Microsoft provides a "Recent Activity" page (under Security settings). Check it regularly for unrecognized login attempts or locations.
or a Python script to strip whitespace or non-printable characters that can cause import errors. 2. Add Classification Metadata (Columns) Hotmail Valid.txt
If you’re building an app, use Microsoft Graph API to let users share their email address with permission. This gives you validated, real-time data. Microsoft provides a "Recent Activity" page (under Security
Each line contains one email address. In some technical exports, you might also see a "pass" or "valid" status next to it. Hotmail Valid.txt