Even if a file only contains email addresses, scammers use them to send highly personalized "spear-phishing" emails that look like legitimate Microsoft security alerts. How to Protect Your Hotmail Account
While a .txt file is usually considered "plain text," it is a common vector for several security threats: Download 472k hotmail txt
Check the locks. First off, check any accounts where that email address is used as your username for signing in. Confirm that you' Microsoft Support Protect Your Personal Information From Hackers and Scammers Even if a file only contains email addresses,
Hackers use these lists of 472,000+ Hotmail accounts to see if the same passwords work on other sensitive sites like banking or social media. Download 472k hotmail txt
What to do if your email address is leaked - Microsoft Support