You can now send messages to and receive messages from Amazon Simple Queue Service (SQS) FIFO (first-in-first-out) queues with applications that use the Java Message Service (JMS). Amazon SQS is a fully managed message queuing service that enables reliable communication between distributed software components and microservices at any scale. Amazon SQS FIFO queues, the newest queue type, are designed to ensure that the order in which messages are sent and received is strictly preserved, and that each message is processed exactly once.