Retry a failed email

POST/api/v1/email/{id}/retry

POST /email/{id}/retry

curl -X POST 'https://www.unitpost.com/api/v1/email/email_123/retry' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'User-Agent: my-app/1.0'

Response · 200

{
  "object": "email",
  "id": "id_123",
  "to": [
    "customer@example.com"
  ],
  "from": "you@yourdomain.com",
  "subject": "Welcome to Acme",
  "template_id": "template_123",
  "campaign_id": "campaign_123",
  "status": "scheduled",
  "last_event": "string",
  "scheduled_at": "2026-01-01T00:00:00.000Z",
  "sent_at": "2026-01-01T00:00:00.000Z",
  "delivered_at": "2026-01-01T00:00:00.000Z",
  "opened_at": "2026-01-01T00:00:00.000Z",
  "clicked_at": "2026-01-01T00:00:00.000Z",
  "canceled_at": "2026-01-01T00:00:00.000Z",
  "last_error": "string",
  "created_at": "2026-01-01T00:00:00.000Z",
  "cc": [
    "string"
  ],
  "bcc": [
    "string"
  ],
  "reply_to": [
    "string"
  ],
  "tags": [
    {
      "name": "Example",
      "value": "string"
    }
  ]
}

Send a failed email again on the same id, as the dashboard's Retry does. Only a one-off send whose failure was temporary is retried: a campaign recipient, a template test, a suppressed or rejected send, or a content error is a 409 saying why (send a new email instead). It passes the same checks as a new send: the sending domain, your plan and quota. Pass an Idempotency-Key so a retried call can't send it twice. Takes no body; follow the email with Retrieve an email. Requires the emails:send capability.

Parameters2 fields

Field	Type	Description
`id`required	string · path	—
`Idempotency-Key`	string · header	Any unique string (1–256 characters, e.g. a UUID). Retrying with the same key and the same body within 24 hours returns the first result instead of sending again; the same key with a different body is `409 invalid_idempotent_request`, and one still in flight is `409 concurrent_idempotent_requests`.

Response · 200 fields21 fields

Field	Type	Description
`object`required	string	—
`id`required	string	—
`to`required	string[]	—
`from`required	string	—
`subject`required	string	—
`template_id`required	string \| null	—
`campaign_id`required	string \| null	—
`status`required	enumscheduled \| queued \| sent \| delivered \| bounced \| complained \| canceled \| failed	—
`last_event`required	string	—
`scheduled_at`required	string \| null	—
`sent_at`required	string \| null	—
`delivered_at`required	string \| null	—
`opened_at`required	string \| null	—
`clicked_at`required	string \| null	—
`canceled_at`required	string \| null	—
`last_error`required	string \| null	—
`created_at`required	string	—
`cc`	string[]	Cc recipients, as sent. Empty when none. Only on `GET /email/{id}`.
`bcc`	string[]	Bcc recipients, as sent. Empty when none. Only on `GET /email/{id}`.
`reply_to`	string[]	Reply-To addresses, as sent. Empty when none. Only on `GET /email/{id}`.
`tags`	object[]	The send's tags. Empty when none. Only on `GET /email/{id}`.

200400401403404409422429

Retry a failed email

Retry a failed email

Search docs and guides