SNS topic not publishing to SQS

I am trying to prototype a distributed application using SNS and SQS.I have this topic:

arn:aws:sns:us-east-1:574008783416:us-east-1-live-auction

and this queue:

arn:aws:sqs:us-east-1:574008783416:queue4

I created the queue using the JS Scratchpad. I added the subscription using the Console. I AddPermission to the queue using the scratchpad. The queue policy is now:

{  
   "Version":"2008-10-17",
   "Id":"arn:aws:sqs:us-east-1:574008783416:queue4/SQSDefaultPolicy",
   "Statement":[  
      {  
         "Sid":"RootPerms",
         "Effect":"Allow",
         "Principal":{  
            "AWS":"574008783416"
         },
         "Action":"SQS:*",
         "Resource":"arn:aws:sqs:us-east-1:574008783416:queue4"
      }
   ]
}

I have an email subscription on the same topic and the emails arrive fine but the messages never arrive on the queue. I've tried SendMessage directly to the queue - rather than via SNS - using Scratchpad and it works fine. Any ideas why it won't send to the queue?

---

This was posted a while back on the AWS forums: https://forums.aws.amazon.com/thread.jspa?messageID=202798

Then I gave the SNS topic the permission to send messages to the SQS queue. The trick here is to allow all principals. SNS doesn't send from your account ID -- it has its own account ID that it sends from.

---

Here's a full CloudFormation example of Skyler's answer

"MyQueue": {
  "Type": "AWS::SQS::Queue"
},
"QueuePolicy": {
  "Type": "AWS::SQS::QueuePolicy",
  "Properties": {
    "Queues": [
      {
        "Ref": "MyQueue"
      }
    ],
    "PolicyDocument": {
      "Version": "2012-10-17",
      "Statement": [
        {
          "Sid": "allow-sns-messages",
          "Effect": "Allow",
          "Principal": "*",
          "Action": "sqs:SendMessage",
          "Condition": {
            "ArnEquals": {
              "aws:SourceArn": {
                "Ref": "MyTopic"
              }
            }
          }
        }
      ]
    }
  }
}

Amazon has more options in their Sending Amazon SNS Messages to Amazon SQS Queues document.

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