Mail domain report: topgolf.com

SPF

pass

SPF record published

Found

Record: v=spf1 ip4:216.87.95.12 ip4:52.36.14.81 ip4:54.187.241.51 ip4:38.104.35.126 ip4:192.254.120.190 ip4:149.72.231.47 ip4:149.72.196.66 ip4:89.197.9.234 include:spf.protection.outlook.com include:_spf.salesforce.com include:amazonses.com include:spf.happyfox.com include:mailgun.org ~all
DNS lookups: 10 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 10 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.topgolf.com)

Found

Record: v=DMARC1; p=reject; fo=1; rua=mailto:a.picu4og8@sdmarc.us,mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com
Found at: _dmarc.topgolf.com
External report address: mailto:a.picu4og8@sdmarc.us (authorized)
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:a.picu4og8@sdmarc.us,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:a.picu4og8@sdmarc.us, 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

warn

Selectors: k1, selector1, selector2, s1, s2

Found

Selectors: k1, selector1, selector2, s1, s2
_domainkey: NXDOMAIN

Selector	Key	Flags
k1	RSA 1024 bits
selector1	RSA 2048 bits
selector2	RSA 2048 bits
s1	RSA 2048 bits
s2	RSA 1024 bits

Checks

✓ Keys found: k1, selector1, selector2, s1, s2 #7

DKIM keys found for this domain with selectors: k1, selector1, selector2, s1, s2
!

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: k1 (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

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	topgolf-com.mail.protection.outlook.com	A 52.101.60.188 A 52.101.40.3 A 52.101.10.12 A 52.101.8.68 AAAA 2a01:111:f403:c927::6 AAAA 2a01:111:f403:c803::b AAAA 2a01:111:f403:f909::4 AAAA 2a01:111:f403:f802::1	mail-bn0pr04cu01004.inbound.protection.outlook.com ✓ mail-cy4pr03cu00203.inbound.protection.outlook.com ✓ mail-bn1pr21cu00204.inbound.protection.outlook.com ✓ mail-dm5pr05cu00104.inbound.protection.outlook.com ✓ mail-bn3pr0501cu00106.inbound.protection.outlook.com ✓ mail-bn3pr0301cu00103.inbound.protection.outlook.com ✓ mail-bn0pr03cu00304.inbound.protection.outlook.com ✓ mail-sj2pr05cu00101.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
topgolf-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://s3.topgolf.com/uploads/images/misc/bimi-dcv-tg-logo-2024-09.svg

Found

Record: v=BIMI1;l=https://s3.topgolf.com/uploads/images/misc/bimi-dcv-tg-logo-2024-09.svg;a=https://s3.topgolf.com/uploads/images/misc/digicert_com_vmc_2024-09.pem
Found at: default._bimi.topgolf.com
Logo: https://s3.topgolf.com/uploads/images/misc/bimi-dcv-tg-logo-2024-09.svg
Certificate: https://s3.topgolf.com/uploads/images/misc/digicert_com_vmc_2024-09.pem

Checks

✓ Logo and certificate published #38

BIMI logo: https://s3.topgolf.com/uploads/images/misc/bimi-dcv-tg-logo-2024-09.svg; certificate: https://s3.topgolf.com/uploads/images/misc/digicert_com_vmc_2024-09.pem
✓ DMARC meets BIMI requirements #39

DMARC is enforced on all mail, as BIMI requires.