New Serverside Chat Functionality: Unread Message Reminders

Unread Message Reminders are a new feature in Stream Chat designed to notify users of unread messages via SMS, push notifications, or email while they are offline, primarily for 1-on-1 chat experiences across all channel types. This tutorial outlines the process for setting up this feature using external tools, focusing on sending reminder emails through SendGrid, Express, and the React Chat SDK. The setup involves configuring server settings, establishing a webhook endpoint with Express, and utilizing SendGrid's Email API to notify users of unread messages. Developers can also integrate with other notification methods and customize notifications using HTML/CSS to enhance user engagement. The example code provided demonstrates a simple implementation, emphasizing the flexibility and potential for expanding the feature to suit specific needs.