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Dev.to
Dev.to
7/13/2026
Audit-log every email your AI agent sends

Audit-log every email your AI agent sends

Short summary

A practical guide to building an immutable audit log for emails sent by autonomous AI agents, separating the mutable live mailbox from an append-only audit store. The author uses Nylas CLI to capture sends and inbound webhooks, storing message_ids and thread_ids in a WORM or hash-chained log that survives mailbox deletion. The architecture is provider-agnostic and addresses compliance needs when regulators or customers demand proof of what an automated system said and to whom.

  • Separate the mutable live mailbox from an append-only audit store for AI agent emails
  • Capture sends and inbound webhooks using Nylas CLI; store message_id and thread_id in a WORM log
  • Design is provider-agnostic and addresses regulatory compliance for autonomous agent communications

Generated with AI, which can make mistakes.

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