Uploading a Lead List
Creating ListsUpdated January 15, 2026
Drag and drop your CSV file into the upload field (or click to browse).
Required Columns
At minimum, your CSV must include:
| Column | Description |
|---|---|
| The lead's email address |
Recommended Columns (Better Personalization)
The more data you provide, the better MachFive can personalize each email:
| Column | Why It Helps |
|---|---|
| First Name | First name personalization in emails |
| Last Name | Allows full name usage when appropriate |
| Company | Company-specific personalization |
| Job Title | Role-specific messaging |
| Industry | Industry-relevant pain points and proof |
| Company Size | Size-appropriate offers |
| Location | Geographic personalization |
| LinkedIn URL | Profile-based personalization |
| Company Website | Company research for tailoring |
| Custom Fields | Any additional context (recent funding, tech stack, etc.) |
Pro Tip: Enrich your leads with additional data points using tools like Clay to improve personalization and response rates.