ DANE on all MX hosts #36

All 1 MX host publish DNSSEC-validated TLSA records.

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