title: Does SNS guarantee at least one message delivery to SQS?
body: <p>From <a href="https://aws.amazon.com/sns/faqs/" rel="nofollow noreferrer">SNS FAQ</a>, i know there is a retry policy for SNS to SQS, but do they guarantee at least one message delivery to SQS?</p>
  
  <p>Please give official quotes.</p>