# Step 4: Optional - Set the delivery policy for the Amazon SNS subscription
<a name="SendMessageToHttp.retry"></a>

By default, if the initial delivery of the message fails, Amazon SNS attempts up to three retries with a delay between failed attempts set at 20 seconds. As discussed in [Step 1](SendMessageToHttp.prepare.md), your endpoint should have code that can handle retried messages. By setting the delivery policy on a topic or subscription, you can control the frequency and interval that Amazon SNS will retry failed messages. You can also specify the content type for your HTTP/S notifications in `DeliveryPolicy`. For more information, see [Creating an HTTP/S delivery policy](sns-message-delivery-retries.md#creating-delivery-policy).