You've built the agent, the reply loop works, the demo lands — and then someone asks the question you didn't budget time for: "so what address does it send from?" Suddenly you're staring at noreply-svc-prod2@yourcompany.com realizing that the first thing every recipient sees isn't your prompt engineering. It's the From line.
An agent's email address is an interface. Humans parse it before the subject, mail servers judge it before the body, and spam filters score it before any human sees it at all. Once your agent has a real mailbox — which is what Nylas Agent Accounts (currently in beta) provide — address design becomes a product decision with three layers: the local part, the domain, and the disclosure question.
The local part: role beats persona beats hash
Take three candidate addresses for the same scheduling agent:
scheduling@ — a role. Tells recipients what the mailbox does and implies that emailing it is how you use the service.
