This will result in logs like:
```
2014-05-02 11:16:32,719 ERROR 11860 [shoppingcart] models.py:57 - Failed sending email to billing request a refund for verified certiciate (User student, Course edx/math101/2014, CourseEnrollmentID 509, Order #136)
BotoServerError: 403 Forbidden
<ErrorResponse xmlns="http://ses.amazonaws.com/doc/2010-12-01/">
  <Error>
    <Type>Sender</Type>
    <Code>InvalidClientTokenId</Code>
    <Message>The security token included in the request is invalid</Message>
  </Error>
  <RequestId>bcd087b1-d20c-11e3-88cf-4b4f31b54ed5</RequestId>
</ErrorResponse>
```