---
title: "Campaign message send rejected"
method: POST
path: "campaign.send_rejected"
tags: ["Webhooks/Webhooks", "Webhooks"]
---

# Campaign message send rejected

`POST campaign.send_rejected` (webhook)

**Event name:** `campaign.send_rejected`

A message could not be sent (insufficient credits, invalid contact, or provider rejection). Scope: location-scoped. Delivered as a signed HTTP POST to your Webhooks URL.

## Headers

- `X-Synup-Signature` string, required

## Payload

- object
  - `event` string: Dotted event name.
  - `timestamp` string: ISO-8601 UTC time the event was emitted.
  - `account_id` integer: Synup account the event belongs to.
  - `location_id` string: Numeric string for location-scoped events; null for brand-scoped events.
  - `data` object
    - `campaign_id` string: Campaign UUID.
    - `customer_id` string: Intended recipient UUID.
    - `message_id` string: Rejected message UUID.
    - `channel` string: "sms" or "email".
    - `message_type` string: Message subtype (e.g. "SmsMessage", "OpeningEmailMessage").
    - `reason` string: Rejection reason (omitted if none).

## Acknowledgement `200`

Your endpoint acknowledges receipt with any 2xx. A non-2xx response or a timeout (>10s) is treated as a failed delivery.

- object

---

[API](https://skmtc.dev/synup/apis/synup-api.md) - [All operations](https://skmtc.dev/synup/apis/synup-api/llms.txt) - [OpenAPI document](https://skmtc.dev/synup/apis/synup-api/revisions/67de2d51c22e?raw)