Mail domain report: bstbk.de

SPF

pass

SPF record published

Record: v=spf1 include:spf.protection.outlook.com include:maildomain._spf.datev.de include:spf.mailjet.com -all
DNS lookups: 3 of 10
Void lookups: 0 of 2

✓ 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.

fail

No DMARC record found

pass

Selectors: selector1

Selector	Key	Flags
selector1	RSA 2048 bits

✓ Keys found: selector1 #7

DKIM keys found for this domain with selectors: selector1
✓ Strong keys #23

DKIM keys are strong enough: selector1: RSA 2048 bits.
✓ No problematic flags #24

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

warn

Not signed

pass

2 mail servers

Priority	Host	Records	Reverse DNS
10	maildomain.datevnet.de	A 193.27.49.220 A 193.27.49.206 AAAA 2a00:e50:f155:7::dc AAAA 2a00:e50:f155:7::ce	maildomain.datevnet.de ✓ maildomain.datevnet.de ✓ maildomain.datevnet.de ✓ maildomain.datevnet.de ✓
20	maildomain.datevnet.com	A 193.27.49.221 A 193.27.49.207 AAAA 2a00:e50:f155:7::dd AAAA 2a00:e50:f155:7::cf	maildomain.datevnet.com ✓ maildomain.datevnet.com ✓ maildomain.datevnet.com ✓ maildomain.datevnet.com ✓

✓ 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 8 MX addresss have a PTR record that resolves back to them.

warn

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

MX host	TLSA	DNSSEC
maildomain.datevnet.de	3 1 1 df7a329f8034aef3… 3 1 1 a1f6b077746169fd…	Yes
maildomain.datevnet.com	3 1 1 a1f6b077746169fd… 3 1 1 df7a329f8034aef3…	Yes

!

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.

info

No BIMI record