List-Clean
Email validation dashboard
New Job

Create a validation job

Upload your CSV (up to 300k emails) and choose a validation mode.

Fast Clean: syntax + DNS/MX + disposable + role + dedupe
SMTP Verify: fast clean + catch-all + mailbox ping (slower)
You can leave blank to auto-generate.
SMTP mode is slower and may return “Risky/Unknown” for Gmail/Microsoft or catch-all domains.
Your data stays inside your server/database.