For a technical look at how organizations try to secure their domains, security.txt Revisited: Analysis of Prevalence and Conformity examines the adoption of standard security reporting methods.

Essential for stopping hackers even if they have your password from a leaked "txt" file.

Research on Features Analysis of All Email Components for Phishing Detection discusses how attackers lure victims into providing the credentials that eventually end up in these "MiX" lists. Defensive Best Practices

Adopting a "Never Trust, Always Verify" approach for all data access requests.

If you are researching this to protect your own accounts from being included in such lists, experts recommend:

The research (PDF) Managing Access to Confidential Documents compares popular tools like ProtonMail and Gmail to prevent unauthorized data downloads.