In more malicious contexts, these lists are generated by testing credentials from other data breaches to see which ones still work on Microsoft’s platform. Common Uses (The Good and the Bad)

If you find a link to download a file with this name on a public forum or "leaks" site, proceed with extreme caution.

Use temporary or secondary email aliases when signing up for unknown websites to keep your primary Hotmail address hidden.

These files don't just appear; they are the result of several technical processes: