@SubbaGorla 

To address the challenge of extracting and attaching nested email content in Pega, you'll want to extend the out-of-the-box email listener functionality. Currently, Pega handles attachments at one level, so you would need to:

1. Create a Custom Service: Implement a service that processes incoming emails, specifically looking for .EML attachments.

2. Parse Nested Attachments: Develop a Java step within the service activity that parses .EML files to identify and extract additional attachments.

3. Use Pega APIs: Programmatically attach the extracted files to the case using Pega's APIs, such as Link-Attachment or pxAddAttachment.

Remember to test thoroughly to handle various attachment scenarios. This approach requires custom coding, but it ensures that all attachments are captured, meeting your multi-level extraction needs.