Email Authentication

rakuten-sec.co.jp

SPF

pass
Declares which servers may send mail for this domain.
v=spf1 include:spf.mta.hdems.com include:spf.messagelabs.com include:cust-spf.exacttarget.com include:_spf.salesforce.com include:_spf.rakuten-sec.co.jp include:spf.e-shishobako.ne.jp include:spf01.rakuten.co.jp ~all

DKIM

pass
Cryptographic signature on outbound mail (selector: selector1).
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDdQecY/BPaBLjJZ/UAxOvS25eTks+9cJOgT3S5tyKPNDv5/So9lEkaoZgH/xSuNzRZ4lQXSgR+AM2QPd+0qwlaIlACHZ+IIeKDfmeLoFlHOd+xBtHxJghFEb9zF8fQbn/j1BOMDdUaO2sv5Jd85kVDx5muXBHv5wiumTxXnuxMiQIDAQAB; n=1024,1455072991,1470797791

DMARC

pass
Tells receivers what to do with mail that fails SPF/DKIM. Policy: reject.
v=DMARC1; p=reject; rua=mailto:dmarc-report-a@rx.rakuten.co.jp

Mail Servers (MX)

10 cluster1.us.messagelabs.com
20 cluster1a.us.messagelabs.com