• Purpose
• The Idea And Working Principle
• The Idea
• The Working Principle
• How To Use
• Subscriptions And Delivery Filters
• The Inflight-limit Mbox Is Just For One Message Type
• Multi-Consumers Or Single-Consumers
• Mutable Messages
• What Does It Mean "A Message In Flight"?
• "A Message In Flight" And retained-msg Mbox
• "A Message In Flight" And Time-Limited Delivery Or Revocable Messages