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Long-form writing about provider-connected email, provider-native routing, the REST API, and the parts of the platform that show up in the security review.
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Cloudflare's email path runs through four primitives that each bill separately. Here's how Workers per-request, Email Services per-email, D1 read/write/storage, and R2 storage / operations stack up — and how to keep the bill predictable.
An email API starts with where the data lives: one hosted worker scoped by domain id, and what that means in practice for compliance, exports, and exit plans.
A tour of the runtime behind Flowmails: Email Routing, the shared worker, the per-domain routing address, and the tables behind a single inbound message.
A provider-connected email platform: one shared mail worker, a domain-scoped inbox, and a REST surface your agent can call.