Bulk CSV Verification

Step 1

Upload Your CSV

Drag and drop your file or use the API. We accept .csv and .txt files with emails in any column. Our parser auto-detects the email column — no formatting required.

Step 2

Verification Runs

Every address goes through MX lookup, SMTP handshake, catch-all detection, disposable email detection, and role-based address flagging. Results update in real time.

Step 3

Download Results

Download your enriched CSV with all original columns plus verification results. Filter by status before downloading to get only the rows you want.

Input Formats

• CSV (.csv) — any delimiter
• Plain text (.txt) — one email per line
• Excel exports (.csv from Excel)
• CRM exports (HubSpot, Salesforce, Apollo)

Output Columns Added

• vm_status — valid / invalid / catchall / unknown
• vm_catchall_score — 0–100 probability
• vm_mx — true/false
• vm_disposable — true/false
• vm_role_based — true/false (info@, support@, etc.)

emails in ~8 minutes

emails in ~60 minutes

file size on Business+