# E05003 — SparkPostError

An error occurred communicating with the mail infrastructure provider.

- **HTTP status**: `500`
- **Type**: `internal_error`
- **Name**: `SparkPostError`

## What to do

Something failed on Bird's side while processing the request. Retry with exponential backoff, reusing the same `Idempotency-Key` so the retry is safe. If it persists, contact support and quote the response's `request_id`.

## Related

- [Idempotency](/docs/api/idempotency): why retries with the same key are safe
- [E05xxx — Domains & DNS](/docs/api/errors/E05xxx): every code in this range
- [Errors](/docs/api/errors): the full wire contract, status mapping, and error catalog
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`