Email Service Provider Market Share (2021):
This wasn't a single "hack" of Google or Microsoft. Instead, it was a "combo list"—a collection of credentials harvested from smaller, less secure websites between 2021 and 2022 How the Data Traveled The Harvest: yahoocom gmailcom hotmailcom txt 2022 2021
Where to find those old .txt files (2021–2022 era) Email Service Provider Market Share (2021): This wasn't
Microsoft no longer distributes single TXT recovery codes. Instead, they use the Authenticator app. However, if you have an old 2021 TXT file with a "Single-use code," it will work only if you haven't reset 2FA since. Gmail contacts →
.vcf or .csv (convertible to .txt).txt file (only if you use Chrome password manager).txt (suggested by Google in 2022 for 2FA backup)