When a message is sent, the API returns a messageAck response to confirm successful processing. Depending on the message settings, additional responses may be included.
messageAck (Always Returned) → Confirms that the message was acknowledged successfully.echo = 1 → An additional response is included with the message method, containing a copy of the message object.messageDelivered – Confirms that the message was received by the user's device.messageSeen – Confirms that the user has read the message.This ensures proper message acknowledgment, delivery tracking, and read status confirmation for outbound messages.