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v52

OpenAPI 3.1.0raw.githubusercontent.com2026-07-311,1941,9384.1 MB
Email Inboxes

Reply all to an inbox message

Sends from the inbox address through the standard email send pipeline. The To list starts with the original Reply-To (or From) and includes original To recipients; the Cc list includes original Cc recipients. The inbox address is excluded, and recipients are de-duplicated case-insensitively across To and Cc. Bcc is always empty. The subject is prefixed with Re: unless it already has that prefix.

Threading headers are derived from the original message: In-Reply-To is set to its RFC Message-ID, and References contains the original References values plus that Message-ID, de-duplicated and limited to the most recent 20 values.

post/email_inboxes/{inbox_id}/messages/{message_id}/actions/reply_all

Path parameters

inbox_idstring uuid required

Email inbox UUID.

message_idstring uuid required

Inbound email message UUID.

Request body

OR

Response

Reply-all message accepted by the standard email send pipeline.

Example response

{
  "data": {
    "recipient_statuses": {
      "bounced": 2,
      "delivered": 998
    }
  }
}