Raw MIME storage
Resend’s signed raw.download_url expires in about an hour.
MailAgent downloads the full .eml at ingest and stores it in
Cloudflare R2 until the inbox is deleted or TTL expires.
Why
- Debug HTML/layout issues beyond
textPreview - Inspect headers and attachments offline
- QA forensics after a failed extract
API
GET /v1/inboxes/:inboxId/messages
→ { "messages": [{ "id": "…", "hasRaw": true, "rawUrl": "/v1/inboxes/…/messages/…/raw" }] }
GET /v1/inboxes/:inboxId/messages/:messageId/raw
→ Content-Type: message/rfc822
GET …/raw Accept: application/json
→ { "sizeBytes": 1234, "filename": "message-….eml" }Self-host setup
Enable R2 in the Cloudflare Dashboard first, then:
npx wrangler r2 bucket create mailagent-raw-mime
npm run deploy
Binding RAW_MIME is defined in
wrangler.jsonc. Optional env
RAW_MIME_MAX_BYTES (default 15MB).
Lifecycle
Raw files are removed when you delete an inbox, bulk-delete by
labelPrefix, or when the hourly TTL cron purges expired inboxes.