The new bulk endpoint allows users to send up to 100 emails in a single API call, simplifying the process of sending multiple emails to multiple recipients without requiring custom code or third-party services. This feature is designed to handle infrastructure and orchestration complexity, enabling developers to focus on their product. The Resend SDKs can be used to send batch emails, and users can check the Resend OpenAPI spec or Postman collection for all parameters. However, note that attachments and tags are not yet supported, and the number of emails per batch is customizable with support contact options available.