Large .txt files can sometimes be used to hide malicious scripts or "Zip Bombs." Ensure your antivirus is active before interacting with it. Next Steps
Run a script or use Excel’s "Remove Duplicates" (though Excel may struggle with 1M rows) to ensure you aren't counting the same person twice. 1M EU.txt
If someone on this list asks to be removed, do you have a system to purge them? Use a tool to see which entries are still active
Use a tool to see which entries are still active. Sending 1 million emails to dead accounts will get your server blacklisted. 4. Security Risks Security Risks If you only need emails, delete
If you only need emails, delete columns containing sensitive info like home addresses or birthdates immediately. 3. Cleaning and Validating the Data
Do you have documented proof that these 1 million individuals opted-in to share their data with you?