Mail domain report: webhoster.de

SPF

pass

SPF record published

Found

Record: v=spf1 include:_u.webhoster.de._spf.dmarclf.com -all
DNS lookups: 6 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 6 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.webhoster.de)

Found

Record: v=DMARC1; p=reject; pct=100; rua=mailto:64fc5c48d0569@ag.dmarcly.com; ruf=mailto:64fc5c48d0569@fo.dmarcly.com; sp=reject;
Found at: _dmarc.webhoster.de
External report address: mailto:64fc5c48d0569@ag.dmarcly.com (authorized)
External report address: mailto:64fc5c48d0569@fo.dmarcly.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
sp	reject	Subdomain policy
pct	100	Percentage of mail the policy applies to
rua	mailto:64fc5c48d0569@ag.dmarcly.com	Aggregate report addresses
ruf	mailto:64fc5c48d0569@fo.dmarcly.com	Failure report addresses

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:64fc5c48d0569@ag.dmarcly.com
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
✓ External report addresses authorized #29

Report addresses in other domains have published their authorization.

DKIM

pass

Selectors: default, mail

Found

Selectors: default, mail
_domainkey: NOERROR

Selector	Key	Flags
default	RSA 2048 bits
mail	RSA 2048 bits

Checks

✓ Keys found: default, mail #7

DKIM keys found for this domain with selectors: default, mail
✓ Strong keys #23

DKIM keys are strong enough: default: RSA 2048 bits; mail: 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: 2371, 34505
Signatures valid until: 5 December 2026, 11:59 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 2026-12-05 #21

DNSKEY signatures are valid until 2026-12-05T11:59:44Z.

MX

warn

4 mail servers

Found

Priority	Host	Records	Reverse DNS
10	spamschutz.webhoster.de	A 212.172.221.190	spamschutz.webhoster.de ✓
20	mx2.webhoster.net	A 185.159.120.90 A 185.159.122.190 A 62.26.185.190 A 62.27.118.190	spamschutz3.webhoster.de ✓ spamschutz4.webhoster.de ✓ spamschutz2b.webhoster.de ✓ spamschutzb.webhoster.de ✓
30	mx3.webhoster.org	A 62.26.185.190 A 185.159.122.190 A 62.27.118.190 A 185.159.120.90	spamschutz2b.webhoster.de ✓ spamschutz4.webhoster.de ✓ spamschutzb.webhoster.de ✓ spamschutz3.webhoster.de ✓
40	mx4.webhoster.at	A 185.159.120.90 A 185.159.122.190 A 62.27.118.190 A 62.26.185.190	spamschutz3.webhoster.de ✓ spamschutz4.webhoster.de ✓ spamschutzb.webhoster.de ✓ spamschutz2b.webhoster.de ✓

Checks

✓ 4 MX records #9

Found 4 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: spamschutz.webhoster.de, mx2.webhoster.net, mx3.webhoster.org, mx4.webhoster.at

#11
✓ Redundant MX hosts #12

Found 4 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 4 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 13 MX addresss have a PTR record that resolves back to them.

TLS

warn

MTA-STS testing · TLS-RPT · DANE on 0 of 4 MX hosts

Found

MTA-STS record: v=STSv1; id=1694274947082
Policy URL: https://mta-sts.webhoster.de/.well-known/mta-sts.txt
Mode: testing
Allowed MX: spamschutz.webhoster.de, mx1.webhoster.de, mx2.webhoster.net, mx3.webhoster.org, mx4.webhoster.at, *.webhoster.de
Max age: 3600 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:64fc5c48d0569@tls.dmarcly.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
spamschutz.webhoster.de	none	-
mx2.webhoster.net	none	-
mx3.webhoster.org	none	-
mx4.webhoster.at	none	-

Checks

✓ Record published #32

MTA-STS record found with id 1694274947082.
!

Policy in testing mode

With mode: testing, senders only report TLS problems (via TLS-RPT) and still deliver without TLS. Switch to mode: enforce once reports are clean. max_age is only 3600 seconds; use at least a week (604800) so the policy stays cached.

#33
✓ All MX hosts covered #34

Every MX host matches an mx: line of the MTA-STS policy.
✓ Reports enabled #35

TLS reports are sent to: mailto:64fc5c48d0569@tls.dmarcly.com
i

Not used

No MX host publishes TLSA records. DANE lets senders verify your mail server's certificate through DNSSEC; it requires DNSSEC on the MX host's zone.

#36

BIMI

warn

https://webhoster.de/webhoster_bimi.svg

Found

Record: v=BIMI1; l=https://webhoster.de/webhoster_bimi.svg;
Found at: default._bimi.webhoster.de
Logo: https://webhoster.de/webhoster_bimi.svg

Checks

!

No certificate (a=)

The logo is published without a Verified Mark Certificate. Gmail and Apple Mail only show BIMI logos with a VMC or CMC; Yahoo shows it without one.

#38
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.