Custom Headers

This transport supports the following custom headers:

| Header | Type | Description |

| -------------------------------- | ------- | -------------------------------------------------------------------------------------------- |

| `X-Infobip-IntermediateReport` | boolean | The real-time Intermediate delivery report that will be sent on your callback server. |

| `X-Infobip-NotifyUrl` | string | The URL on your callback server on which the Delivery report will be sent. |

| `X-Infobip-NotifyContentType` | string | Preferred Delivery report content type. Can be application/json or application/xml. |

| `X-Infobip-MessageId` | string | The ID that uniquely identifies the message sent to a recipient. |

| `X-Infobip-Track` | boolean | Enable or disable open and click tracking. |

* [Infobip Api Docs](https://www.infobip.com/docs/api#channels/email)

* [Contributing](https://symfony.com/doc/current/contributing/index.html)

* [Report issues](https://github.com/symfony/symfony/issues) and

[send Pull Requests](https://github.com/symfony/symfony/pulls)

in the [main Symfony repository](https://github.com/symfony/symfony)