Switch the top toggle to "Business Mode", enter the company domain in the "Domain" field (e.g., example.com), then set the "Format" selector to options such as "first.last", "f.last", "first" or "first_last". The tool will generate variations like john.smith@example.com, j.smith@example.com and john_s@example.com and shows an internal score column for deliverability-style heuristics. Use "Bulk Mode" to input a CSV of employee names (Accepts .csv with columns first,last) and press "Generate" to create up to 5,000 formatted addresses per run; exported CSV includes columns suggestion, type, score.