Send a batch of emails in one request
Send up to 100 independent messages in a single call. Each message uses the same body schema and the same send path as POST /send-mail, so auth, validation, rate limiting, and idempotency apply per message. Messages are processed independently: one failing does not fail the others — every message gets an entry in results carrying either data (on success) or error (on failure), with the original index.
Headers
Optional client-supplied idempotency key. Retrying a request with the same key returns the original result instead of performing the action a second time; if omitted the server derives one from the canonical payload hash. Safe to retry network failures without duplicating side effects.
Request body
Response
Per-message results. The request as a whole returns HTTP 200 even when individual messages fail; inspect each results entry.