Mail domain report: hs-augsburg.de

SPF

warn

SPF record published

Found

Record: v=spf1 ip4:141.82.11.25/24 ip4:141.82.217.130/24 ip6:2001:638:102:2::217:131/80 ip6:2001:638:102:201::11:25/80 include:_spf.rexx-suite.com a:bvbvxmail.bib-bvb.de include:spf.protection.outlook.com include:customer.securityeducation.com ?all
DNS lookups: 4 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 4 DNS lookups (limit is 10).
!

Ends with ?all (neutral)

SPF record uses ?all (neutral), which gives no protection against unauthorized senders. Use -all or ~all instead.

#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.hs-augsburg.de)

Found

Record: v=DMARC1; p=none; adkim=s; aspf=s; rua=mailto:dmarc.reports@hs-augsburg.de;ruf=mailto:dmarc.reports@hs-augsburg.de;
Found at: _dmarc.hs-augsburg.de

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
rua	mailto:dmarc.reports@hs-augsburg.de	Aggregate report addresses
ruf	mailto:dmarc.reports@hs-augsburg.de	Failure 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.reports@hs-augsburg.de
✓ Report addresses in own domain #29

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: dkim, selector1, selector2

Found

Selectors: dkim, selector1, selector2
_domainkey: NOERROR

Selector	Key	Flags
dkim	RSA 2048 bits
selector1	RSA 1024 bits
selector2	RSA 1024 bits

Checks

✓ Keys found: dkim, selector1, selector2 #7

DKIM keys found for this domain with selectors: dkim, selector1, selector2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector1 (1024 bits), selector2 (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

warn

Signed, DS published at parent

Found

DNSKEY records: Yes (2)
DS at parent: Yes
Algorithms: RSASHA256 (8)
Key tags: 5974, 57079
Signatures valid until: 28 October 2026, 09:32 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 expire in 155h0m0s

DNSKEY signatures expire at 2026-10-28T09:32:02Z (in 155h0m0s). Check that re-signing works.

#21

MX

pass

2 mail servers

Found

Priority	Host	Records	Reverse DNS
30	postfix1-out.RZ.hs-augsburg.de	A 141.82.217.130 AAAA 2001:638:102:2::217:130	postfix1-out.RZ.HS-Augsburg.DE ✓ postfix1-out.RZ.HS-Augsburg.DE ✓
30	postfix2-out.RZ.hs-augsburg.de	A 141.82.217.131 AAAA 2001:638:102:2::217:131	postfix2-out.RZ.HS-Augsburg.DE ✓ postfix2-out.RZ.HS-Augsburg.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.
✓ All hosts have IPv6 #11

All MX records resolve to IPv6 addresses.
✓ 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 4 MX addresss have a PTR record that resolves back to them.

TLS

warn

no MTA-STS · no TLS-RPT · DANE on 2 of 2 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
postfix1-out.RZ.hs-augsburg.de	3 0 1 c054c77ae97359f2…	Yes
postfix2-out.RZ.hs-augsburg.de	3 0 1 c054c77ae97359f2…	Yes

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
!

Not configured

MTA-STS or DANE is used without TLS-RPT, so you get no reports when senders fail to deliver because of TLS problems. Publish _smtp._tls TXT "v=TLSRPTv1; rua=mailto:...".

#35
✓ 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