Drop your email list as a CSV file. We'll automatically validate syntax, verify domain MX records, and perform live SMTP mailbox checks, handing you back a clean CSV with accurate verdicts per row.
Every single row undergoes syntax parsing, MX record validation, and real-time SMTP mailbox handshake.
Watch verdicts stream in with automated real-time polling. Safe, risky, and invalid counters update live.
Download a ready-to-use CSV with all verdicts and error classifications. Import directly into your CRM or Google Sheets.
Tips and best practices for cleaning large contact lists and improving cold outreach inbox rates.
We support standard .csv and .txt files up to 50,000 rows. You can select whichever column contains the email addresses using our visual column picker before running.
Yes. Duplicate email addresses are verified once to save time and bandwidth, and your exported CSV preserves your exact original rows and ordering.
Always send to the Clean List (Safe + Catch-All + Valid Domain). Avoid sending to addresses marked as Invalid / Dead to protect your sender score and keep bounce rates near 0%.
Yes! The downloaded CSV has standard headers (input, email_address, is_reachable, syntax, mx, provider) that map cleanly into all major marketing and CRM tools.
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