A single inbound email rule can carry up to 50 match conditions and 20 actions — and it runs inside the mail infrastructure itself, before your webhook handler, your queue, or any line of your application code gets involved. That changes how you build something like invoice routing. The usual approach is: receive message.created , fetch the message, check the sender, call the folders endpoint to move it. Four network hops and a handler you have to deploy and monitor. With Agent Accounts — progra