A zero-dependency Node.js CLI. Give it a CSV and get it back with each address checked: syntax, MX records (DNS only, no SMTP probing), disposable and role flags, and typo suggestions.
npx github:5012763083a-oss/email-list-cleaner contacts.csv -o cleaned.csv
The free edition (MIT) handles 500 rows per file. Source on GitHub.
Need more rows, batch folders and a summary report? Get Email List Cleaner Pro ($9)