Automated list hygiene for AI agent email: bounce and complaint webhooks with a suppression list

Short summary

A guide to wiring deliverability webhooks (bounce, complaint) into a Nylas suppression list and outbound block rule so autonomous email agents never mail bad addresses. The architecture uses platform-level config — no application-side denylist checks — meaning the block fires on every send path automatically. The author works on the Nylas CLI and shows both raw HTTP and CLI commands for each step.

• •Deliverability webhooks feed a suppression list that blocks outbound sends at the platform level
• •Platform block rules can't be forgotten — they run on every send regardless of code path
• •Non-engineers can manage the suppression list without code changes or redeployments

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