Mail domain report: hochschule-trier.de

SPF

info

SPF record published

Found

Record: v=spf1 redirect=_spf.hochschule-trier.de
DNS lookups: 7 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 7 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to _spf.hochschule-trier.de, whose policy applies.

#3
✓ 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.hochschule-trier.de)

Found

Record: v=DMARC1;p=none;pct=100;rua=mailto:dmarc-rua@hochschule-trier.de;ruf=mailto:dmarc-ruf@hochschule-trier.de;adkim=r;aspf=r
Found at: _dmarc.hochschule-trier.de

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:dmarc-rua@hochschule-trier.de	Aggregate report addresses
ruf	mailto:dmarc-ruf@hochschule-trier.de	Failure report addresses
adkim	r	DKIM alignment (r = relaxed, s = strict)
aspf	r	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-rua@hochschule-trier.de
✓ Report addresses in own domain #29

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: default

Found

Selectors: default
_domainkey: NOERROR

Selector	Key	Flags
default	RSA 1024 bits

Checks

✓ Keys found: default #7

DKIM keys found for this domain with selectors: default
!

1024-bit DKIM key

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

#23
✓ 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: RSASHA256 (8)
Key tags: 45381, 36562
Signatures valid until: 29 October 2026, 08:40 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 2026-10-29 #21

DNSKEY signatures are valid until 2026-10-29T08:40:09Z.

MX

warn

2 mail servers

Found

Priority	Host	Records	Reverse DNS
10	gateway-a.fh-trier.de	A 143.93.54.181	gateway-a.fh-trier.de ✓
10	gateway-b.fh-trier.de	A 143.93.54.182	gateway-b.fh-trier.de ✓

Checks

✓ 2 MX records #9

Found 2 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: gateway-a.fh-trier.de, gateway-b.fh-trier.de

#11
✓ Redundant MX hosts #12

Found 2 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 2 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 2 of 2 MX hosts

Found

MTA-STS record: v=STSv1; id=20260314223000
Policy URL: https://mta-sts.hochschule-trier.de/.well-known/mta-sts.txt
Policy error: Get "https://mta-sts.hochschule-trier.de/.well-known/mta-sts.txt": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
TLS-RPT record: v=TLSRPTv1; rua=mailto:tlsrpt-rua@hochschule-trier.de

DANE (TLSA records)

MX host	TLSA	DNSSEC
gateway-a.fh-trier.de	3 1 2 6a64ac6beec18153… 3 1 1 960a64dff003562a… 3 1 1 5df2ed996009914e… 3 1 2 ab4f9074c5380207…	Yes
gateway-b.fh-trier.de	3 1 1 5df2ed996009914e… 3 1 2 ab4f9074c5380207… 3 1 1 960a64dff003562a… 3 1 2 6a64ac6beec18153…	Yes

Checks

✓ Record published #32

MTA-STS record found with id 20260314223000.
✗

Policy not reachable

The MTA-STS record exists but the policy could not be fetched, so senders ignore MTA-STS: Get "https://mta-sts.hochschule-trier.de/.well-known/mta-sts.txt": context deadline exceeded (Client.Timeout exceeded while awaiting headers).

#33
✓ Reports enabled #35

TLS reports are sent to: mailto:tlsrpt-rua@hochschule-trier.de
✓ DANE on all MX hosts #36

All 2 MX hosts 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