VerifyFlow bulk-verifies your existing list — upload a CSV and get a SAFE, PROTECTED, RISKY, or DEAD verdict on every row, then export the clean addresses to your sending tool.
Bulk-Verify Your List FreeDrop in your list of addresses — thousands of rows at a time.
Real SMTP checks where the provider allows them. Where they don't (for example Microsoft 365 and Yahoo), the address is marked PROTECTED instead of guessed.
Each row comes back SAFE, PROTECTED, RISKY, or DEAD — a clear action per address.
Download the clean segments, ready for Instantly, Smartlead, or your tool.
Lists decay — people change jobs and addresses go dead. Sending to a stale list drives hard bounces, and a high bounce rate hurts your sender reputation and inbox placement. Bulk verification removes the DEAD addresses and flags the RISKY ones before you ever hit send.
Upload a CSV and get a verdict on every address. No card required.
Bulk-Verify Your List Free