Uploading Your Lead List

Creating SequencesUpdated 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:

ColumnDescription
First NameThe lead's first name
EmailThe lead's email address

The more data you provide, the better MachFive can personalize each email:

ColumnWhy It Helps
Last NameAllows full name usage when appropriate
Company NameCompany-specific personalization
Job TitleRole-specific messaging
IndustryIndustry-relevant pain points and proof
Company SizeSize-appropriate offers
LocationGeographic personalization
LinkedIn URLProfile-based personalization
Company WebsiteCompany research for tailoring
Custom FieldsAny additional context (recent funding, tech stack, etc.)

Pro Tip: See MachFive Maverick: Lead Enrichment to learn how to enrich your leads with additional data points using tools like Clay.