If you have a massive leads.txt file filled with duplicate email addresses or entries, you can instantly sanitize it using native shell commands: sort leads.txt | uniq > cleaned_leads.txt Use code with caution. Automated Extraction using Python

In short, leads.txt is the perfect middle ground: more structured than a sticky note, yet infinitely simpler than a full‑blown CRM.

Because it is a .txt file, double-clicking it often opens it in Notepad, which looks messy.