Mail domain report: virgin.com

SPF

pass

SPF record published

Found

Record: v=spf1 include:_u.virgin.com._spf.smart.ondmarc.com include:spf.protection.outlook.com ~all
DNS lookups: 8 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 8 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.virgin.com)

Found

Record: v=DMARC1; p=reject; pct=100; fo=1; ri=3600; rua=mailto:2c6e46cb@inbox.ondmarc.com; ruf=mailto:2c6e46cb@inbox.ondmarc.com;
Found at: _dmarc.virgin.com
External report address: mailto:2c6e46cb@inbox.ondmarc.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:2c6e46cb@inbox.ondmarc.com	Aggregate report addresses
ruf	mailto:2c6e46cb@inbox.ondmarc.com	Failure report addresses
fo	1	Failure reporting options
ri	3600	Report interval (seconds)

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:2c6e46cb@inbox.ondmarc.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

Found

Selectors: k1
_domainkey: NOERROR

Selector	Key	Flags
k1	RSA 1024 bits

Checks

✓ Keys found: k1 #7

DKIM keys found for this domain with selectors: k1
!

1024-bit DKIM key

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

3 mail servers

Found

Priority	Host	Records	Reverse DNS
10	eu-smtp-inbound-1.mimecast.com	A 195.130.217.241 A 91.220.42.201 A 91.220.42.211 A 195.130.217.201 A 195.130.217.211 A 91.220.42.241	eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-1.mimecast.com ✓ eu-smtp-inbound-1.mimecast.com ✓
10	eu-smtp-inbound-2.mimecast.com	A 91.220.42.241 A 195.130.217.241 A 91.220.42.211 A 195.130.217.201 A 195.130.217.211 A 91.220.42.201	eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-1.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓ eu-smtp-inbound-2.mimecast.com ✓
50	virgin-com.mail.protection.outlook.com	A 52.101.89.1 A 52.101.89.18 A 52.101.89.0 A 52.101.99.0 AAAA 2a01:111:f403:ca0b:: AAAA 2a01:111:f403:ca1a::1 AAAA 2a01:111:f403:ca0b::6 AAAA 2a01:111:f403:ca1a::	mail-lo0p265cu00201.inbound.protection.outlook.com ✓ mail-lo3p265cu00502.inbound.protection.outlook.com ✓ mail-lo2p265cu02300.inbound.protection.outlook.com ✓ mail-cwxp265cu00600.inbound.protection.outlook.com ✓ mail-lo2p265cu02300.inbound.protection.outlook.com ✓ mail-cwxp265cu00601.inbound.protection.outlook.com ✓ mail-lo3p265cu00506.inbound.protection.outlook.com ✓ mail-cwxp265cu00500.inbound.protection.outlook.com ✓

Checks

✓ 3 MX records #9

Found 3 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: eu-smtp-inbound-1.mimecast.com, eu-smtp-inbound-2.mimecast.com

#11
✓ Redundant MX hosts #12

Found 3 MX records, which provides redundancy for email delivery.
✓ At most 5 MX records #13

Found 3 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 20 MX addresss have a PTR record that resolves back to them.

TLS

warn

MTA-STS testing · TLS-RPT · DANE on 0 of 3 MX hosts

Found

MTA-STS record: v=STSv1; id=1761232481159
Policy URL: https://mta-sts.virgin.com/.well-known/mta-sts.txt
Mode: testing
Allowed MX: eu-smtp-inbound-1.mimecast.com, eu-smtp-inbound-2.mimecast.com, virgin-com.mail.protection.outlook.com
Max age: 86401 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:2c6e46cb@inbox.ondmarc.com;

DANE (TLSA records)

MX host	TLSA	DNSSEC
eu-smtp-inbound-1.mimecast.com	none	-
eu-smtp-inbound-2.mimecast.com	none	-
virgin-com.mail.protection.outlook.com	none	-

Checks

✓ Record published #32

MTA-STS record found with id 1761232481159.
!

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.

#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:2c6e46cb@inbox.ondmarc.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

info

No BIMI record

Checks

i

Not configured

BIMI shows your logo next to your mail in supporting mail clients. It requires DMARC enforcement.

#38