Below is the IAM policy required to limit AmazonSES SMTP sending to IP and hostname

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "ses:SendRawEmail",
            "Resource": "Amazon_Resource_Name_(ARN)",
            "Condition": {
                "IpAddress": {
                    "aws:SourceIp": [
                        "ENTER.IP.HERE.THANX/32"
                    ]
                }
            }
        }
    ]
}