rakuten.com

Checked 22 October 2026, 10:24 UTC · via 8.8.8.8
!Passed with warnings
26 passed 5 warnings 0 failed 2 info

SPF

pass

SPF record published

Found

Record
v=spf1 include:spf01.rakuten.co.jp include:spf02.rakuten.co.jp include:spf03.rakuten.co.jp include:spf.protection.outlook.com include:_spf.activegate-ss.jp include:spf.mta.hdems.com ~all
DNS lookups
6 of 10
Void lookups
0 of 2

Checks

  • ✓ No deprecated ptr mechanism #1
    No ptr mechanism found in SPF record.
  • ✓ 6 of 10 DNS lookups #2
    SPF record needs 6 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.rakuten.com)

Found

Record
v=DMARC1; p=reject; rua=mailto:dmarc-report-a@rx.rakuten.co.jp
Found at
_dmarc.rakuten.com
External report address
mailto:dmarc-report-a@rx.rakuten.co.jp (authorized)
TagValueMeaning
vDMARC1Version
prejectPolicy
ruamailto:dmarc-report-a@rx.rakuten.co.jpAggregate 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:dmarc-report-a@rx.rakuten.co.jp
  • ✓ 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: selector2

Found

Selectors
selector2
_domainkey
NOERROR
SelectorKeyFlags
selector2RSA 1024 bits

Checks

  • ✓ Keys found: selector2 #7
    DKIM keys found for this domain with selectors: selector2
  • !
    1024-bit DKIM key
    1024-bit RSA keys are the minimum and are considered weak today: selector2 (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

PriorityHostRecordsReverse DNS
0rakuten-com.mail.protection.outlook.comA 52.101.124.0 A 52.101.157.40 A 52.101.124.1 A 52.101.124.5mail-tycp286cu02600.inbound.protection.outlook.com ✓ mail-os9p286cu00100.inbound.protection.outlook.com ✓ mail-ty3p286cu00101.inbound.protection.outlook.com ✓ mail-tyvp286cu00305.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.
  • !
    Hosts without IPv6
    The following MX hosts could not be resolved to IPv6 addresses: rakuten-com.mail.protection.outlook.com
    #11
  • !
    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 4 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 hostTLSADNSSEC
rakuten-com.mail.protection.outlook.comnone-

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://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred.svg

Found

Record
v=BIMI1; l=https://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred.svg;a=https://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred_177085657.pem;
Found at
default._bimi.rakuten.com
Logo
https://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred.svg
Certificate
https://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred_177085657.pem

Checks

  • ✓ Logo and certificate published #38
    BIMI logo: https://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred.svg; certificate: https://r.r10s.jp/com/bimi/r_crimsonred/r_crimsonred_177085657.pem
  • ✓ DMARC meets BIMI requirements #39
    DMARC is enforced on all mail, as BIMI requires.