Reference
Remy Reference/agent/EmailBatchLifecycle
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EmailBatchLifecycle

Type
The delivery lifecycle of a queued send, from accepted through completed, partial, or failed.

The delivery lifecycle of a queued send, carried on EmailBatch.status. accepted is queued with nothing delivered yet, sending is in progress, completed handed every recipient to the provider, partial finished with some recipients not sent to, and failed finished having sent nothing. It appears only for queued sends: a small inline send carries a null status because it had already finished when the call resolved.

EmailBatchLifecycle.ts
type EmailBatchLifecycle =
  | 'accepted'
  | 'sending'
  | 'completed'
  | 'partial'
  | 'failed'