Mail domain report: malwarebytes.com

SPF

pass

SPF record published

Found

Record: v=spf1 include:spf1.malwarebytes.com include:clients.cleverbridge.com include:spf.mtasv.net ip4:52.22.249.69 ip4:54.174.209.165 -all
DNS lookups: 9 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 9 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.malwarebytes.com)

Found

Record: v=DMARC1;p=reject;pct=100;rua=mailto:dmarc-rua@malwarebytes.com;ruf=mailto:dmarc-ruf@malwarebytes.com;fo=1
Found at: _dmarc.malwarebytes.com

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:dmarc-rua@malwarebytes.com	Aggregate report addresses
ruf	mailto:dmarc-ruf@malwarebytes.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@malwarebytes.com
✓ Subdomain policy: reject #20

Subdomains are covered by policy 'reject'.
✓ Report addresses in own domain #29

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: selector1, selector2, s1, s2

Found

Selectors: selector1, selector2, s1, s2
_domainkey: NOERROR

Selector	Key	Flags
selector1	RSA 2048 bits
selector2	RSA 1024 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: selector1, selector2, s1, s2 #7

DKIM keys found for this domain with selectors: selector1, selector2, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: selector2 (1024 bits), s2 (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 (3)
DS at parent: Yes
Algorithms: ECDSAP256SHA256 (13)
Key tags: 55044, 22341, 35735
Signatures valid until: 22 October 2026, 18:00 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 8h0m0s

DNSKEY signatures expire at 2026-10-22T18:00:00Z (in 8h0m0s). Check that re-signing works.

#21

MX

warn

1 mail server

Found

Priority	Host	Records	Reverse DNS
0	malwarebytes-com.mail.protection.outlook.com	A 52.101.9.4 A 52.101.60.188 A 52.101.42.162 A 52.101.8.68 AAAA 2a01:111:f403:c95d::4 AAAA 2a01:111:f403:f90d::1 AAAA 2a01:111:f403:f804::7 AAAA 2a01:111:f403:f909::1	mail-mn2pr05cu00304.inbound.protection.outlook.com ✓ mail-bn0pr04cu01004.inbound.protection.outlook.com ✓ mail-ea3pr05cu00102.inbound.protection.outlook.com ✓ mail-dm5pr05cu00104.inbound.protection.outlook.com ✓ mail-ph6pr04cu00104.inbound.protection.outlook.com ✓ mail-sn1pr0501cu00301.inbound.protection.outlook.com ✓ mail-co2pr03cu00307.inbound.protection.outlook.com ✓ mail-bn0pr02cu00301.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

warn

no MTA-STS · no TLS-RPT · DANE on 0 of 1 MX hosts

Found

DANE (TLSA records)

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

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
i

Not configured

TLS-RPT lets senders report TLS delivery problems to you. It is most useful together with MTA-STS or DANE.

#35
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://www.malwarebytes.com/wp-content/uploads/sites/2/2024/08/malwarebytes_inc_861163814.svg

Found

Record: v=BIMI1; l=https://www.malwarebytes.com/wp-content/uploads/sites/2/2024/08/malwarebytes_inc_861163814.svg; a=https://malwarebytes.com/wp-content/themes/malwarebytes/assets/certificates/mwb-email-campaign.pem;
Found at: default._bimi.malwarebytes.com
Logo: https://www.malwarebytes.com/wp-content/uploads/sites/2/2024/08/malwarebytes_inc_861163814.svg
Certificate: https://malwarebytes.com/wp-content/themes/malwarebytes/assets/certificates/mwb-email-campaign.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://www.malwarebytes.com/wp-content/uploads/sites/2/2024/08/malwarebytes_inc_861163814.svg; certificate: https://malwarebytes.com/wp-content/themes/malwarebytes/assets/certificates/mwb-email-campaign.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.