To maintain a high "sender reputation" and ensure your emails don't end up in spam, follow these hygiene rules: Regular Cleaning
If including additional data (like names), use Comma Delimited or Tab Separated formatting. 2. Best Practices for List Management email list txt file
| Advantage | Explanation | |-----------|-------------| | | Any operating system or programming language can read .txt files without special software. | | Lightweight | A million email addresses (~15–20 MB) load instantly. | | Easy to edit | Open with Notepad, Vim, Nano, or any text editor. No spreadsheet corruption risk. | | Version-control friendly | Git and other VCS track changes cleanly — no binary diffs. | | Scriptable | Tools like grep , sort , uniq , awk , and Python treat it natively. | | No hidden characters | Avoids Excel auto-formatting (e.g., turning emails into dates). | To maintain a high "sender reputation" and ensure