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Creates a standard bulk-email campaign draft for the user associated with the API Key and returns its campaign ID.
This endpoint does not snapshot recipients or send email. Repeated calls create separate campaigns. A/B tests, attachments, scheduling, and API-based updates are not supported.

Authentication

Request body

Content-Type: application/json
replyTo accepts only email. Do not send a name property in the replyTo object.

Request example

Success response

The id identifies the new campaign and can be used to retrieve or start it.

Error responses