Use this link please https://docs.adobe.com/content/help/en/campaign-standard/using/developing/adding-or-extending-a-resource/configuring-the-resource-s-data-structure.html#defining-sending-logs-extension

Team... i know there is a 404 link... please use the below link. for access the detailed documentation https://docs.adobe.com/content/help/en/campaign-standard/using/developing/adding-or-extending-a-resource/configuring-the-resource-s-data-structure.html#defining-sending-logs-extension