What feature is set to Yes by default for new indexes regarding email signatures and footers?

The feature that is set to Yes by default for new indexes primarily concerns the handling of email signatures in the indexing process. When the option to remove English email signatures is enabled, it ensures that these signatures are excluded from the indexed content. This is significant as it helps in improving the relevance and quality of the search results by eliminating the clutter generated from standard signatures that typically include disclaimers or contact information.

In this context, not removing signatures could lead to an overwhelming amount of extraneous information when users search for specific content. Therefore, the default setting aligns with best practices for maintaining cleaner and more focused index results in email data management.

By doing this, the indexes are more efficient, allowing users to find the information they need without sorting through repetitive signatures that tend to contain no valuable content related to the actual communication.