Mail domain report: bastei-luebbe.de

SPF

fail

SPF record published

Found

Record: v=spf1 a mx ip4:212.18.11.33/27 ip4:78.35.13.19 ip4:87.253.232.0/21 ip4:185.189.236.0/22 ip4:185.211.120.0/22 ip4:185.250.236.0/22 ip4:45.14.148.0/22 ip4:85.25.89.5/32 ip4:195.10.208.0/26 ip6:2001:67c:2050::/48 ip4:92.51.187.64/27 ip4:83.169.51.224/27 ip4:80.237.187.32/28 ip4:91.250.74.128/27 ip4:87.230.74.128/28 ip4:91.250.95.64/26 ip4:85.25.89.0/24 include:spf.pallas-security.com include:spf.sec-provider.de include:spf.protection.outlook.com include:spf.eu.exclaimer.net include:mailgun.org ~all
DNS lookups: 11 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

No ptr mechanism found in SPF record.
✗

11 DNS lookups, over the limit of 10

SPF record needs 11 DNS lookups (including nested includes), more than the limit of 10. Receivers will return a permerror; reduce includes or flatten the record.

#2
✓ 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.bastei-luebbe.de)

Found

Record: v=DMARC1; p=none; pct=100; fo=1; ri=3600; rua=mailto:db360fbe@dmarc.mailgun.org,mailto:a23197f1@inbox.ondmarc.com,mailto:it-dienste@luebbe.de; ruf=mailto:db360fbe@dmarc.mailgun.org,mailto:a23197f1@inbox.ondmarc.com;
Found at: _dmarc.bastei-luebbe.de
External report address: mailto:db360fbe@dmarc.mailgun.org (authorized)
External report address: mailto:a23197f1@inbox.ondmarc.com (authorized)
External report address: mailto:it-dienste@luebbe.de (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	none	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:db360fbe@dmarc.mailgun.org,mailto:a23197f1@inbox.ondmarc.com,mailto:it-dienste@luebbe.de	Aggregate report addresses
ruf	mailto:db360fbe@dmarc.mailgun.org,mailto:a23197f1@inbox.ondmarc.com	Failure report addresses
fo	1	Failure reporting options
ri	3600	Report interval (seconds)

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:db360fbe@dmarc.mailgun.org, mailto:a23197f1@inbox.ondmarc.com, mailto:it-dienste@luebbe.de
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

warn

Selectors: email, selector1

Found

Selectors: email, selector1
_domainkey: NOERROR

Selector	Key	Flags
email	RSA 1024 bits
selector1	RSA 2048 bits

Checks

✓ Keys found: email, selector1 #7

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

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: email (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

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
10	relay.mail.sec-provider.de	A 88.215.200.10 AAAA 2001:14c0:1001:2::10	relay.mail.sec-provider.de ✓ relay.mail.sec-provider.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

warn

no MTA-STS · no TLS-RPT · DANE on 1 of 1 MX hosts

Found

DANE (TLSA records)

MX host	TLSA	DNSSEC
relay.mail.sec-provider.de	2 1 1 0b9fa5a59eed715c…	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 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