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, scammers use them to send highly personalized "spear-phishing" emails that look like legitimate Microsoft security alerts. How to Protect Your Hotmail Account Download 472k hotmail txt
What to do if your email address is leaked - Microsoft Support Check the locks
If you suspect your information was part of a large-scale leak, follow these critical security steps: Check the locks. First off