Extract email domains from contacts.csv into a new domain column while retaining name and email. Preserve case by default, optionally lowercase domains, and reuse the existing Transform across runs.

Extracts the portion after “@” from email addresses in an uploaded CSV. Creates a structured Transform named Email Domains directly from contacts.csv, retaining the original name and email columns and adding a domain column. By default, domain capitalization is preserved as written. A change request can update the existing Transform to lowercase domains. Repeated runs reuse the Transform, reset removes generated results while preserving source and model assets, and a final run recreates a clean default result for inspection, reuse, and download.