Which setting determines the output file format for emails?

The setting that determines the output file format for emails is the "Email Output" option. This choice specifically focuses on how emails will be formatted when they are exported or outputted from a system in a relativity processing environment. Typically, the Email Output setting allows users to specify details such as file format (e.g., PDF, MSG, EML) which is crucial for maintaining the integrity and usability of the email content when it is shared or stored outside the original system.

The other options are related to different functions in data processing and do not directly influence the format of the output for emails. DeNIST, for example, deals with identifying and filtering out system files from the data set being processed, while "Extract children" pertains to handling attachments associated with emails or other documents. Deduplication involves removing duplicate records or files from the dataset, which is also not related to how emails are outputted.