Mail domain report: yahoo.com

SPF

info

SPF record published

Found

Record: v=spf1 redirect=_spf.mail.yahoo.com
DNS lookups: 3 of 10
Void lookups: 0 of 2

Checks

✓ No deprecated ptr mechanism #1

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

SPF record needs 3 DNS lookups (limit is 10).
i

Delegated via redirect

SPF record has no 'all' mechanism but redirects to _spf.mail.yahoo.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.yahoo.com)

Found

Record: v=DMARC1; p=reject; pct=100; rua=mailto:d@rua.agari.com; ruf=mailto:d@ruf.agari.com;
Found at: _dmarc.yahoo.com
External report address: mailto:d@rua.agari.com (authorized)
External report address: mailto:d@ruf.agari.com (authorized)

Tag	Value	Meaning
v	DMARC1	Version
p	reject	Policy
pct	100	Percentage of mail the policy applies to
rua	mailto:d@rua.agari.com	Aggregate report addresses
ruf	mailto:d@ruf.agari.com	Failure report addresses

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:d@rua.agari.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

No keys found under the checked selectors

Found

Selectors: None found
_domainkey: NOERROR

Checks

!

No key under common selectors

The _domainkey name exists but no DKIM key was found under the common selectors. Selectors are provider-specific; check yours with -selector.

#7

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
1	mta5.am0.yahoodns.net	A 98.136.96.75 A 98.136.96.74 A 98.136.96.77 A 67.195.228.110 A 67.195.204.73 A 98.136.96.76 A 67.195.204.77 A 67.195.228.111	mtaproxy1.free.mail.vip.ne1.yahoo.com ✓ mtaproxy2.free.mail.vip.ne1.yahoo.com ✓ mtaproxy5.free.mail.vip.ne1.yahoo.com ✓ mtaproxy3.free.mail.vip.gq1.yahoo.com ✓ mtaproxy4.free.mail.vip.bf1.yahoo.com ✓ mtaproxy4.free.mail.vip.ne1.yahoo.com ✓ mtaproxy1.free.mail.vip.bf1.yahoo.com ✓ mtaproxy4.free.mail.vip.gq1.yahoo.com ✓
1	mta6.am0.yahoodns.net	A 98.136.96.77 A 67.195.204.73 A 67.195.228.110 A 67.195.228.94 A 67.195.204.79 A 67.195.204.72 A 67.195.228.111 A 98.136.96.74	mtaproxy5.free.mail.vip.ne1.yahoo.com ✓ mtaproxy4.free.mail.vip.bf1.yahoo.com ✓ mtaproxy3.free.mail.vip.gq1.yahoo.com ✓ mtaproxy1.free.mail.vip.gq1.yahoo.com ✓ mtaproxy2.free.mail.vip.bf1.yahoo.com ✓ mtaproxy3.free.mail.vip.bf1.yahoo.com ✓ mtaproxy4.free.mail.vip.gq1.yahoo.com ✓ mtaproxy2.free.mail.vip.ne1.yahoo.com ✓
1	mta7.am0.yahoodns.net	A 67.195.204.77 A 67.195.204.72 A 98.136.96.77 A 67.195.228.111 A 67.195.204.74 A 67.195.204.73 A 67.195.228.110 A 98.136.96.74	mtaproxy1.free.mail.vip.bf1.yahoo.com ✓ mtaproxy3.free.mail.vip.bf1.yahoo.com ✓ mtaproxy5.free.mail.vip.ne1.yahoo.com ✓ mtaproxy4.free.mail.vip.gq1.yahoo.com ✓ mtaproxy5.free.mail.vip.bf1.yahoo.com ✓ mtaproxy4.free.mail.vip.bf1.yahoo.com ✓ mtaproxy3.free.mail.vip.gq1.yahoo.com ✓ mtaproxy2.free.mail.vip.ne1.yahoo.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: mta5.am0.yahoodns.net, mta6.am0.yahoodns.net, mta7.am0.yahoodns.net

#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 24 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=20161109010200Z;
Policy URL: https://mta-sts.yahoo.com/.well-known/mta-sts.txt
Mode: testing
Allowed MX: *.am0.yahoodns.net, *.mail.gm0.yahoodns.net, *.mail.am0.yahoodns.net
Max age: 86400 seconds
TLS-RPT record: v=TLSRPTv1; rua=mailto:mta_sts.report@yahoo.com

DANE (TLSA records)

MX host	TLSA	DNSSEC
mta5.am0.yahoodns.net	none	-
mta6.am0.yahoodns.net	none	-
mta7.am0.yahoodns.net	none	-

Checks

✓ Record published #32

MTA-STS record found with id 20161109010200Z.
!

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:mta_sts.report@yahoo.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