AgentMail via Orthogonal — Reply to a specific message. Automatically sets In-Reply-To and References headers for proper threading.

Reply to a specific message. Automatically sets In-Reply-To and References headers for proper threading.

Part of AgentMail via Orthogonal: Programmatic email for AI agents. Create inboxes, send/receive emails, manage threads and drafts. Inboxes cost $2/month. Inboxes inactive for 30+ days are automatically deleted.