Mail domain report: lexmark.com

SPF

info

SPF record published

Found

Record: v=spf1 redirect=_spf.lexmark.com
DNS lookups: 2 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 2 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to _spf.lexmark.com, 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

pass

p=reject (_dmarc.lexmark.com)

Found

Record: v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com;
Found at: _dmarc.lexmark.com
External report address: mailto:dmarc_rua@emaildefense.proofpoint.com (authorized)
External report address: mailto:dmarc_ruf@emaildefense.proofpoint.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
rua	mailto:dmarc_rua@emaildefense.proofpoint.com	Aggregate report addresses
ruf	mailto:dmarc_ruf@emaildefense.proofpoint.com	Failure report addresses
fo	1	Failure reporting options

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:dmarc_rua@emaildefense.proofpoint.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: selector1, selector2

Found

Selectors: selector1, selector2
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 2048 bits
selector2	RSA 2048 bits

Checks

✓ Keys found: selector1, selector2 #7

DKIM keys found for this domain with selectors: selector1, selector2
✓ Strong keys #23

DKIM keys are strong enough: selector1: RSA 2048 bits; selector2: RSA 2048 bits.
✓ 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: ECDSAP256SHA256 (13)
Key tags: 12196, 48553
Signatures valid until: 29 October 2026, 06:37 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 165h0m0s

DNSKEY signatures expire at 2026-10-29T06:37:10Z (in 165h0m0s). Check that re-signing works.

#21

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
1	lexmark-com.mail.protection.outlook.com	A 52.101.10.1 A 52.101.50.4 A 52.101.40.0 A 52.101.60.182 AAAA 2a01:111:f403:f909::5 AAAA 2a01:111:f403:c918:: AAAA 2a01:111:f403:c902::1 AAAA 2a01:111:f403:f804::2	mail-bn6pr02cu00301.inbound.protection.outlook.com ✓ mail-co1pr03cu00404.inbound.protection.outlook.com ✓ mail-cy3pr04cu00100.inbound.protection.outlook.com ✓ mail-bn3pr0301cu00206.inbound.protection.outlook.com ✓ mail-bn0pr04cu00805.inbound.protection.outlook.com ✓ mail-byapr04cu00400.inbound.protection.outlook.com ✓ mail-sj2pr05cu00401.inbound.protection.outlook.com ✓ mail-co1pr05cu00402.inbound.protection.outlook.com ✓

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

TLS

info

MTA-STS enforce · TLS-RPT · DANE on 0 of 1 MX hosts

Found

MTA-STS record: v=STSv1; id=1719347157
Policy URL: https://mta-sts.lexmark.com/.well-known/mta-sts.txt
Mode: enforce
Allowed MX: *.mail.protection.outlook.com
Max age: 86400 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:sts-tls-reports@lexmark.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
lexmark-com.mail.protection.outlook.com	none	-

Checks

✓ Record published #32

MTA-STS record found with id 1719347157.
✓ Policy enforced #33

The MTA-STS policy is enforced and cached for 24h0m0s.
✓ 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:sts-tls-reports@lexmark.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

pass

https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.svg

Found

Record: v=BIMI1;l=https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.svg;a=https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.pem
Found at: default._bimi.lexmark.com
Logo: https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.svg
Certificate: https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.svg; certificate: https://vmc.digicert.com/579f6c2b-67e9-4147-afa6-c48ac17c7a3a.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.