title: SES: Delivery Status Notification (Failure)
body: <p>I use Amazon SES to delivery mail to mobile devide Japanese such as <code>****@docomo.ne.jp</code>, <code>******@softbank.ne.jp</code>. But I always get an error.</p>
  
  <p>Example:</p>
  
  <pre><code>An error occurred while trying to deliver the mail to the following recipients:
  ******@docomo.ne.jp
  Final-Recipient: rfc822; ******@docomo.ne.jp
  Action: failed
  Diagnostic-Code: smtp; 550 Unknown user ******@docomo.ne.jp
  Status: 5.3.0
  </code></pre>