4 min read

CSV import errors

Fix failed or partial lead imports.

Overview

CSV errors usually involve missing emails, duplicate headers, invalid formatting, or unsupported file structure.

Recommended workflow

1

Open the error details after upload.

2

Check for a header row and email column.

3

Remove blank rows and duplicate headers.

4

Save again as CSV.

5

Upload a small sample to confirm the fix.

Tips that make this work better

Tip

Use UTF-8 CSV when possible.

Tip

Keep one lead per row.

Tip

Avoid formulas in exported values.

Common mistakes to avoid

  • Uploading a spreadsheet with multiple tabs.
  • Leaving merged cells in the source sheet.

Done well, this should leave you with

A cleaner Outlio setup, fewer avoidable campaign issues, and a more reliable path from setup to replies.

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