A combolist (combination list) is a text file containing a large collection of stolen username/email and password pairs.
Never use your email password for any other service. If your "mail access" is compromised, attackers can reset passwords for all your other accounts. 247K MAIL ACCESS HQ COMBOLIST MIX .txt
To find accounts where users have reused the same password across different platforms. The Threat: Credential Stuffing A combolist (combination list) is a text file