Hi,
The email feature for ACS is currently in preview and not yet available for general use.
As for the general availability of the Email feature of Azure Communication Services, Microsoft doesn't publicly disclose the exact release dates for new features or services. However, you can monitor the Azure Roadmap for updates on the feature's development and general availability. The Azure Roadmap is a publicly available website that provides an overview of the features and services that are currently in development, in preview, or generally available.
It's also worth checking the Azure Communication Services' official documentation for any updates on the feature's release, as it's updated regularly. Additionally, you can subscribe to Azure Communication Services' blog for the latest updates.
Thank you,