While the specific "199k" file may be a smaller subset or a repackaged older list, several massive credential exposures have recently impacted Gmail users: Combolists and ULP Files on the Dark Web - Group-IB

: Typically formatted as email:password or username:password , these lists are designed for direct ingestion into automated hacking tools like OpenBullet.

: Security researchers often find that public combolists contain significant amounts of recycled or fake data used to inflate the perceived value of the leak. Major Recent Gmail Leaks