Nylas Rules Let AI Agent Mailboxes Auto-Sort Incoming Mail by Sender

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Developers building AI agents that own dedicated mailboxes like support@company.com face inbox noise from newsletters, vendor alerts, and automated notifications. Nylas offers server-side inbox Rules for Agent Accounts that automatically sort, mark, archive, or block incoming messages based on sender address, domain, or top-level domain. Rules are configured once and applied before the application ever receives the message, eliminating the need for custom webhook handlers or classifier code. However, Rules can only match on sender fields — not subject lines or message body — meaning any filtering logic beyond sender identity must be handled at the application level. The post walks through both the raw API and Nylas CLI approaches to setting up these Rules for cleaner, lower-overhead agent inbox management.

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