Mail domain report: hudl.com

SPF

warn

SPF record published

Found

Record: v=spf1 ip4:4.53.33.34 ip4:52.86.7.81 ip4:54.204.241.152 ip4:72.46.52.202 ip4:40.92.0.0/15 ip4:51.4.72.0/24 ip4:51.4.80.0/27 ip4:51.5.72.0/24 ip4:51.5.80.0/27 ip4:52.73.203.75 ip4:35.191.0.0/16 ip4:66.102.0.0/20 ip4:74.125.0.0/16 ip4:184.72.240.81 ip4:184.73.199.53 ip4:50.16.196.139 ip4:50.19.116.217 ip4:69.72.32.0/20 ip4:72.3.185.0/24 ip4:104.47.0.0/17 ip4:130.248.172.0/24 ip4:130.248.173.0/24 ip4:20.47.149.138/32 ip6:2a01:4180:4050:0400::/64 include:spf1.hudl.com -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.
!

Broad IP ranges

These ranges authorize tens of thousands of addresses or more: ip4:40.92.0.0/15. Check that you really own and send from all of them.

#27

DMARC

warn

p=quarantine (_dmarc.hudl.com)

Found

Record: v=DMARC1; p=quarantine; pct=100; rua=mailto:dmarc-reports@hudl.com; ruf=mailto:dmarc-reports@hudl.com
Found at: _dmarc.hudl.com

Tag	Value	Meaning
v	DMARC1	Version
p	quarantine	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:dmarc-reports@hudl.com	Aggregate report addresses
ruf	mailto:dmarc-reports@hudl.com	Failure report addresses

Checks

!

Policy: quarantine

DMARC policy is set to 'quarantine'. Consider upgrading to 'reject' for stronger protection once you've verified legitimate emails are passing authentication.

#4
✓ 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-reports@hudl.com
✓ Subdomain policy: quarantine #20

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

All report addresses are in your own organizational domain.

DKIM

warn

Selectors: k1, selector1, selector2, google, s1, s2

Found

Selectors: k1, selector1, selector2, google, s1, s2
_domainkey: NOERROR

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

Checks

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

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

1024-bit DKIM key

1024-bit RSA keys are the minimum and are considered weak today: k1 (1024 bits), selector1 (1024 bits), google (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
0	hudl-com.mail.protection.outlook.com	A 52.101.194.158 A 52.101.60.2 A 52.101.60.160 A 52.101.9.93 AAAA 2a01:111:f403:c927:: AAAA 2a01:111:f403:f804:: AAAA 2a01:111:f403:c946::1c AAAA 2a01:111:f403:c918::	mail-ch3pr04cu00106.inbound.protection.outlook.com ✓ mail-bnypr05cu00102.inbound.protection.outlook.com ✓ mail-bn0pr04cu00800.inbound.protection.outlook.com ✓ mail-blapr04cu00105.inbound.protection.outlook.com ✓ mail-bn6pr21cu00500.inbound.protection.outlook.com ✓ mail-mw5pr21cu00100.inbound.protection.outlook.com ✓ mail-ch1pr02cu00104.inbound.protection.outlook.com ✓ mail-byapr04cu00400.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
hudl-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

warn

https://sc.hudl.com/hudl-bimi.svg

Found

Record: v=BIMI1; l=https://sc.hudl.com/hudl-bimi.svg; a=;
Found at: default._bimi.hudl.com
Logo: https://sc.hudl.com/hudl-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.