: This refers to plain text files ( .txt ). In the data breach world, .txt files are the preferred format for "combo lists"—massive, unformatted documents containing millions of email addresses and passwords.
When a smaller website (like an e-commerce store, a gaming forum, or a streaming service) gets hacked, cybercriminals steal its user database. If you used your Gmail or Yahoo address to sign up for that site, your email and password are now part of that stolen data. 2. Credential Stuffing Aggregations
The presence of "2023" indicates a newer batch of data, often aggregated from multiple smaller corporate data breaches that occurred or were published in 2023. 2. Scraped Email Lists for Marketing or Spam yahoocom gmailcom hotmailcom txt 2023
Winner: Outlook (34 MB).
Data aggregators and marketers build directories by using automated bots to scrape public web pages, forums, and social media platforms. When a text file is structured solely with email addresses (without passwords), it is typically utilized for outbound email marketing, building lookalike audiences in digital advertising, or generating lead databases. 3. B2C Domain Validation Lists : This refers to plain text files (
Around the same time, Hotmail was launched in 1996 by Sabeer Bhatia and Jack Smith. Hotmail, which was later acquired by Microsoft in 1997, became one of the first free web-based email services, offering users a simple and convenient way to send and receive emails.
: Used by mass-mailers to build "fresh" 2023 lists for targeted outreach or phishing. Credential Stuffing If you used your Gmail or Yahoo address
These lists are not legitimate software or services; they are tools used by cybercriminals for "credential stuffing" attacks, where automated scripts test millions of logins to gain unauthorized access to accounts.
Attackers use these emails to try and log into, or reset passwords for, other services (banking, social media). Security Best Practices