How we built DMARC Management using Cloudflare Workers

What this post added

This post details the technical implementation of Cloudflare's DMARC Management service. It explains how Cloudflare Workers and Email Routing are used to process incoming DMARC reports. Key technical components include: receiving emails via Email Routing, extracting the RUA from the 'to' attribute, using Workers KV to store domain information, reading the raw email into an ArrayBuffer, parsing MIME parts using libraries like postal-mime, storing compressed reports in R2 object storage, and publishing data to the Workers Analytics Engine using a defined schema. The architecture leverages workerd runtime and Capnproto for inter-process communication.