# Testing different messaging scenarios ### 1 - **Coex number (from App) sends a text message to an API number** 02 webhooks are received: one incoming message to the API number and one echo message from the Business app number. ### 2 - API number sends a text message to a Coex number No message echo was generated. The API number received one error, but the message was sent, delivered, and read. It seems that it is not possible to check the content of the message, but it was sent and delivered correctly. ### **3 - Coex number (from API) sends a template message to the API number** Message undeliverable error. ### **4 - API number sends a template message to the Coex number** It works fine. Generated the 03 standard webhooks: sent, delivered, and read. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.360dialog.com/partner/onboarding/whatsapp-coexistence/testing-different-messaging-scenarios.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.