Use a reputable service like Have I Been Pwned to see if your email address has appeared in known public breaches.
It is primarily used for Credential Stuffing . Attackers use automated bots to "stuff" these combinations into the login pages of popular sites (like Netflix, Spotify, or banking portals) to see if the victim reused the same password. 90K MIX COMBO VIP_COMBO_0.txt
This file contains credentials (formatted typically as email:password ) harvested from various third-party data breaches. Use a reputable service like Have I Been
If you suspect your information may be included in this or similar leaks: 90K MIX COMBO VIP_COMBO_0.txt